{"id":31033,"date":"2024-02-15T10:00:18","date_gmt":"2023-09-26T19:17:57","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90kotlin%e3%80%91%e3%80%90java%e3%80%91%e5%85%b3%e4%ba%8ekotlin%e5%92%8cjava%e7%9a%84%e6%af%94%e8%be%83%e5%a4%87%e5%bf%98%e5%bd%95\/"},"modified":"2025-08-12T21:58:37","modified_gmt":"2025-08-12T13:58:37","slug":"%e3%80%90kotlin%e3%80%91%e3%80%90java%e3%80%91%e5%85%b3%e4%ba%8ekotlin%e5%92%8cjava%e7%9a%84%e6%af%94%e8%be%83%e5%a4%87%e5%bf%98%e5%bd%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90kotlin%e3%80%91%e3%80%90java%e3%80%91%e5%85%b3%e4%ba%8ekotlin%e5%92%8cjava%e7%9a%84%e6%af%94%e8%be%83%e5%a4%87%e5%bf%98%e5%bd%95\/","title":{"rendered":"\u3010Kotlin\u3011\u3010Java\u3011\u5173\u4e8eKotlin\u548cJava\u7684\u6bd4\u8f83\u5907\u5fd8\u5f55"},"content":{"rendered":"

\u4ec0\u4e48\u6837\u7684\u6587\u7ae0\uff1f<\/p>\n

\u5982\u679c\u7528Java\u6765\u7f16\u5199\u7684\u8bdd\uff0c\u90a3\u4e48\u7528Kotlin\u8be5\u600e\u4e48\u5199\u5462\uff1f\u4e00\u4e2a\u5173\u4e8e\u4ee3\u7801\u6bd4\u8f83\u7684\u5907\u5fd8\u5f55\u3002<\/p>\n

\u611f\u8c22\u60a8\u63d0\u4f9b\u7684\u8bc4\u8bba\uff0c\u6211\u6839\u636e\u60a8\u7684\u610f\u89c1\u8fdb\u884c\u4e86\u4fee\u6539\u548c\u6269\u5145\uff0c\u89e3\u91ca\u4e86@JvmField\u548cconst\u4e4b\u95f4\u7684\u533a\u522b\u3002<\/p>\n

\u6700\u8fd1\uff0c\u6211\u5728\u73a9Kotlin\uff0c\u5c0d\u5b83\u7522\u751f\u4e86\u8208\u8da3\u3002
\n\u6709\u5f88\u591a\u6574\u7406Kotlin\u8a9e\u6cd5\u7684\u6587\u7ae0\uff0c
\n\u4f46\u627e\u4e0d\u5230\u8ddfJava\u4ee3\u78bc\u9032\u884c\u6bd4\u8f03\u7684\uff0c\u6240\u4ee5\u6211\u6703\u8a18\u9304\u4e0b\u4f86\u3002
\n\u5728\u5de5\u4f5c\u4e0a\uff0c\u5927\u90e8\u5206\u9084\u662f\u7528Java\uff0c\u70ba\u4e86\u907f\u514d\u6df7\u6dc6\u6240\u4ee5\u8a18\u9304\u4e0b\u4f86\u7684\u76ee\u7684\u3002<\/p>\n

\u8bf7\u5199\u4e00\u4e9b\u57fa\u7840\u7684\u4e1c\u897f\u3002<\/p>\n

\u58f0\u660e\u53d8\u91cf<\/p>\n
\n
\n\n\n\u64cd\u4f5c<\/th>\nKotlin<\/th>\nJava<\/th>\n<\/tr>\n<\/thead>\n\n\n\u5b9a\u6570<\/td>\n\u4fee\u98fe\u5b50 val \u5909\u6570\u540d : \u578b<\/td>\n\u4fee\u98fe\u5b50 final \u578b \u5909\u6570\u540d<\/td>\n<\/tr>\n\n\u5909\u6570<\/td>\n\u4fee\u98fe\u5b50 var \u5909\u6570\u540d : \u578b<\/td>\n\u4fee\u98fe\u5b50 \u578b \u5909\u6570\u540d<\/td>\n<\/tr>\n\n\u30e1\u30bd\u30c3\u30c9\u30fb\u95a2\u6570<\/td>\nfun \u95a2\u6570\u540d(\u5909\u6570\u540d: \u578b…): \u623b\u308a\u5024<\/td>\n\u623b\u308a\u5024 \u95a2\u6570\u540d(\u578b \u5909\u6570\u540d…)<\/td>\n<\/tr>\n<\/tbody>\n

\u578b\u63a8\u8ad6 –> \u7c7b\u578b\u63a8\u8bba<\/p>\n

\u5728 Kotlin \u4e2d\uff0c\u7531\u4e8e\u7c7b\u578b\u63a8\u65ad\u7684\u5b58\u5728\uff0c\u53ef\u4ee5\u7701\u7565\u7c7b\u578b\u800c\u5b9a\u4e49\u53d8\u91cf\u3002<\/p>\n

String<\/span> str<\/span> =<\/span> \"\u6587\u5b57\u5217\"<\/span>;<\/span>\r\nfinal<\/span> int<\/span> value<\/span> =<\/span> 0<\/span>;<\/span>\r\n<\/code><\/pre>\n
var<\/span> str<\/span> =<\/span> \"\u6587\u5b57\u5217\"<\/span>\r\nval<\/span> value<\/span> =<\/span> 0<\/span>\r\n<\/code><\/pre>\n
\u5b57\u7b26\u5e8f\u5217<\/p>\n
\u5b57\u7b26\u4e32\u7684\u62fc\u63a5<\/p>\n
\u5728Kotlin\u4e2d\uff0c\u53ef\u4ee5\u5728\u5b57\u7b26\u4e32\u5b57\u9762\u503c\u4e2d\u63d2\u5165\u8868\u8fbe\u5f0f\u3002<\/p>\n
String<\/span> name<\/span> =<\/span> \"Benjamin Franklin\"<\/span>;<\/span>\r\nint<\/span> age<\/span> =<\/span> 20<\/span>\r\nString<\/span> text<\/span> =<\/span> \"Your name is \"<\/span> +<\/span> name<\/span> +<\/span> \". You'll be \"<\/span> +<\/span> (<\/span>age<\/span> +<\/span> 1<\/span>)<\/span> +<\/span> \" years old next year.\"<\/span>;<\/span>\r\n<\/code><\/pre>\n
var<\/span> name<\/span> =<\/span> \"Benjamin Franklin\"<\/span>\r\nvar<\/span> age<\/span> =<\/span> 20<\/span>\r\nvar<\/span> text<\/span> =<\/span> \"Your name is $name. You'll be ${age + 1} years old next year.\"<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u53ea\u63d2\u5165\u53d8\u91cf\u540d\uff0c\u5219\u53ef\u4ee5\u7701\u7565\u82b1\u62ec\u53f7\u3002<\/p>\n
\u539f\u59cb\u5b57\u7b26\u4e32\u5b57\u9762\u610f\u601d\u662f\u76f4\u63a5\u4f7f\u7528\u5b57\u7b26\u8868\u793a\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n
\u7528\u4e09\u4e2a\u53cc\u5f15\u53f7\u62ec\u8d77\u6765\u7684\u5b57\u7b26\u4e32\u88ab\u79f0\u4e3a\u539f\u59cb\u5b57\u7b26\u4e32\u5b57\u9762\u91cf\uff0c
\n\u5b83\u4eec\u4e0d\u4f1a\u8f6c\u4e49\u7279\u6b8a\u5b57\u7b26\u5982\u53cd\u659c\u6760\u548c\u6362\u884c\uff0c\u5e76\u4fdd\u6301\u539f\u6837\u663e\u793a\u3002<\/p>\n
String<\/span> add<\/span> =<\/span> \"IJKL\"<\/span>;<\/span>\r\nString<\/span> text<\/span> =<\/span> \"ABCD\\n\"<\/span> +<\/span>\r\n               \"EFGH\\n\"<\/span> +<\/span>\r\n               add<\/span> +<\/span> \"\\n\"<\/span> +<\/span>\r\n              \"MNOP\"<\/span>;<\/span>\r\n<\/code><\/pre>\n
var<\/span> add<\/span> =<\/span> \"IJKL\"<\/span>\r\nvar<\/span> text<\/span> =<\/span> \"\"\"\r\nABCD\r\nEFGH\r\n$add\r\nMNOP\r\n\"\"\"<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u4f60\u60f3\u8981\u6392\u9664\u7f29\u8fdb\u7b49\u7b49\u7684\u5f71\u54cd\uff0c
\n\u5982\u679c\u4e0d\u60f3\u8981\u53cd\u6620\u7f29\u8fdb\uff0c\u53ef\u4ee5\u5728\u884c\u9996\u653e\u7f6e\u4e00\u4e2a\u7ad6\u7ebf\uff0c\u5e76\u8c03\u7528trimMargin()\u3002<\/p>\n
var<\/span> add<\/span> =<\/span> \"IJKL\"<\/span>\r\nvar<\/span> text<\/span> =<\/span> \"\"\"\r\n           |ABCD\r\n           |EFGH\r\n           |$add\r\n           |MNOP\r\n           \"\"\"<\/span>.<\/span>trimMargin<\/span>()<\/span>\r\n<\/code><\/pre>\n
\u53ef\u9009\u7684 (K\u011b  de)<\/p>\n
\u5728\u4f17\u591aKotlin\u529f\u80fd\u4e2d\uff0c\u8fd9\u662f\u5176\u4e2d\u4e00\u4e2a\u6700\u5f3a\u5927\u7684\u3002
\nKotlin\u88ab\u8bbe\u8ba1\u4e3anull\u5b89\u5168\uff0c\u5b83\u7684\u9ed8\u8ba4\u8bbe\u7f6e\u662f\u4e0d\u5141\u8bb8\u51fa\u73b0null\u503c\u3002
\n\u4e3e\u4f8b\u6765\u8bf4\uff0c<\/p>\n
val<\/span> a<\/span>:<\/span> String<\/span> =<\/span> null<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u5c06\u4f1a\u5bfc\u81f4\u7f16\u8bd1\u9519\u8bef\u3002
\n\u56e0\u4e3a\u5728Kotlin\u4e2d\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u4e0d\u5141\u8bb8null\uff0c\u6240\u4ee5\u4f1a\u8fd9\u6837\u3002
\n\u5982\u679c\u60f3\u8981\u5141\u8bb8null\uff0c\u53ef\u4ee5\u5728\u7c7b\u578b\u540e\u9762\u52a0\u4e0a?\u3002<\/p>\n
val<\/span> a<\/span>:<\/span> String<\/span>?<\/span> =<\/span> null<\/span> \/\/ \u3053\u308c\u306fOK<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u8981\u8bbf\u95ee\u5e26\u6709\u53ef\u9009\u6807\u8bb0\u7684\u53d8\u91cf\uff0c\u5fc5\u987b\u59cb\u7ec8\u8fdb\u884c\u7a7a\u503c\u68c0\u67e5\u3002\u4e0eJava\u8fdb\u884c\u6bd4\u8f83\u3002<\/p>\n
String<\/span> a<\/span> =<\/span> null<\/span>;<\/span>\r\na<\/span>.<\/span>contains<\/span>(<\/span>\"hoge\"<\/span>);<\/span> \/\/ \u5f53\u7136null\u306a\u306e\u3067\u30cc\u30eb\u30dd\u3067\u843d\u3061\u308b<\/span>\r\n<\/code><\/pre>\n
var<\/span> a<\/span>:<\/span> String<\/span>?<\/span> =<\/span> null<\/span>\r\na<\/span>.<\/span>contains<\/span>(<\/span>\"hoge\"<\/span>)<\/span> \/\/ \u305d\u3082\u305d\u3082\u30b3\u30f3\u30d1\u30a4\u30eb\u304c\u901a\u3089\u306a\u3044<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u6bb5 Kotlin \u4ee3\u7801\u4f1a\u5728\u7f16\u8bd1\u65f6\u88ab\u62d2\u7edd\u3002
\n\u56e0\u4e3a\u5b83\u6ca1\u6709\u4fdd\u8bc1 NotNull\u3002
\n\u8981\u8bbf\u95ee Nullable \u7684\u7c7b\u578b\uff0c\u9700\u8981\u8fd9\u6837\u505a\u3002<\/p>\n
\u9996\u5148\u662fJava\u4e2d\u719f\u6089\u7684\u7a7a\u503c\u68c0\u67e5\u3002<\/p>\n
String<\/span> a<\/span> =<\/span> null<\/span>;<\/span>\r\n\r\nif<\/span> (<\/span>a<\/span> !=<\/span> null<\/span>)<\/span> {<\/span>\r\n    a<\/span>.<\/span>contains<\/span>(<\/span>\"hoge\"<\/span>);<\/span> \/\/ null\u306a\u3089\u3053\u3053\u306f\u901a\u3089\u306a\u3044<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u4f7f\u7528Java8\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e00\u79cd\u88ab\u79f0\u4e3aOptional\u7684\u7c7b\u4f3c\u529f\u80fd\u3002<\/p>\n
Optional<\/span><<\/span>String<\/span>><\/span> a<\/span> =<\/span> Optional<\/span>.<\/span>of<\/span>(<\/span>null<\/span>);<\/span>\r\na<\/span>.<\/span>ifPresent<\/span>(<\/span>notNull<\/span> -><\/span> notNull<\/span>.<\/span>contains<\/span>(<\/span>\"hoge\"<\/span>))<\/span>\r\n<\/code><\/pre>\n
\u6700\u91cd\u8981\u7684Kotlin<\/p>\n
