{"id":31245,"date":"2023-08-24T00:