val<\/span> a<\/span>:<\/span> String<\/span>?<\/span> =<\/span> null<\/span>\r\na<\/span>?.<\/span>contains<\/span>(<\/span>\"hoge\"<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u662f\u8c03\u7528\u53ef\u4e3a\u7a7a\u7c7b\u578b\u7684\u51fd\u6570\uff0c\u53ea\u9700\u8981\u50cf?.\u90a3\u6837\u5199\u5373\u53ef\u3002
\n\u5982\u679ca\u4e3aNull\uff0c\u5219\u4e0d\u6267\u884ccontains\u5e76\u4e14\u4ec0\u4e48\u4e5f\u4e0d\u505a\u3002<\/p>\n
\u4e0eJava\u76f8\u6bd4\uff0c\u53ef\u4ee5\u770b\u51faKotlin\u7684\u7f16\u5199\u65b9\u5f0f\u975e\u5e38\u7b80\u6d01\u3002\u800cJava\u53ea\u662f\u5728\u8fd0\u884c\u65f6\u8fdb\u884c\u68c0\u67e5\uff0c\u5373\u4f7f\u4f7f\u7528Java8\u7684Optional\uff0c\u4e5f\u4e0d\u80fd\u89e3\u51b3\u5fd8\u8bb0\u4f7f\u7528Optional\u7684\u6839\u672c\u95ee\u9898\u3002\u800cKotlin\u5728\u7f16\u8bd1\u65f6\u8fdb\u884c\u68c0\u67e5\uff0c\u56e0\u6b64\u4e0d\u4f1a\u51fa\u73b0\u7a7a\u503c\u68c0\u67e5\u7684\u9057\u6f0f\u60c5\u51b5\u3002<\/p>\n
\u5173\u4e8eKotlin\u7684Optional\uff0c\u6709\u8db3\u591f\u7684\u5185\u5bb9\u53ef\u4ee5\u5199\u4e00\u7bc7\u6587\u7ae0\uff0c\u6240\u4ee5\u6211\u5c06\u5b83\u6574\u7406\u5230\u53e6\u4e00\u7bc7\u6587\u7ae0\u4e2d\u3002<\/p>\n
\u3010\u7a7a\u5b89\u5168\u6027\u3011 Kotlin\u4e0eJava\u6bd4\u8f83\u5907\u5fd8\u5f55 \u6b63\u786e\u4f7f\u7528\u7a7a\u5b89\u5168\u7684\u65b9\u6cd5\u3002<\/p>\n
\u51fd\u6570 (\u65b9\u6cd5)<\/p>\n
\u5176\u5b9e\u6211\u4e0d\u592a\u660e\u767d\u51fd\u6570\u548c\u65b9\u6cd5\u7684\u533a\u522b\u3002
\n\u5728\u8fd9\u91cc\uff0c\u4e3a\u65b9\u4fbf\u8d77\u89c1\uff0c\u6211\u7edf\u4e00\u4f7f\u7528\u51fd\u6570\u3002<\/p>\n
\u57fa\u672c\u53e5\u578b<\/p>\n
\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50<\/span> \u623b\u308a\u5024\u578b<\/span> \u95a2\u6570\u540d<\/span>(<\/span>\u5f15\u6570\u578b<\/span> \u5f15\u6570\u540d<\/span>)<\/span> {<\/span>\r\n    \u51e6\u7406<\/span>\r\n}<\/span> \r\n\r\n\/\/ \u4f8b<\/span>\r\npublic<\/span> int<\/span> add<\/span>(<\/span>int<\/span> a<\/span>,<\/span> int<\/span> b<\/span>)<\/span> {<\/span>\r\n    return<\/span> a<\/span> +<\/span> b<\/span>;<\/span>\r\n}<\/span>\r\n\r\n\/\/ \u547c\u3073\u51fa\u3057\u5074<\/span>\r\nadd<\/span>(<\/span>2<\/span>,<\/span> 3<\/span>);<\/span>\r\n<\/code><\/pre>\n
\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50<\/span> fun<\/span> \u95a2\u6570\u540d(\u5f15\u6570\u540d:\u5f15\u6570\u578b):<\/span> \u623b\u308a\u5024\u578b<\/span> {<\/span>\r\n    \u51e6\u7406<\/span>\r\n}<\/span>\r\n\r\n\/\/<\/span> \u4f8b<\/span>\r\nfun<\/span> add<\/span>(<\/span>a<\/span>:<\/span>Int<\/span>,<\/span> b<\/span>:<\/span>Int<\/span>):<\/span> Int<\/span> {<\/span>\r\n    return<\/span> a<\/span> +<\/span> b<\/span>\r\n}<\/span>\r\n\r\n\/\/ \u547c\u3073\u51fa\u3057\u5074<\/span>\r\nadd<\/span>(<\/span>2<\/span>,<\/span> 3<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u5728Kotlin\u4e2d\uff0c\u5982\u679c\u7701\u7565\u4e86\u8bbf\u95ee\u4fee\u9970\u7b26\uff0c\u9ed8\u8ba4\u4e3apublic\u3002<\/p>\n
\u53ef\u53d8\u957f\u5ea6\u53c2\u6570<\/p>\n
public<\/span> int<\/span> sum<\/span>(<\/span>int<\/span>...<\/span> args<\/span>)<\/span> {<\/span>\r\n    int<\/span> sum<\/span> =<\/span> 0<\/span>;<\/span>\r\n    for<\/span> (<\/span>int<\/span> value:<\/span> args<\/span>)<\/span> {<\/span>\r\n        sum<\/span>++<\/span> value<\/span>;<\/span>\r\n    }<\/span>\r\n    return<\/span> sum<\/span>;<\/span>\r\n}<\/span> \r\n<\/code><\/pre>\n
Kotlin\u4e0d\u4f7f\u7528\u4e09\u4e2a\u53e5\u70b9\uff0c\u800c\u662f\u4f7f\u7528\u4fee\u9970\u7b26”vararg”\u3002<\/p>\n
fun<\/span> sum<\/span>(<\/span>vararg<\/span> args<\/span>:<\/span>Int<\/span>)<\/span> {<\/span>\r\n    var<\/span> sum<\/span>:<\/span>Int<\/span> =<\/span> 0<\/span>\r\n    for<\/span> (<\/span>value<\/span>:<\/span>Int<\/span> in<\/span> args<\/span>)<\/span> {<\/span>\r\n        sum<\/span>++<\/span> value<\/span>;<\/span>\r\n    }<\/span>\r\n    return<\/span> sum<\/span>\r\n}<\/span> \r\n<\/code><\/pre>\n
\u5177\u6709\u547d\u540d\u53c2\u6570\u7684\u51fd\u6570<\/p>\n
\u5728Kotlin\u4e2d\uff0c\u8c03\u7528\u51fd\u6570\u65f6\u53ef\u4ee5\u6307\u5b9a\u53c2\u6570\u540d\u79f0\u3002
\n\u4f8b\u5982\uff0c\u5728\u53c2\u6570\u8f83\u591a\u65f6\u7279\u522b\u6709\u6548\u3002<\/p>\n
public<\/span> String<\/span> chaosArguments<\/span>(<\/span>String<\/span> who<\/span>,<\/span> String<\/span> where<\/span>,<\/span> String<\/span> when<\/span>,<\/span> String<\/span> what<\/span>,<\/span> String<\/span> why<\/span>)<\/span> {<\/span>\r\n    return<\/span> when<\/span> +<\/span> \"\u306b\"<\/span> +<\/span> where<\/span> +<\/span> \"\u3067\"<\/span> +<\/span> who<\/span> +<\/span> \"\u304c\"<\/span> +<\/span> what<\/span> +<\/span> \"\u3092\"<\/span> +<\/span> why<\/span> +<\/span> \"\u3060\u304b\u3089\u3057\u305f\"<\/span>;<\/span>\r\n}<\/span>\r\n\r\nchaosArguments<\/span>(<\/span>\"\u30a6\u30e1\u30cf\u30e9\u30ea\u30e5\u30a6\"<\/span>,<\/span> \"\u30ac\u30a4\u30eb\u30b9\u30c6\u30fc\u30b8\"<\/span>,<\/span> \"\u5236\u9650\u6642\u9593\u6b8b\u308a10\u79d2\"<\/span>,<\/span> \"\u6607\u7adc\u62f3\"<\/span>,<\/span> \"\u5c0f\u8db3\u898b\u3066\u304b\u3089\u4f59\u88d5\"<\/span>);<\/span>\r\n\/\/ \u5236\u9650\u6642\u9593\u6b8b\u308a10\u79d2\u306b\u30ac\u30a4\u30eb\u30b9\u30c6\u30fc\u30b8\u3067\u30a6\u30e1\u30cf\u30e9\u30ea\u30e5\u30a6\u304c\u6607\u7adc\u62f3\u3092\u5c0f\u8db3\u898b\u3066\u304b\u3089\u4f59\u88d5\u3060\u304b\u3089\u3057\u305f<\/span>\r\n<\/code><\/pre>\n
\u592a\u96be\u61c2\u4e86\uff01\uff01\u53c2\u6570\u987a\u5e8f\u4e5f\u662f\uff01\u4f8b\u9898\u4e5f\u662f\uff01<\/p>\n
fun<\/span> chaosArguments<\/span>(<\/span>who<\/span>:<\/span>String<\/span>,<\/span> where<\/span>:<\/span>String<\/span>,<\/span> when<\/span>:<\/span>String<\/span>,<\/span> what<\/span>:<\/span>String<\/span>,<\/span> why<\/span>:<\/span>String<\/span>):<\/span> String<\/span> {<\/span>\r\n    return<\/span> \"$when\u306b$where\u3067$who\u304c$what\u3092$why\u3060\u304b\u3089\u3057\u305f\"<\/span>\r\n}<\/span>\r\n\r\nchaosArguments<\/span>(<\/span>\r\nwho<\/span> =<\/span> \"\u30a6\u30e1\u30cf\u30e9\u30ea\u30e5\u30a6\"<\/span>,<\/span>\r\nwhere<\/span> =<\/span> \"\u30ac\u30a4\u30eb\u30b9\u30c6\u30fc\u30b8\"<\/span>,<\/span>\r\nwhen<\/span> =<\/span> \"\u5236\u9650\u6642\u9593\u6b8b\u308a10\u79d2\"<\/span>,<\/span>\r\nwhat<\/span> =<\/span> \"\u6607\u7adc\u62f3\"<\/span>,<\/span>\r\nwhy<\/span> =<\/span> \"\u5c0f\u8db3\u898b\u3066\u304b\u3089\u4f59\u88d5\"<\/span>\r\n)<\/span>\r\n<\/code><\/pre>\n
\u50cf\u8fd9\u6837\uff0c
\n\u53c2\u6570\u540d = \u503c
\n\u53ef\u4ee5\u505a\u5230\u3002
\n\u53ef\u4ee5\u66f4\u6e05\u695a\u5730\u77e5\u9053\u628a\u4f55\u503c\u4f20\u9012\u7ed9\u54ea\u4e2a\u53c2\u6570\u3002<\/p>\n
\u987a\u4fbf\u63d0\u4e00\u4e0b\uff0c\u51fd\u6570\u7684\u53c2\u6570\u540d\u79f0\u4e0d\u5fc5\u6309\u7167\u51fd\u6570\u53c2\u6570\u7684\u5b9a\u4e49\u987a\u5e8f\u3002<\/p>\n
chaosArguments<\/span>(<\/span>\r\nwhere<\/span> =<\/span> \"\u30ac\u30a4\u30eb\u30b9\u30c6\u30fc\u30b8\"<\/span>,<\/span>\r\nwhen<\/span> =<\/span> \"\u5236\u9650\u6642\u9593\u6b8b\u308a10\u79d2\"<\/span>,<\/span>\r\nwho<\/span> =<\/span> \"\u30a6\u30e1\u30cf\u30e9\u30ea\u30e5\u30a6\"<\/span>,<\/span>\r\nwhat<\/span> =<\/span> \"\u6607\u7adc\u62f3\"<\/span>,<\/span>\r\nwhy<\/span> =<\/span> \"\u5c0f\u8db3\u898b\u3066\u304b\u3089\u4f59\u88d5\"<\/span>\r\n)<\/span>\r\n<\/code><\/pre>\n
\u53ef\u4ee5\u7528\u5176\u4ed6\u7684\u65b9\u5f0f\u3002<\/p>\n
\u7c7b\u58f0\u660e<\/p>\n
\u57fa\u672c\u8bed\u6cd5<\/p>\n
public<\/span> class<\/span> ClassName<\/span> {<\/span>\r\n    \/\/ \u30d5\u30a3\u30fc\u30eb\u30c9<\/span>\r\n    private<\/span> int<\/span> param1<\/span>;<\/span>\r\n    private<\/span> String<\/span> param2<\/span>;<\/span>\r\n\r\n    \/\/ \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf<\/span>\r\n    public<\/span> ClassName<\/span>(<\/span>int<\/span> param1<\/span>,<\/span> String<\/span> param2<\/span>)<\/span> {<\/span>\r\n        this<\/span>.<\/span>param1<\/span> =<\/span> param1<\/span>;<\/span>\r\n        this<\/span>.<\/span>param2<\/span> =<\/span> param2<\/span>;<\/span>\r\n    }<\/span>\r\n    \/\/ \u30e1\u30bd\u30c3\u30c9<\/span>\r\n    private<\/span> void<\/span> myMethod<\/span>()<\/span> {<\/span>\r\n        \/\/ \u4f55\u304b\u306e\u51e6\u7406<\/span>\r\n        return<\/span>;<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
class<\/span> ClassName<\/span>(<\/span>private<\/span> val<\/span> param1<\/span>:<\/span> Int<\/span>,<\/span> private<\/span> val<\/span> param2<\/span>:<\/span> String<\/span>)<\/span> {<\/span>\r\n    \/\/ \u30e1\u30bd\u30c3\u30c9<\/span>\r\n    private<\/span> fun<\/span> myMethod<\/span>()<\/span> {<\/span>\r\n        \/\/ \u4f55\u304b\u306e\u51e6\u7406<\/span>\r\n        return<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5728Kotlin\u4e2d\uff0c\u4e0eJava\u4e0d\u540c\u7684\u662f\uff0c\u6784\u9020\u51fd\u6570\u662f\u76f4\u63a5\u5728\u7c7b\u540d\u4e4b\u540e\u5199\u7684\u3002
\n\u636e\u8bf4\u5728Kotlin\u4e2d\u88ab\u79f0\u4e3a\u4e3b\u6784\u9020\u51fd\u6570\u3002
\n\u53c2\u6570\u90e8\u5206\u53ef\u4ee5\u58f0\u660e\u4fee\u9970\u7b26\u3001val\u548cvar\u5c5e\u6027\u3002
\n\u987a\u4fbf\u63d0\u4e00\u4e0b\uff0c\u5982\u679c\u4e3b\u6784\u9020\u51fd\u6570\u4e0d\u5e26\u53c2\u6570\uff0c\u53ef\u4ee5\u7701\u7565\u5982\u4e0b\u3002<\/p>\n
class<\/span> ClassName<\/span>{<\/span>\r\n  \/\/ hogehoge<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u6784\u9020\u51fd\u6570\u7684\u5404\u79cd\u91cd\u8f7d<\/p>\n
\u5982\u679c\u5728\u6784\u9020\u51fd\u6570\u5185\u90e8\u9700\u8981\u8fdb\u884c\u67d0\u4e9b\u5904\u7406<\/p>\n
public<\/span> class<\/span> ClassName<\/span> {<\/span>\r\n    private<\/span> int<\/span> param1<\/span>;<\/span>\r\n    final<\/span> private<\/span> String<\/span> param2<\/span>;<\/span>\r\n\r\n    \/\/ \u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf<\/span>\r\n    public<\/span> ClassName<\/span>(<\/span>int<\/span> param1<\/span>,<\/span> String<\/span> param2<\/span>)<\/span> {<\/span>\r\n        this<\/span>.<\/span>param1<\/span> =<\/span> param1<\/span> +<\/span> 2<\/span>;<\/span>\r\n        this<\/span>.<\/span>param2<\/span> =<\/span> param2<\/span> +<\/span> \"add String\"<\/span>;<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
class<\/span> ClassName<\/span>(<\/span>param1<\/span>:<\/span> Int<\/span>,<\/span> param2<\/span>:<\/span> String<\/span>)<\/span> {<\/span>\r\n    private<\/span> var<\/span> param1<\/span>:<\/span> Int<\/span>\r\n    private<\/span> val<\/span> param2<\/span>:<\/span> String<\/span>\r\n\r\n    init<\/span> {<\/span>\r\n        this<\/span>.<\/span>param1<\/span> =<\/span> param1<\/span> +<\/span> 2<\/span>\r\n        this<\/span>.<\/span>param2<\/span> =<\/span> param2<\/span> +<\/span> \"add String\"<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u5728\u6784\u9020\u51fd\u6570\u4e2d\u4e0d\u76f4\u63a5\u8d4b\u503c\u53c2\u6570\uff0c\u800c\u662f\u8fdb\u884c\u67d0\u79cd\u8ba1\u7b97\u64cd\u4f5c\u7684\u8bdd\uff0c\u53ef\u4ee5\u4f7f\u7528\u521d\u59cb\u5316\u4ee3\u7801\u5757\u6765\u5199\u5165\u3002
\n\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u9700\u8981\u50cfJava\u4e00\u6837\u5728\u9876\u5c42\u58f0\u660e\u53d8\u91cf\u3002<\/p>\n
\u5982\u679c\u9700\u8981\u7f16\u5199\u591a\u4e2a\u6784\u9020\u51fd\u6570\u7684\u8bdd<\/p>\n
public<\/span> class<\/span> ClassName<\/span> {<\/span>\r\n    private<\/span> int<\/span> param1<\/span>;<\/span>\r\n    private<\/span> String<\/span> param2<\/span>;<\/span>\r\n\r\n    public<\/span> ClassName<\/span>(<\/span>int<\/span> param1<\/span>){<\/span>\r\n        this<\/span>.<\/span>param1<\/span> =<\/span> param1<\/span>;<\/span>\r\n        this<\/span>.<\/span>param2<\/span> =<\/span> \"initial\"<\/span>;<\/span>\r\n    }<\/span>\r\n\r\n    public<\/span> ClassName<\/span>(<\/span>int<\/span> param1<\/span>,<\/span> String<\/span> param2<\/span>)<\/span> {<\/span>\r\n        this<\/span>.<\/span>param1<\/span> =<\/span> param1<\/span>;<\/span>\r\n        this<\/span>.<\/span>param2<\/span> =<\/span> param2<\/span>;<\/span>\r\n    }<\/span>\r\n\r\n    public<\/span> ClassName<\/span>(<\/span>int<\/span> param1<\/span>,<\/span> String<\/span> param2<\/span>,<\/span> String<\/span> param3<\/span>)<\/span> {<\/span>\r\n        this<\/span>.<\/span>param1<\/span> =<\/span> param1<\/span>;<\/span>\r\n        this<\/span>.<\/span>param2<\/span> =<\/span> param2<\/span>;<\/span>\r\n        String<\/span> addParam<\/span> =<\/span> param3<\/span>;<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
class<\/span> ClassName<\/span> {<\/span>\r\n    private<\/span> var<\/span> param1<\/span>:<\/span> Int<\/span>\r\n    private<\/span> var<\/span> param2<\/span>:<\/span> String<\/span>\r\n\r\n    constructor<\/span>(<\/span>param1<\/span>:<\/span> Int<\/span>)<\/span> {<\/span>\r\n        this<\/span>.<\/span>param1<\/span> =<\/span> param1<\/span>\r\n        this<\/span>.<\/span>param2<\/span> =<\/span> \"initial\"<\/span>\r\n    }<\/span>\r\n\r\n    constructor<\/span>(<\/span>param1<\/span>:<\/span> Int<\/span>,<\/span> param2<\/span>:<\/span> String<\/span>)<\/span> {<\/span>\r\n        this<\/span>.<\/span>param1<\/span> =<\/span> param1<\/span>\r\n        this<\/span>.<\/span>param2<\/span> =<\/span> param2<\/span>\r\n    }<\/span>\r\n\r\n    constructor<\/span>(<\/span>param1<\/span>:<\/span> Int<\/span>,<\/span> param2<\/span>:<\/span> String<\/span>,<\/span> param3<\/span>:<\/span> String<\/span>)<\/span> {<\/span>\r\n        this<\/span>.<\/span>param1<\/span> =<\/span> param1<\/span>\r\n        this<\/span>.<\/span>param2<\/span> =<\/span> param2<\/span>\r\n        val<\/span> addParam<\/span> =<\/span> param3<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u4f7f\u7528\u6784\u9020\u5757\uff0c\u53ef\u4ee5\u6dfb\u52a0\u65e0\u6570\u4e2a\u3002
\n\u5c06\u4e3b\u6784\u9020\u51fd\u6570\u4ee5\u5916\u7684\u6784\u9020\u51fd\u6570\u79f0\u4e3a\u6b21\u8981\u6784\u9020\u51fd\u6570\u3002
\n\u5982\u4e0a\u6240\u8ff0\uff0c\u53ea\u9700\u8981\u6b21\u8981\u6784\u9020\u51fd\u6570\u4e5f\u53ef\u4ee5\u3002<\/p>\n
\u5728Java\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528super\u5173\u952e\u5b57\u4ece\u6b21\u7ea7\u6784\u9020\u51fd\u6570\u8c03\u7528\u4e3b\u6784\u9020\u51fd\u6570\u3002<\/p>\n
public<\/span> class<\/span> ClassName<\/span> {<\/span>\r\n    private<\/span> int<\/span> param1<\/span>;<\/span>\r\n\r\n    public<\/span> ClassName<\/span>(<\/span>int<\/span> param1<\/span>){<\/span>\r\n        this<\/span>.<\/span>param1<\/span> =<\/span> param1<\/span>;<\/span>\r\n    }<\/span>\r\n\r\n    public<\/span> ClassName<\/span>(<\/span>int<\/span> param1<\/span>,<\/span> String<\/span> param2<\/span>)<\/span> {<\/span>\r\n        this<\/span>(<\/span>param1<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
class<\/span> ClassName<\/span>(<\/span>private<\/span> val<\/span> param1<\/span>:<\/span> Int<\/span>)<\/span> {<\/span>\r\n\r\n    constructor<\/span>(<\/span>param1<\/span>:<\/span> Int<\/span>,<\/span> param2<\/span>:<\/span> String<\/span>)<\/span> :<\/span> this<\/span>(<\/span>param1<\/span>)<\/span> {<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8c03\u7528\u6784\u9020\u51fd\u6570(\u53c2\u6570)\uff1athis(\u53c2\u6570)\u3002<\/p>\n
\u8bbe\u5b9a\u53c2\u6570\u7684\u521d\u59cb\u503c<\/p>\n
\u4f8b\u5982\uff0c\u53ef\u4ee5\u901a\u8fc7\u63d0\u4f9b\u591a\u4e2a\u6784\u9020\u51fd\u6570\u6765\u5b9e\u73b0\u4ee5\u4e0b\u65b9\u5f0f\uff1a\u53ef\u4ee5\u5728param1\u548cparam2\u4e24\u4e2a\u53c2\u6570\u4e2d\u90fd\u4f20\u9012\u53c2\u6570\uff0c\u6216\u8005\u53ea\u4f20\u9012param1\u7684\u53c2\u6570\uff0c\u800cparam2\u5219\u4f7f\u7528\u9ed8\u8ba4\u503c\u3002\u8fd9\u79cd\u5b9e\u73b0\u65b9\u5f0f\u5728Android\u4e2d\u7ecf\u5e38\u770b\u5230\u3002\u5728Kotlin\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u975e\u5e38\u7b80\u5355\u7684\u8bed\u53e5\u6765\u5b9e\u73b0\u8fd9\u4e00\u70b9\u3002<\/p>\n
public<\/span> class<\/span> ClassName<\/span> {<\/span>\r\n    private<\/span> int<\/span> param1<\/span>;<\/span>\r\n    private<\/span> String<\/span> param2<\/span>;<\/span>\r\n\r\n    public<\/span> ClassName<\/span>(<\/span>int<\/span> param1<\/span>){<\/span>\r\n        this<\/span>(<\/span>param1<\/span>,<\/span> \"initialize\"<\/span>);<\/span>\r\n    }<\/span>\r\n\r\n    public<\/span> ClassName<\/span>(<\/span>int<\/span> param1<\/span>,<\/span> String<\/span> param2<\/span>)<\/span> {<\/span>\r\n        this<\/span>.<\/span>param1<\/span> =<\/span> param1<\/span>;<\/span>\r\n        this<\/span>.<\/span>param2<\/span> =<\/span> param2<\/span>;<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
class<\/span> ClassName<\/span> @JvmOverloads<\/span> constructor<\/span>(<\/span>private<\/span> val<\/span> param1<\/span>:<\/span> Int<\/span>,<\/span> private<\/span> val<\/span> param2<\/span>:<\/span> String<\/span> =<\/span> \"initialize\"<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u592a\u5389\u5bb3\u4e86\uff01\u53ea\u9700\u8981\u4e00\u884c\u4ee3\u7801\u5c31\u53ef\u4ee5\u63cf\u8ff0\u51fa\u6765\uff01\u901a\u8fc7\u5c06\u53c2\u6570\u8bbe\u7f6e\u4e3a \u53d8\u91cf:\u7c7b\u578b = \u521d\u59cb\u503c \uff0c\u53ef\u4ee5\u6307\u5b9a\u5728\u6ca1\u6709\u7ed9\u5b9a\u53c2\u6570\u7684\u60c5\u51b5\u4e0b\u7684\u521d\u59cb\u503c\u3002
\n\u7531\u4e8eJava\u6ca1\u6709\u8fd9\u6837\u7684\u529f\u80fd\uff0c\u53ef\u4ee5\u4f7f\u7528\u540d\u4e3a @JvmOverloads \u7684\u6ce8\u89e3\u6765\u89e3\u51b3\u3002<\/p>\n
\u5982\u679c\u4f60\u60f3\u5728Android\u4e0a\u521b\u5efa\u81ea\u5b9a\u4e49\u89c6\u56fe\u7684\u8bdd<\/p>\n
public<\/span> class<\/span> CustomView<\/span> extends<\/span> View<\/span> {<\/span>\r\n    public<\/span> CustomView<\/span>(<\/span>Context<\/span> context<\/span>)<\/span> {<\/span>\r\n        super<\/span>(<\/span>context<\/span>);<\/span>\r\n    }<\/span>\r\n\r\n    public<\/span> CustomView<\/span>(<\/span>Context<\/span> context<\/span>,<\/span> AttributeSet<\/span> attrs<\/span>)<\/span> {<\/span>\r\n        super<\/span>(<\/span>context<\/span>,<\/span> attrs<\/span>);<\/span>\r\n    }<\/span>\r\n\r\n    public<\/span> CustomView<\/span>(<\/span>Context<\/span> context<\/span>,<\/span> AttributeSet<\/span> attrs<\/span>,<\/span> int<\/span> defStyleAttr<\/span>)<\/span> {<\/span>\r\n        super<\/span>(<\/span>context<\/span>,<\/span> attrs<\/span>,<\/span> defStyleAttr<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
class<\/span> CustomView<\/span> :<\/span> View<\/span> {<\/span>\r\n    @JvmOverloads<\/span> constructor<\/span>(<\/span>context<\/span>:<\/span> Context<\/span>,<\/span> attrs<\/span>:<\/span> AttributeSet<\/span>?<\/span> =<\/span> null<\/span>,<\/span> style<\/span>:<\/span> Int<\/span> =<\/span> 0<\/span>)<\/span> :<\/span> super<\/span>(<\/span>context<\/span>,<\/span> attrs<\/span>,<\/span> style<\/span>)<\/span> {<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u7528\u8fd9\u6837\u8d85\u7ea7\u7b80\u5355\u7684\u63cf\u8ff0\u5c31\u80fd\u6210\u529f\u3002\u592a\u68d2\u4e86\uff01\uff01<\/p>\n
\u6b64\u5916\uff0c\u4e3b\u8981\u6784\u9020\u51fd\u6570\u662f<\/p>\n
\u7c7b ClassName\uff08val param1: Int\uff09{…} \u7684\u6c49\u8bed\u672c\u5730\u5316\u8868\u8fbe:
\nclass ClassName\uff08\u53c2\u65701: Int\uff09{…}<\/p>\n
\u5199\u4ee3\u7801\u65f6\u901a\u5e38\u4f1a\u7528\u5230\u7b80\u5199\u6cd5\uff0c\u4f8b\u5982\u6dfb\u52a0\u6ce8\u91ca\u6216\u8bbf\u95ee\u4fee\u9970\u7b26\u7b49\uff0c\u5219\u9700\u8981\u6b63\u786e\u4f7f\u7528\u3002<\/p>\n
\u7c7b ClassName public @annotation constructor(val param1: Int){…}<\/p>\n
\u7c7b ClassName public @annotation constructor(val param1: Int){…} \u53ef\u4ee5\u88ab\u6539\u5199\u4e3a\uff1a<\/p>\n
\u5fc5\u987b\u5199\u3002<\/p>\n
\u7c7b\u7684\u7ee7\u627f  de<\/p>\n
\u57fa\u672c\u7684\u8bed\u6cd5\u7ed3\u6784<\/p>\n
\/\/ \u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9<\/span>\r\npublic<\/span> class<\/span> Human<\/span> {<\/span>\r\n    private<\/span> String<\/span> sex<\/span>;<\/span>\r\n    public<\/span> Human<\/span>(<\/span>String<\/span> sex<\/span>)<\/span> {<\/span>\r\n        this<\/span>.<\/span>sex<\/span> =<\/span> sex<\/span>;<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\/\/ \u30b5\u30d6\u30af\u30e9\u30b9<\/span>\r\npublic<\/span> class<\/span> Hero<\/span> extends<\/span> Human<\/span> {<\/span>\r\n\r\n    public<\/span> Hero<\/span>(<\/span>String<\/span> sex<\/span>)<\/span> {<\/span>\r\n        super<\/span>(<\/span>sex<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span> \r\n<\/code><\/pre>\n
\/\/ \u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9<\/span>\r\nopen<\/span> class<\/span> Human<\/span>(<\/span>private<\/span> var<\/span> sex<\/span>:<\/span> String<\/span>)<\/span>\r\n\/\/ \u30b5\u30d6\u30af\u30e9\u30b9<\/span>\r\nclass<\/span> Hero<\/span>(<\/span>sex<\/span>:<\/span> String<\/span>)<\/span> :<\/span> Human<\/span>(<\/span>sex<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u5728\u7c7b\u540d\u540e\u9762\u52a0\u4e0a\u5192\u53f7\u5e76\u6307\u5b9a\u8d85\u7c7b\u540d\u3002
\n\u5982\u679c\u8d85\u7c7b\u6709\u4e3b\u6784\u9020\u51fd\u6570\uff0c\u5219\u5728\u7ee7\u627f\u65f6\u5fc5\u987b\u8fdb\u884c\u521d\u59cb\u5316\u3002<\/p>\n
\u5f00\u653e\u4fee\u9970\u7b26<\/p>\n
\u5c31Java\u800c\u8a00\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u53ef\u4ee5\u5728\u6ca1\u6709\u4efb\u4f55\u7279\u522b\u64cd\u4f5c\u7684\u60c5\u51b5\u4e0b\u7ee7\u627f\u7c7b\uff0c\u4f46\u662fKotlin\u4e2d\u6ca1\u6709\u7528open\u4fee\u9970\u7684\u7c7b\u65e0\u6cd5\u88ab\u7ee7\u627f\u3002
\n\u6362\u53e5\u8bdd\u8bf4\uff0cKotlin\u7684\u7c7b\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u76f8\u5f53\u4e8eJava\u4e2d\u7684final class\u3002
\n\u4f3c\u4e4e\u662f\u8981\u963b\u6b62\u8fc7\u5ea6\u4fbf\u5229\u7684\u7ee7\u627f\u3002<\/p>\n
\u5185\u90e8\u7c7b<\/p>\n
\u57fa\u672c\u8bed\u6cd5\u7ed3\u6784<\/p>\n
public<\/span> class<\/span> Hero<\/span> {<\/span>\r\n    private<\/span> String<\/span> name<\/span> =<\/span> \"\u307e\u3055\u304a\"<\/span>;<\/span>\r\n\r\n    private<\/span> void<\/span> action<\/span>()<\/span> {<\/span>\r\n        \/\/\u30a4\u30f3\u30ca\u30fc\u30af\u30e9\u30b9\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3084\u30e1\u30bd\u30c3\u30c9\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3059\u308c\u3070\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3002<\/span>\r\n        Equipment<\/span> eq<\/span> =<\/span> new<\/span> Equipment<\/span>();<\/span>\r\n        eq<\/span>.<\/span>specialAction<\/span>();<\/span>\r\n    }<\/span>\r\n    \/\/ \u30a4\u30f3\u30ca\u30fc\u30af\u30e9\u30b9<\/span>\r\n    public<\/span> class<\/span> Equipment<\/span> {<\/span>\r\n        private<\/span> String<\/span> sword<\/span> =<\/span> \"\u6728\u306e\u68d2\"<\/span>;<\/span>\r\n\r\n        private<\/span> void<\/span> specialAction<\/span>()<\/span> {<\/span>\r\n            \/\/ \u30a2\u30a6\u30bf\u30fc\u30af\u30e9\u30b9\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3057\u306a\u304f\u3066\u3082\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\u3002<\/span>\r\n            String<\/span> owner<\/span> =<\/span> name<\/span>;<\/span>\r\n            action<\/span>();<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
class<\/span> Hero<\/span> {<\/span>\r\n    private<\/span> val<\/span> name<\/span>:<\/span> String<\/span>?<\/span> =<\/span> \"\u307e\u3055\u304a\"<\/span>\r\n\r\n    private<\/span> fun<\/span> action<\/span>()<\/span> {<\/span>\r\n\u3000\u3000\u3000\u3000<\/span> \/\/ \u3053\u3053\u306fJava\u3068\u540c\u3058<\/span>\r\n        val<\/span> eq<\/span> =<\/span> Equipment<\/span>()<\/span>\r\n        eq<\/span>.<\/span>specialAction<\/span>()<\/span>\r\n    }<\/span>\r\n\r\n    inner<\/span> class<\/span> Equipment<\/span> {<\/span>\r\n        private<\/span> val<\/span> sword<\/span>:<\/span> String<\/span> =<\/span> \"\u6728\u306e\u68d2\"<\/span>\r\n\r\n        \/\/ \u30a2\u30a6\u30bf\u30fc\u30af\u30e9\u30b9\u304b\u3089\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\u306b\u306f\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\u304cinternal\u304bpublic\u3058\u3083\u306a\u3044\u3068\u3044\u3051\u306a\u3044<\/span>\r\n        internal<\/span> fun<\/span> specialAction<\/span>()<\/span> {<\/span>\r\n            val<\/span> owner<\/span> =<\/span> name<\/span>\r\n            action<\/span>()<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5185\u90e8\u7c7b\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u8fdb\u884c\u5b9a\u4e49\uff1a
\n\u5185\u90e8\u7c7bInnerClassName{}<\/p>\n
Java\u548cKotlin\u6709\u6240\u4e0d\u540c\u7684\u5730\u65b9\u5728\u4e8e\uff0cJava\u4e2d\u4ece\u5916\u90e8\u7c7b\u53ef\u4ee5\u8bbf\u95ee\u5185\u90e8\u7c7b\u7684\u79c1\u6709\u65b9\u6cd5\uff0c\u4f46\u5728Kotlin\u4e2d\uff0c\u5982\u679c\u65b9\u6cd5\u88ab\u6807\u8bb0\u4e3a\u79c1\u6709(private)\uff0c\u5219\u65e0\u6cd5\u8bbf\u95ee\u3002\u5fc5\u987b\u4f7f\u7528internal\u8fd9\u4e2a\u8bbf\u95ee\u4fee\u9970\u7b26\u3002<\/p>\n
\u6307\u5b9athis\u7684\u5b9e\u4f8b<\/p>\n
\u5982\u679c\u60f3\u8981\u4ece\u5185\u90e8\u7c7b\u6307\u5b9a\u5916\u90e8\u7c7b\u7684\u5b9e\u4f8b\uff0c\u7528Java\u7684\u5199\u6cd5\u4f1a\u6709\u6240\u4e0d\u540c\u3002<\/p>\n
public<\/span> class<\/span> Hero<\/span> {<\/span>\r\n\r\n    public<\/span> class<\/span> Equipment<\/span> {<\/span>\r\n            Hero<\/span> hero<\/span> =<\/span> Hero<\/span>.<\/span>this<\/span>;<\/span>\r\n            Equipment<\/span> eq<\/span> =<\/span> this<\/span>;<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
class<\/span> Hero<\/span> {<\/span>\r\n\r\n    inner<\/span> class<\/span> Equipment<\/span> {<\/span>\r\n            val<\/span> hero<\/span> =<\/span> this<\/span>@Hero<\/span>\r\n\r\n            val<\/span> eq1<\/span> =<\/span> this<\/span>@Equipment<\/span>\r\n            val<\/span> eq2<\/span>=<\/span> this<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5728Java\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528”\u5916\u90e8\u7c7b\u540d.this”\u6765\u83b7\u53d6\u5916\u90e8\u7c7b\u7684\u5b9e\u4f8b\u3002
\n\u5728Kotlin\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528”this@\u7c7b\u540d”\u6765\u6307\u5b9a\u83b7\u53d6\u6307\u5b9a\u7c7b\u7684\u5b9e\u4f8b\u3002<\/p>\n
\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c”this@Equipment”\u548c”this”\u662f\u76f8\u540c\u7684\u3002<\/p>\n
\u5c5e\u6027<\/p>\n
\u8bf4\u5230Java\u4e2d\u6700\u65e0\u804a\u7684\u4ee3\u7801\uff0c\u90a3\u5c31\u662fgetter\u548csetter\u3002
\n\u4f46\u5982\u679c\u662f\u7528Kotlin\u7684\u8bdd\uff0c\u8fd9\u4e2a\u95ee\u9898\u5c31\u4f1a\u6709\u70ab\u9177\u7684\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n
\u57fa\u672c\u8a9e\u6cd5\u7ed3\u6784<\/p>\n
public<\/span> class<\/span> ClassName<\/span> {<\/span>\r\n    \/\/ \u3053\u308c\u306f\u30d5\u30a3\u30fc\u30eb\u30c9<\/span>\r\n    private<\/span> int<\/span> param<\/span> =<\/span> 0<\/span>;<\/span>\r\n\r\n    \/\/ \u3053\u308c\u306f\u30a2\u30af\u30bb\u30b5<\/span>\r\n    public<\/span> int<\/span> getParam<\/span>()<\/span> {<\/span>\r\n        return<\/span> param<\/span>;<\/span>\r\n    }<\/span>\r\n    \/\/ \u3053\u308c\u3082\u30a2\u30af\u30bb\u30b5<\/span>\r\n    public<\/span> void<\/span> setParam<\/span>(<\/span>int<\/span> mParam<\/span>)<\/span> {<\/span>\r\n        param<\/span> =<\/span> mParam<\/span>;<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
class<\/span> Hero<\/span> {<\/span>\r\n    \/\/ \u3053\u308c\u306f\u30d5\u30a3\u30fc\u30eb\u30c9\u3067\u306f\u306a\u304f\u30d7\u30ed\u30d1\u30c6\u30a3 \u5185\u90e8\u7684\u306b\u30a2\u30af\u30bb\u30b5\u304c\u751f\u6210\u3055\u308c\u308b<\/span>\r\n    var<\/span> param<\/span> =<\/span> 0<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u53ea\u9700\u8981\u4e00\u4e2a\u9009\u9879-\u7528\u4e2d\u6587\u5bf9\u4ee5\u4e0b\u5185\u5bb9\u8fdb\u884c\u91ca\u4e49\uff1a
\n\u5176\u5b9e\uff0c\u5728Kotlin\u4e2d\u5e76\u4e0d\u5b58\u5728\u5b57\u6bb5\uff08field\uff09\u8fd9\u4e2a\u6982\u5ff5\uff0c\u8868\u9762\u4e0a\u770b\u8d77\u6765\u50cf\u662f\u5b57\u6bb5\u7684\u4e1c\u897f\u5b9e\u9645\u4e0a\u88ab\u79f0\u4e3a\u5c5e\u6027\uff08property\uff09\u3002
\n\u5728Kotlin\u4e2d\uff0c\u58f0\u660e\u5c5e\u6027\u65f6\u4f1a\u5728\u5185\u90e8\u81ea\u52a8\u751f\u6210\u8bbf\u95ee\u5668\uff08accessor\uff09\u3002
\n\u5373\u4f7f\u4e0d\u81ea\u5df1\u521b\u5efagetter\/setter\uff0c\u4e5f\u53ef\u4ee5\u901a\u8fc7\u8bbf\u95ee\u5668\u8fdb\u884c\u5f15\u7528\u3002<\/p>\n
\u5982\u679c\u4f7f\u7528val\u8fdb\u884c\u53d8\u91cf\u5b9a\u4e49\uff0c\u90a3\u4e48\u663e\u7136\u65e0\u6cd5\u4f7f\u7528setter\u3002<\/p>\n
\u81ea\u5b9a\u4e49\u7684getter\/setter<\/p>\n
\u4e5f\u53ef\u4ee5\u81ea\u5df1\u5b9a\u4e49getter\/setter\u65b9\u6cd5\u3002<\/p>\n
public<\/span> class<\/span> ClassName<\/span> {<\/span>\r\n    private<\/span> int<\/span> param<\/span> =<\/span> 0<\/span>;<\/span>\r\n    \/\/ \u7d76\u5bfe\u5024\u3067\u8fd4\u3059<\/span>\r\n    public<\/span> int<\/span> getParam<\/span>()<\/span> {<\/span>\r\n        return<\/span> Math<\/span>.<\/span>abs<\/span>(<\/span>param<\/span>);<\/span>\r\n    }<\/span>\r\n    \/\/ \u7d76\u5bfe\u5024\u3092\u8a2d\u5b9a\u3059\u308b<\/span>\r\n    public<\/span> void<\/span> setParam<\/span>(<\/span>int<\/span> mParam<\/span>)<\/span> {<\/span>\r\n        param<\/span> =<\/span> Math<\/span>.<\/span>abs<\/span>(<\/span>mParam<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
class<\/span> ClassName<\/span> {<\/span>\r\n    var<\/span> param<\/span> =<\/span> 0<\/span>\r\n        get<\/span>(){<\/span>\r\n            return<\/span> Math<\/span>.<\/span>abs<\/span>(<\/span>param<\/span>)<\/span>\r\n        }<\/span>\r\n        \/\/set()\u306e\u5f15\u6570\u540d\u306f\u6163\u4f8b\u7684\u306bvalue\u306b\u3059\u308b\u3088\u3046\u3060<\/span>\r\n        set<\/span>(<\/span>value<\/span>)<\/span> {<\/span>\r\n            field<\/span> =<\/span> Math<\/span>.<\/span>abs<\/span>(<\/span>value<\/span>)<\/span>\r\n        }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4e0d\u4f1a\u5185\u90e8\u521b\u5efa\u8bbf\u95ee\u5668\u3002
\n\u5728\u81ea\u5b9a\u4e49setter\u4e2d\u51fa\u73b0\u7684field\u88ab\u79f0\u4e3abacking field\uff0c\u5b83\u4f1a\u81ea\u52a8\u5b9a\u4e49\u7528\u4e8e\u5f15\u7528\u5c5e\u6027\u503c\u7684\u65f6\u5019\u3002<\/p>\n
For example<\/p>\n
var<\/span> param<\/span> =<\/span> 0<\/span>\r\n        \/\/\u30d0\u30c3\u30ad\u30f3\u30b0\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u4f7f\u308f\u306a\u3044\u4f8b\u3002\u5faa\u74b0\u53c2\u7167\u306b\u306a\u3063\u3066\u843d\u3061\u308b\u3002<\/span>\r\n        set<\/span>(<\/span>value<\/span>)<\/span> {<\/span>\r\n            param<\/span> =<\/span> Math<\/span>.<\/span>abs<\/span>(<\/span>value<\/span>)<\/span>\r\n        }<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u521b\u5efa\u8fd9\u6837\u7684\u5b9a\u5236setter\uff0c\u5c06\u5bfc\u81f4\u5728\u5b9a\u5236setter\u4e2d\u518d\u6b21\u8c03\u7528param\u7684setter\uff0c\u4ece\u800c\u5bfc\u81f4\u5faa\u73af\u5f15\u7528\u3002
\nparam = Math.abs(value)
\n\u6ce8\u610f\uff0c\u8fd9\u4e0d\u662f\u5c06Math.abs(value)\u7684\u503c\u8d4b\u7ed9param\uff0c\u800c\u662f\u5c06Math.abs(value)\u4f5c\u4e3aparam\u7684setter\u53c2\u6570\u4f20\u5165\u5e76\u8c03\u7528\u5b83\u7684\u610f\u601d\u3002<\/p>\n
\u91cd\u5199<\/p>\n
\u5c5e\u6027\u4e5f\u53ef\u4ee5\u88ab\u8986\u76d6\u3002
\n\u88ab\u8986\u76d6\u7684\u5c5e\u6027\u9700\u8981\u50cf\u7c7b\u4e00\u6837\u4f7f\u7528open\u4fee\u9970\u7b26\u3002<\/p>\n
Java\u7684\u5b57\u6bb5\u5c06\u9690\u85cf\u800c\u4e0d\u662f\u91cd\u5199\u3002
\n\u53c2\u8003\uff1ahttp:\/\/log.nissuk.info\/2012\/03\/java.html<\/p>\n
class<\/span> SubClass<\/span> :<\/span> SuperClass<\/span>()<\/span> {<\/span>\r\n    override<\/span> var<\/span> param<\/span> =<\/span> \"sub\"<\/span>\r\n    get<\/span>()<\/span> =<\/span> \"override\"<\/span>\r\n}<\/span>\r\n\r\nopen<\/span> class<\/span> SuperClass<\/span> {<\/span>\r\n    open<\/span> var<\/span> param<\/span> =<\/span> \"super\"<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4e0d\u4ec5\u53ef\u4ee5\u8bbe\u7f6e\u503c\uff0c\u8fd8\u53ef\u4ee5\u91cd\u5199getter\/setter\u3002\u5f53\u7136\uff0c\u5982\u679c\u4ece\u5b50\u7c7b\u4e2d\u8bbf\u95eeparam\uff0c\u5c06\u8fd4\u56de\u5b57\u7b26\u4e32”override”\u3002<\/p>\n
\u9759\u6001\u5b57\u6bb5<\/p>\n
\u5728Kotlin\u4e2d\uff0c\u4e0d\u5b58\u5728Static\u7684\u6982\u5ff5\u3002\u5982\u679c\u60f3\u8981\u5904\u7406\u7c7b\u4f3c\u4e8eJava\u4e2d\u7684Static\u5b57\u6bb5\u7684\u60c5\u51b5\uff0c\u53ef\u4ee5\u4f7f\u7528”companion object”\u8fd9\u4e2a\u5355\u4f8b\u5bf9\u8c61\u3002<\/p>\n
public<\/span> class<\/span> ClassName<\/span> {<\/span>\r\n    public<\/span> static<\/span> final<\/span> int<\/span> STATIC_VALUE<\/span> =<\/span> 1<\/span>;<\/span>\r\n    public<\/span> static<\/span> final<\/span> \r\n\r\n}<\/span>\r\n<\/code><\/pre>\n
class<\/span> ClassName<\/span> {<\/span>\r\n    companion<\/span> object<\/span> {<\/span>\r\n      @JvmField<\/span> val<\/span> STATIC_VALUE<\/span> =<\/span> 1<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
@JvmField\u8fd9\u4e2a\u6ce8\u89e3\u5728\u4eceJava\u7aef\u8c03\u7528\u65f6\uff0c\u4e0d\u9700\u8981\u901a\u8fc7companion object\u6765\u8c03\u7528\u3002<\/p>\n
\u5982\u679c\u6ca1\u6709@JvmField\uff0c\u8bbf\u95eeKotlin\u7684STATIC_VALUE\u7684\u65b9\u6cd5\u662f\u4ec0\u4e48\uff1f<\/p>\n
int<\/span> value<\/span> =<\/span> ClassName<\/span>.<\/span>Companion<\/span>.<\/span>getSTATIC_VALUE<\/span>();<\/span>\r\n<\/code><\/pre>\n
\u7136\u800c\uff0c\u5bf9\u4e8e\u6807\u6709@JvmField\u6ce8\u89e3\u7684\u5c5e\u6027\u6765\u8bf4\uff0c\u60c5\u51b5\u4f1a\u6709\u6240\u4e0d\u540c\u3002<\/p>\n
int<\/span> value<\/span> =<\/span> ClassName<\/span>.<\/span>STATIC_VALUE<\/span>;<\/span>\r\n<\/code><\/pre>\n
\u53ef\u4ee5\u4ee5\u4e0eJava\u7684static\u5b57\u6bb5\u76f8\u540c\u7684\u65b9\u5f0f\u8bbf\u95ee\u3002<\/p>\n
\u6b64\u5916\uff0cJava\u7684\u57fa\u672c\u7c7b\u578b\u548c\u5b57\u7b26\u4e32\u7c7b\u578b\u8fd8\u6709\u4e00\u4e2a\u53eb\u505aconst\u7684\u4fee\u9970\u7b26\u3002<\/p>\n
static<\/span> final<\/span> int<\/span> HOGE<\/span> =<\/span> 0<\/span>;<\/span>\r\nstatic<\/span> final<\/span> List<\/span><<\/span>String<\/span>><\/span> FUGA<\/span> =<\/span> new<\/span> ArrayList<\/span><>();<\/span>\r\n<\/code><\/pre>\n
companion<\/span> object<\/span> {<\/span>\r\n  const<\/span> val<\/span> HOGE<\/span> =<\/span> 0<\/span>\r\n  const<\/span> val<\/span> FUGA<\/span> =<\/span> ArrayList<\/span><<\/span>String<\/span>>()<\/span> \/\/ \u3053\u308c\u306f\u30c0\u30e1\u3002<\/span>\r\n  @JvmField<\/span> val<\/span> FUGA<\/span> =<\/span> ArrayList<\/span><<\/span>String<\/span>>()<\/span> \/\/ \u3053\u308c\u306fOK\u3002<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u867d\u7136\u6211\u4e0d\u592a\u6e05\u695aconst\u548c@JvmField\u4e4b\u95f4\u7684\u533a\u522b\uff0c\u4f46\u6839\u636e\u9605\u8bfb\u8fd9\u7bc7\u6587\u7ae0\u7684\u611f\u89c9\uff0c\u5b83\u4eec\u5728\u539f\u59cb\u7c7b\u578b\u4e0a\u4f3c\u4e4e\u6ca1\u6709\u5dee\u5f02\u3002
\nconst\u548c@JvmField\u4e4b\u95f4\u7684\u5dee\u5f02\u4f3c\u4e4e\u4e0e\u7f16\u8bd1\u540e\u7684\u884c\u4e3a\u6709\u5173\u3002<\/p>\n
const\u7528\u4e8e\u5728\u5b57\u6bb5\u4e0a\u5b9a\u4e49\u521d\u59cb\u503c\uff0c\u800c@JvmField\u7528\u4e8e\u5728\u9759\u6001\u6784\u9020\u51fd\u6570\u4e2d\u5b9a\u4e49\u521d\u59cb\u503c\u3002<\/p>\n
\u8bd5\u8bd5\u770b\u628a\u4ee5\u4e0b\u4ee3\u7801\u8f6c\u5316\u4e3a\u5b57\u8282\u7801\u6765\u67e5\u770b\u3002<\/p>\n
class<\/span> A<\/span> {<\/span>\r\n    companion<\/span> object<\/span> {<\/span>\r\n        const<\/span> val<\/span> a<\/span> =<\/span> 12<\/span>\r\n        @JvmField<\/span> val<\/span> b<\/span> =<\/span> 12<\/span>\r\n        @JvmField<\/span> val<\/span> c<\/span> =<\/span> Date<\/span>()<\/span> \/\/ \u975e\u30d7\u30ea\u30df\u30c6\u30a3\u30d6<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\/\/ access flags 0x19<\/span>\r\n  public<\/span> final<\/span> static<\/span> I<\/span> a<\/span> =<\/span> 12<\/span>\r\n\r\n  \/\/ access flags 0x19<\/span>\r\n  public<\/span> final<\/span> static<\/span> I<\/span> b<\/span> =<\/span> 12<\/span>\r\n  @Lkotlin<\/span>\/<\/span>jvm<\/span>\/<\/span>JvmField<\/span>;()<\/span> \/\/ invisible<\/span>\r\n\r\n  \/\/ access flags 0x19<\/span>\r\n  public<\/span> final<\/span> static<\/span> Ljava<\/span>\/<\/span>util<\/span>\/<\/span>Date<\/span>;<\/span> c<\/span>\r\n  @Lkotlin<\/span>\/<\/span>jvm<\/span>\/<\/span>JvmField<\/span>;()<\/span> \/\/ invisible<\/span>\r\n  @Lorg<\/span>\/<\/span>jetbrains<\/span>\/<\/span>annotations<\/span>\/<\/span>NotNull<\/span>;()<\/span> \/\/ invisible<\/span>\r\n\r\n  \/\/ access flags 0x8<\/span>\r\n  static<\/span> <<\/span>clinit<\/span>>()<\/span>V<\/span>\r\n    NEW<\/span> com<\/span>\/<\/span>hoge<\/span>\/<\/span>A<\/span>$Companion<\/span>\r\n    DUP<\/span>\r\n    ACONST_NULL<\/span>\r\n    INVOKESPECIAL<\/span> com<\/span>\/<\/span>hoge<\/span>\/<\/span>A<\/span>$Companion<\/span>.<<\/span>init<\/span>><\/span> (<\/span>Lkotlin<\/span>\/<\/span>jvm<\/span>\/<\/span>internal<\/span>\/<\/span>DefaultConstructorMarker<\/span>;)<\/span>V<\/span>\r\n    PUTSTATIC<\/span> com<\/span>\/<\/span>hoge<\/span>\/<\/span>A<\/span>.<\/span>Companion<\/span> :<\/span> Lcom<\/span>\/<\/span>hoge<\/span>\/<\/span>A<\/span>$Companion<\/span>;<\/span>\r\n   L0<\/span>\r\n    LINENUMBER<\/span> 12<\/span> L0<\/span>\r\n    BIPUSH<\/span> 12<\/span>\r\n    PUTSTATIC<\/span> com<\/span>\/<\/span>hoge<\/span>\/<\/span>A<\/span>.<\/span>b<\/span> :<\/span> I<\/span>\r\n   L1<\/span>\r\n    LINENUMBER<\/span> 13<\/span> L1<\/span>\r\n    NEW<\/span> java<\/span>\/<\/span>util<\/span>\/<\/span>Date<\/span>\r\n    DUP<\/span>\r\n    INVOKESPECIAL<\/span> java<\/span>\/<\/span>util<\/span>\/<\/span>Date<\/span>.<<\/span>init<\/span>><\/span> ()<\/span>V<\/span>\r\n    PUTSTATIC<\/span> com<\/span>\/<\/span>hoge<\/span>\/<\/span>A<\/span>.<\/span>c<\/span> :<\/span> Ljava<\/span>\/<\/span>util<\/span>\/<\/span>Date<\/span>;<\/span>\r\n    RETURN<\/span>\r\n    MAXSTACK<\/span> =<\/span> 3<\/span>\r\n    MAXLOCALS<\/span> =<\/span> 0<\/span>\r\n<\/code><\/pre>\n
\u603b\u7ed3\u8d77\u6765\u5c31\u662f\u8fd9\u4e2a\u6837\u5b50\u3002<\/p>\n
\n
\n\n\n\u521d\u671f\u5316\u306e\u30bf\u30a4\u30df\u30f3\u30b0<\/th>\nconst<\/th>\n\n@JvmField<\/a>(\u30d7\u30ea\u30df\u30c6\u30a3\u30d6)<\/th>\n\u3000@JvmField<\/a>(\u975e\u30d7\u30ea\u30df\u30c6\u30a3\u30d6)<\/th>\n<\/tr>\n<\/thead>\n\n\n\u30d5\u30a3\u30fc\u30eb\u30c9\u5b9a\u7fa9<\/td>\n\u25cb<\/td>\n\u25cb<\/td>\n\u00d7<\/td>\n<\/tr>\n\nstatic\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf<\/td>\n\u00d7<\/td>\n\u25cb<\/td>\n\u25cb<\/td>\n<\/tr>\n<\/tbody>\n
\u5982\u679c\u4f7f\u7528@JvmField\u6765\u5b9a\u4e49\u539f\u59cb\u7c7b\u578b\uff0c\u4f1a\u5bfc\u81f4\u4e24\u6b21\u8d4b\u4e88\u521d\u59cb\u503c\uff0c\u56e0\u6b64\u6700\u597d\u5c06\u539f\u59cb\u7c7b\u578b\u5b9a\u4e49\u4e3aconst\uff0c\u975e\u539f\u59cb\u7c7b\u578b\u5b9a\u4e49\u4e3a@JvmField\u3002<\/p>\n
\u6392\u5217<\/p>\n
\u4e8b\u5148\u4ec5\u58f0\u660e\u53d8\u91cf\uff0c\u5e76\u7a0d\u540e\u5c06\u5b9e\u4f53\u8d4b\u503c\u7ed9\u5b83\u3002<\/p>\n
String<\/span>[]<\/span> a<\/span>;<\/span>\r\na<\/span> =<\/span> new<\/span> String<\/span>[<\/span>5<\/span>];<\/span>\r\n<\/code><\/pre>\n
var<\/span> a<\/span>:<\/span> Array<\/span><<\/span>String<\/span>?<\/span>><\/span>\r\na<\/span> =<\/span> arrayOfNulls<\/span><<\/span>String<\/span>>(<\/span>5<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u5728Kotlin\u4e2d\uff0c\u5982\u679c\u5728\u8d4b\u503c\u65f6\u4e0d\u660e\u786e\u5728\u7c7b\u578b\u540e\u9762\u52a0\u4e0a?\uff0c\u90a3\u4e48\u4e0d\u5141\u8bb8\u4e3a\u7a7a\u503c\uff0c\u56e0\u6b64\u9700\u8981\u4f7f\u7528Array\u3002
\n\u53ef\u4ee5\u4f7f\u7528arrayOfNulls<\u7c7b\u578b>()\u6765\u521b\u5efa\u4e00\u4e2a\u5185\u90e8\u4e3a\u7a7a\u503c\u7684\u6570\u7ec4\u3002<\/p>\n
\u540c\u65f6\u5b9a\u4e49\u53d8\u91cf\u548c\u5b9e\u4f53<\/p>\n
String<\/span>[]<\/span> a<\/span> =<\/span> new<\/span> String<\/span>[<\/span>5<\/span>];<\/span>\r\n<\/code><\/pre>\n
var<\/span> a<\/span> =<\/span> arrayOfNulls<\/span><<\/span>String<\/span>>(<\/span>5<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u5728\u58f0\u660e\u540c\u65f6\u5c06Null\u8d4b\u503c\uff0c\u90a3\u4e48?\u662f\u4e0d\u9700\u8981\u7684\u3002<\/p>\n
\u7ed9\u4e88\u521d\u59cb\u503c<\/p>\n
String<\/span>[]<\/span> a<\/span> =<\/span> {<\/span>\"a\"<\/span>,<\/span>\"b\"<\/span>,<\/span>\"c\"<\/span>};<\/span>\r\n<\/code><\/pre>\n
var<\/span> a<\/span> =<\/span> arrayOf<\/span>(<\/span>\"a\"<\/span>,<\/span>\"b\"<\/span>,<\/span>\"c\"<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u4f7f\u7528\u5de5\u5382\u51fd\u6570\u8fdb\u884c\u521d\u59cb\u5316\u3002<\/p>\n
String<\/span>[]<\/span> a<\/span> =<\/span> {<\/span>\"0\"<\/span>,<\/span>\"2\"<\/span>,<\/span>\"4\"<\/span>,<\/span>\"6\"<\/span>,<\/span>\"8\"<\/span>};<\/span>\r\n<\/code><\/pre>\n
var<\/span> a<\/span> =<\/span> Array<\/span>(<\/span>5<\/span>,{<\/span> i<\/span> -><\/span> (<\/span>i<\/span> *<\/span> 2<\/span>).<\/span>toString<\/span>()<\/span> })<\/span>\r\n<\/code><\/pre>\n
\u5728\u4e2d\u56fd\uff0c\u5c06\u6570\u7ec4(Array())\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u4f5c\u4e3a\u5143\u7d20\u6570\u91cf\uff0c\u7b2c\u4e8c\u4e2a\u53c2\u6570\u4f5c\u4e3a\u7d22\u5f15\u503c\u548c\u8ba1\u7b97\u8868\u8fbe\u5f0f\u3002<\/p>\n
\u64cd\u4f5c\u6570\u7ec4\u5143\u7d20<\/p>\n
\u5c06\u5176\u5e94\u7528<\/p>\n
a<\/span>[<\/span>0<\/span>]=<\/span> \"test\"<\/span>;<\/span>\r\n<\/code><\/pre>\n
a<\/span>[<\/span>0<\/span>]<\/span> =<\/span> \"test\"<\/span>\r\na<\/span>.<\/span>set<\/span>(<\/span>0<\/span>,<\/span> \"test\"<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u83b7\u5f97<\/p>\n
final<\/span> String<\/span> element<\/span> =<\/span> a<\/span>[<\/span>0<\/span>];<\/span>\r\n<\/code><\/pre>\n
val<\/span> element<\/span> =<\/span> a<\/span>[<\/span>0<\/span>]<\/span>\r\nval<\/span> element<\/span> =<\/span> a<\/span>.<\/span>get<\/span>(<\/span>0<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u83b7\u53d6\u8981\u7d20\u6570\u91cf<\/p>\n
final<\/span> int<\/span> size<\/span> =<\/span> a<\/span>.<\/span>length<\/span>;<\/span>\r\n<\/code><\/pre>\n
val<\/span> size<\/span> =<\/span> a<\/span>.<\/span>size<\/span>\r\n<\/code><\/pre>\n
\u83b7\u53d6\u6240\u6709\u8981\u7d20<\/p>\n
\/\/ \u6dfb\u3048\u5b57\u4ed8\u304d\u306e\u30eb\u30fc\u30d7<\/span>\r\nfor<\/span>(<\/span>int<\/span> i<\/span> =<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> c<\/span>.<\/span>length<\/span>;<\/span> i<\/span>++){<\/span>\r\n    final<\/span> String<\/span> element<\/span> =<\/span> c<\/span>[<\/span>i<\/span>];<\/span>\r\n}<\/span>\r\n\/\/ \u8981\u7d20\u3092\u76f4\u63a5\u53d6\u5f97\u3059\u308b\u30eb\u30fc\u30d7<\/span>\r\nfor<\/span>(<\/span>String<\/span> elm<\/span> :<\/span> c<\/span>){<\/span>\r\n    final<\/span> String<\/span> element<\/span> =<\/span> elm<\/span>;<\/span>\r\n}<\/span> \r\n<\/code><\/pre>\n
\/\/ \u6dfb\u3048\u5b57\u4ed8\u304d\u306e\u30eb\u30fc\u30d7<\/span>\r\nfor<\/span> (<\/span>i<\/span> in<\/span> c<\/span>.<\/span>indices<\/span>)<\/span> {<\/span>\r\n    val<\/span> element<\/span> =<\/span> c<\/span>[<\/span>i<\/span>]<\/span>\r\n}<\/span>\r\n\/\/ \u8981\u7d20\u3092\u76f4\u63a5\u53d6\u5f97\u3059\u308b\u30eb\u30fc\u30d7<\/span>\r\nfor<\/span> (<\/span>elm<\/span> in<\/span> c<\/span>)<\/span> {<\/span>\r\n    val<\/span> element<\/span> =<\/span> elm<\/span>\r\n}<\/span>\r\n\/\/ forEach\u3092\u4f7f\u3063\u305f\u8981\u7d20\u3092\u76f4\u63a5\u53d6\u5f97\u3059\u308b\u30eb\u30fc\u30d7<\/span>\r\nc<\/span>.<\/span>forEach<\/span>{<\/span>elm<\/span> -><\/span> val<\/span> element<\/span> =<\/span> elm<\/span>}<\/span>\r\n<\/code><\/pre>\n
Kotlin\u72ec\u6709\u7684\u5faa\u73af\u65b9\u5f0f<\/p>\n
\/\/ \u6dfb\u3048\u5b57\u3068\u8981\u7d20\u306e\u4e2d\u8eab\u3092\u540c\u6642\u306b\u53d6\u308a\u51fa\u3059<\/span>\r\nfor<\/span> ((<\/span>index<\/span>,<\/span> value<\/span>)<\/span> in<\/span> c<\/span>.<\/span>withIndex<\/span>())<\/span> {<\/span>\r\n    println<\/span>(<\/span>\"the element at $index is $value.\"<\/span>)<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u6536\u85cf\u54c1<\/p>\n
\u5728Kotlin\u4e2d\uff0c\u9664\u4e86Java\u7684\u6570\u7ec4\u5bf9\u5e94\u7684Array\u4e4b\u5916\uff0c\u5f53\u7136\u8fd8\u6709\u5176\u4ed6\u4e0e\u96c6\u5408\u76f8\u5bf9\u5e94\u7684\u4e1c\u897f\u3002<\/p>\n
\u5217\u51fa<\/p>\n
\u751f\u6210List<\/p>\n
List<\/span><<\/span>Integer<\/span>><\/span> list<\/span> =<\/span> Arrays<\/span>.<\/span>asList<\/span>(<\/span>0<\/span>,<\/span>1<\/span>,<\/span>2<\/span>);<\/span>\r\n<\/code><\/pre>\n
val<\/span> list<\/span> =<\/span> listOf<\/span>(<\/span>0<\/span>,<\/span>1<\/span>,<\/span>2<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u83b7\u53d6\u8981\u7d20<\/p>\n
final<\/span> int<\/span> elm<\/span> =<\/span> list<\/span>.<\/span>get<\/span>(<\/span>0<\/span>);<\/span>\r\n<\/code><\/pre>\n
val<\/span> elm<\/span> =<\/span> list<\/span>[<\/span>0<\/span>]<\/span>\r\nval<\/span> elm<\/span> =<\/span> list<\/span>.<\/span>get<\/span>(<\/span>0<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u4e0d\u53d8\uff08immutable\uff09\u548c\u53ef\u53d8\uff08mutable\uff09<\/p>\n
\u5982\u4f55\u5728List\u7684\u5143\u7d20\u4e2d\u8fdb\u884c\u8d4b\u503c\u6216\u6dfb\u52a0\u3002
\n\u5305\u62ec\u540e\u9762\u63d0\u5230\u7684Map\u548cSet\u5728\u5185\uff0cKotlin\u7684\u96c6\u5408\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u4e00\u65e6\u751f\u6210\u540e\u5c31\u65e0\u6cd5\u66f4\u6539\u3002
\n\u800cJava\u7684\u96c6\u5408\u662f\u53ef\u53d8\u7684\uff0c\u53ef\u4ee5\u8fdb\u884c\u8d4b\u503c\u548c\u6dfb\u52a0\u64cd\u4f5c\u800c\u65e0\u9700\u7279\u610f\u6ce8\u610f\u3002<\/p>\n
\u5f53\u7136\uff0cKotlin\u4e5f\u63d0\u4f9b\u4e86\u53ef\u53d8\u96c6\u5408\uff0c\u5982\u679c\u60f3\u8981\u8fdb\u884c\u8d4b\u503c\u6216\u6dfb\u52a0\u64cd\u4f5c\uff0c\u53ef\u4ee5\u4f7f\u7528\u8fd9\u4e2a\u3002<\/p>\n
\u589e\u52a0\u8981\u7d20<\/p>\n
List<\/span><<\/span>Integer<\/span>><\/span> list<\/span> =<\/span> new<\/span> ArrayList<\/span><>();<\/span>\r\nlist<\/span>.<\/span>add<\/span>(<\/span>0<\/span>);<\/span>\r\n<\/code><\/pre>\n
val<\/span> list<\/span>:<\/span> MutableList<\/span><<\/span>Int<\/span>><\/span> =<\/span> mutableListOf<\/span>()<\/span>\r\nlist<\/span>.<\/span>add<\/span>(<\/span>0<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u66ff\u6362\u8981\u7d20<\/p>\n
List<\/span><<\/span>String<\/span>><\/span> list<\/span> =<\/span> Arrays<\/span>.<\/span>asList<\/span>(<\/span>\"one\"<\/span>,<\/span>\"two\"<\/span>,<\/span>\"three\"<\/span>);<\/span>\r\nlist<\/span>.<\/span>set<\/span>(<\/span>0<\/span>,<\/span>\"new-one\"<\/span>);<\/span>\r\n<\/code><\/pre>\n
val<\/span> list<\/span> =<\/span> mutableListOf<\/span>(<\/span>\"one\"<\/span>,<\/span>\"two\"<\/span>,<\/span>\"three\"<\/span>)<\/span>\r\nlist<\/span>[<\/span>0<\/span>]<\/span> =<\/span> \"new-one\"<\/span>\r\n<\/code><\/pre>\n
\u5220\u9664\u7684\u8981\u7d20  de<\/p>\n
List<\/span><<\/span>String<\/span>><\/span> list<\/span> =<\/span> Arrays<\/span>.<\/span>asList<\/span>(<\/span>\"one\"<\/span>,<\/span>\"two\"<\/span>,<\/span>\"three\"<\/span>);<\/span>\r\nlist<\/span>.<\/span>remove<\/span>(<\/span>0<\/span>);<\/span>\r\n<\/code><\/pre>\n
val<\/span> list<\/span> =<\/span> mutableListOf<\/span>(<\/span>\"one\"<\/span>,<\/span>\"two\"<\/span>,<\/span>\"three\"<\/span>)<\/span>\r\nlist<\/span>.<\/span>removeAt<\/span>(<\/span>0<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u5730\u56fe<\/p>\n
\u5730\u56fe\u57fa\u672c\u4e0a\u4e0e\u5217\u8868\u76f8\u540c\u3002<\/p>\n
\u521b\u5efa\u5730\u56fe\u3002<\/p>\n
Map<\/span><<\/span>String<\/span>,<\/span> Integer<\/span>><\/span> map<\/span> =<\/span> new<\/span> HashMap<\/span><<\/span>String<\/span>,<\/span> Integer<\/span>>()<\/span> {<\/span>\r\n    {<\/span>\r\n        put<\/span>(<\/span>\"one\"<\/span>,<\/span> 1<\/span>);<\/span>\r\n        put<\/span>(<\/span>\"two\"<\/span>,<\/span> 2<\/span>);<\/span>\r\n        put<\/span>(<\/span>\"three\"<\/span>,<\/span> 3<\/span>);<\/span>\r\n    }<\/span>\r\n};<\/span>\r\n<\/code><\/pre>\n
val<\/span> map<\/span> =<\/span> mapOf<\/span>(<\/span>\"one\"<\/span> to<\/span> 1<\/span>,<\/span> \"two\"<\/span> to<\/span> 2<\/span>,<\/span> \"three\"<\/span> to<\/span> 3<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u83b7\u53d6\u503c<\/p>\n
final<\/span> int<\/span> value<\/span> =<\/span> map<\/span>.<\/span>get<\/span>(<\/span>\"one\"<\/span>);<\/span>\r\n<\/code><\/pre>\n
val<\/span> value<\/span> =<\/span> map<\/span>[<\/span>\"one\"<\/span>]<\/span>\r\nval<\/span> value<\/span> =<\/span> map<\/span>.<\/span>get<\/span>(<\/span>\"one\"<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u6dfb\u52a0\u5143\u7d20 (Tianji yuansu)<\/p>\n
Map<\/span><<\/span>String<\/span>,<\/span> Integer<\/span>><\/span> map<\/span> =<\/span> new<\/span> HashMap<\/span><<\/span>String<\/span>,<\/span> Integer<\/span>>();<\/span>\r\nmap<\/span>.<\/span>put<\/span>(<\/span>\"one\"<\/span>,<\/span> 1<\/span>);<\/span>\r\n<\/code><\/pre>\n
val<\/span> map<\/span>:<\/span> MutableMap<\/span><<\/span>String<\/span>,<\/span> Int<\/span>><\/span> =<\/span> mutableMapOf<\/span>()<\/span>\r\nmap<\/span>.<\/span>put<\/span>(<\/span>\"one\"<\/span>,<\/span> 1<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u5143\u7d20\u7684\u66ff\u4ee3<\/p>\n
Map<\/span><<\/span>String<\/span>,<\/span> Integer<\/span>><\/span> map<\/span> =<\/span> new<\/span> HashMap<\/span><<\/span>String<\/span>,<\/span> Integer<\/span>>()<\/span> {<\/span>\r\n    {<\/span>\r\n        put<\/span>(<\/span>\"one\"<\/span>,<\/span> 1<\/span>);<\/span>\r\n        put<\/span>(<\/span>\"two\"<\/span>,<\/span> 2<\/span>);<\/span>\r\n        put<\/span>(<\/span>\"three\"<\/span>,<\/span> 3<\/span>);<\/span>\r\n    }<\/span>\r\n};<\/span>\r\nmap<\/span>.<\/span>put<\/span>(<\/span>\"one\"<\/span>,<\/span> 100<\/span>);<\/span>\r\n<\/code><\/pre>\n
val<\/span> map<\/span> =<\/span> mutableMapOf<\/span>(<\/span>\"one\"<\/span> to<\/span> 1<\/span>,<\/span> \"two\"<\/span> to<\/span> 2<\/span>,<\/span> \"three\"<\/span> to<\/span> 3<\/span>)<\/span>\r\nmap<\/span>.<\/span>put<\/span>(<\/span>\"one\"<\/span>,<\/span> 100<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u5220\u9664\u8981\u7d20<\/p>\n
Map<\/span><<\/span>String<\/span>,<\/span> Integer<\/span>><\/span> map<\/span> =<\/span> new<\/span> HashMap<\/span><<\/span>String<\/span>,<\/span> Integer<\/span>>()<\/span> {<\/span>\r\n    {<\/span>\r\n        put<\/span>(<\/span>\"one\"<\/span>,<\/span> 1<\/span>);<\/span>\r\n        put<\/span>(<\/span>\"two\"<\/span>,<\/span> 2<\/span>);<\/span>\r\n        put<\/span>(<\/span>\"three\"<\/span>,<\/span> 3<\/span>);<\/span>\r\n    }<\/span>\r\n};<\/span>\r\nmap<\/span>.<\/span>remove<\/span>(<\/span>\"one\"<\/span>);<\/span>\r\n<\/code><\/pre>\n
val<\/span> map<\/span> =<\/span> mutableMapOf<\/span>(<\/span>\"one\"<\/span> to<\/span> 1<\/span>,<\/span> \"two\"<\/span> to<\/span> 2<\/span>,<\/span> \"three\"<\/span> to<\/span> 3<\/span>)<\/span>\r\nmap<\/span>.<\/span>remove<\/span>(<\/span>\"one\"<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u8bbe\u5b9a<\/p>\n
\u7531\u4e8e\u4e0eList\u3001Map\u51e0\u4e4e\u76f8\u540c\uff0c\u6545\u7565\u53bb\u3002<\/p>\n
\u754c\u9762<\/p>\n
\u57fa\u790e\u53e5\u69cb<\/p>\n
public<\/span> interface<\/span> MyInterface<\/span> {<\/span>\r\n    \/\/ \u521d\u671f\u5024\u3042\u308a\u306e\u30d5\u30a3\u30fc\u30eb\u30c9<\/span>\r\n    String<\/span> str<\/span> =<\/span> \"interface\"<\/span>;<\/span>\r\n\r\n    \/\/ \u5b9f\u88c5\u306a\u3057\u306e\u30e1\u30bd\u30c3\u30c9<\/span>\r\n    \/\/ Java8\u524d\u3067\u3082\u5229\u7528\u53ef\u80fd<\/span>\r\n    void<\/span> emptyMethod<\/span>();<\/span>\r\n\r\n    \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u5b9f\u88c5\u3042\u308a\u306e\u30e1\u30bd\u30c3\u30c9<\/span>\r\n    \/\/ Java8\u4ee5\u964d\u306e\u307f\u5229\u7528\u53ef\u80fd<\/span>\r\n    void<\/span> defaultMethod<\/span>(){<\/span>\r\n        \/\/ do something<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
interface<\/span> MyInterface<\/span> {<\/span>\r\n    \/\/ \u5b9f\u88c5\u306a\u3057\u306e\u30e1\u30bd\u30c3\u30c9<\/span>\r\n    fun<\/span> emptyMethod<\/span>()<\/span>\r\n\r\n    \/\/ \u30c7\u30d5\u30a9\u30eb\u30c8\u5b9f\u88c5\u3042\u308a\u306e\u30e1\u30bd\u30c3\u30c9<\/span>\r\n    fun<\/span> defaultMethod<\/span>()<\/span> {<\/span>\r\n        \/\/ do something<\/span>\r\n    }<\/span>\r\n\r\n    companion<\/span> object<\/span> {<\/span>\r\n      val<\/span> str<\/span>=<\/span> \"interface\"<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u62bd\u8c61\u5c5e\u6027\uff08\u5b57\u6bb5\uff09<\/p>\n
\u5728Java\u4e2d\uff0c\u65e0\u6cd5\u5c06\u5b57\u6bb5\u58f0\u660e\u4e3a\u62bd\u8c61\u7684\uff0c\u800c\u5728Kotlin\u4e2d\u53ef\u4ee5\u5b9a\u4e49\u62bd\u8c61\u5c5e\u6027\u3002<\/p>\n
interface<\/span> MyInterface<\/span> {<\/span>\r\n    \/\/ \u6697\u9ed9\u7684\u306babstract\u306b\u306a\u3063\u3066\u308b<\/span>\r\n    val<\/span> abstractStr<\/span>:<\/span> String<\/span>\r\n\r\n    \/\/ getter\/setter\u306f\u5b9a\u7fa9\u3067\u304d\u308b<\/span>\r\n    var<\/span> strHasAccessor<\/span>:<\/span> String<\/span>\r\n    get<\/span>()<\/span> =<\/span> strHasAccessor<\/span>\r\n    set<\/span>(<\/span>value<\/span>)<\/span> {<\/span>\r\n        strHasAccessor<\/span> =<\/span> value<\/span>\r\n    }<\/span>\r\n\r\n    \/\/ \u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5b9f\u88c5\u306f\u4e0d\u53ef\u3002\u521d\u671f\u5024\u3092\u4e0e\u3048\u308b\u3053\u3068\u306f\u3067\u304d\u306a\u3044<\/span>\r\n    val<\/span> str<\/span> =<\/span> \"init\"<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u63a5\u53e3\u4e2d\u7684\u5c5e\u6027\u65e0\u6cd5\u5177\u6709\u521d\u59cb\u503c\u3002<\/p>\n
\u63a5\u53e3\u7684\u5b9e\u73b0<\/p>\n
\u5c1d\u8bd5\u5199\u4e00\u4e0b\u5b9e\u73b0\u4ee5\u4e0b\u63a5\u53e3\u7684\u7c7b\uff0c\u8be5\u63a5\u53e3\u662f\u7528Kotlin\u7f16\u5199\u7684\u3002
\n\u5728Java\u4e2d\uff0c\u901a\u8fc7extends\u6765\u8868\u793a\u7ee7\u627f\uff0c\u901a\u8fc7implements\u6765\u8868\u793a\u5b9e\u73b0\u63a5\u53e3\uff0c\u4f46\u5728Kotlin\u4e2d\uff0c\u5b9e\u73b0\u63a5\u53e3\u7684\u5f62\u5f0f\u4e3a\uff1a
\nclass\u7c7b\u540d :\uff08\u5192\u53f7\uff09\u63a5\u53e3\u540d
\n\u5f53\u7136\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528\u9017\u53f7\u5206\u9694\u6765\u540c\u65f6\u5b9e\u73b0\u591a\u4e2a\u63a5\u53e3\u3002<\/p>\n
interface<\/span> MyInterface<\/span> {<\/span>\r\n    \/\/ abstract\u30d7\u30ed\u30d1\u30c6\u30a3<\/span>\r\n    val<\/span> abstractStr<\/span>:<\/span> String<\/span>\r\n\r\n    \/\/ \u5b9f\u88c5\u306a\u3057\u30e1\u30bd\u30c3\u30c9<\/span>\r\n    fun<\/span> abstractMethod<\/span>()<\/span>\r\n\r\n    \/\/ \u5b9f\u88c5\u3042\u308a\u30e1\u30bd\u30c3\u30c9<\/span>\r\n    fun<\/span> defaultMethod<\/span>(){<\/span>\r\n        \/\/ do something<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
public<\/span> class<\/span> MyClass<\/span> implements<\/span> MyInterface<\/span> {<\/span>\r\n\r\n    @NonNull<\/span>\r\n    @Override<\/span>\r\n    public<\/span> String<\/span> getAbstractStr<\/span>()<\/span> {<\/span>\r\n        \/\/ return\u5024\u306b\u8a2d\u5b9a\u5024\u3092\u5165\u308c\u308b<\/span>\r\n        return<\/span> \"init\"<\/span>;<\/span>\r\n    }<\/span>\r\n\r\n    @Override<\/span>\r\n    public<\/span> void<\/span> abstractMethod<\/span>()<\/span> {<\/span>\r\n\u3000\u3000\u3000\u3000<\/span>\/\/ do something<\/span>\r\n    }<\/span>\r\n\r\n    \/\/ Java8\u4ee5\u524d\u3067\u306f\u30c7\u30d5\u30a9\u30eb\u30c8\u5b9f\u88c5\u3042\u308a\u306e\u30e1\u30bd\u30c3\u30c9\u3082\u5fc5\u305a@Override\u3057\u306a\u304f\u3066\u306f\u3044\u3051\u306a\u3044\u3088\u3046\u3060<\/span>\r\n    @Override<\/span>\r\n    public<\/span> void<\/span> defaultMethod<\/span>()<\/span> {<\/span>\r\n       \/\/ do something<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
class<\/span> MyClass<\/span> :<\/span> MyInterface<\/span>{<\/span>\r\n    override<\/span> val<\/span> abstractStr<\/span>:<\/span> String<\/span> =<\/span> \"init\"<\/span>\r\n\r\n    override<\/span> fun<\/span> abstractMethod<\/span>()<\/span> {<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u6709\u4ee5\u4e0b\u4e24\u4e2a\u65b9\u9762\uff1a
\n1. \u53ef\u4ee5\u5728\u6ca1\u6709\u8bbf\u95ee\u5668\u5b9a\u4e49\u7684\u60c5\u51b5\u4e0b\u76f4\u63a5\u4e3a\u62bd\u8c61\u5c5e\u6027\u8bbe\u7f6e\u521d\u59cb\u503c\u3002
\n2. \u9ed8\u8ba4\u5b9e\u73b0\u7684defaultMethod()\u53ef\u4ee5\u7531\u7528\u6237\u51b3\u5b9a\u662f\u5426\u91cd\u5199\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4ec0\u4e48\u6837\u7684\u6587\u7ae0\uff1f \u5982\u679c\u7528Java\u6765\u7f16\u5199\u7684\u8bdd\uff0c\u90a3\u4e48\u7528Kotlin\u8be5\u600e\u4e48\u5199\u5462\uff1f\u4e00\u4e2a\u5173\u4e8e\u4ee3\u7801\u6bd4\u8f83\u7684\u5907\u5fd8\u5f55\u3002 \u611f\u8c22\u60a8\u63d0\u4f9b […]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-31033","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"\n\u3010Kotlin\u3011\u3010Java\u3011\u5173\u4e8eKotlin\u548cJava\u7684\u6bd4\u8f83\u5907\u5fd8\u5f55 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u3010Kotlin\u3011\u3010Java\u3011\u5173\u4e8eKotlin\u548cJava\u7684\u6bd4\u8f83\u5907\u5fd8\u5f55\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010kotlin\u3011\u3010java\u3011\u5173\u4e8ekotlin\u548cjava\u7684\u6bd4\u8f83\u5907\u5fd8\u5f55\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010Kotlin\u3011\u3010Java\u3011\u5173\u4e8eKotlin\u548cJava\u7684\u6bd4\u8f83\u5907\u5fd8\u5f55\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8e\u3010Kotlin\u3011\u3010Java\u3011\u5173\u4e8eKotlin\u548cJava\u7684\u6bd4\u8f83\u5907\u5fd8\u5f55\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u3010kotlin\u3011\u3010java\u3011\u5173\u4e8ekotlin\u548cjava\u7684\u6bd4\u8f83\u5907\u5fd8\u5f55\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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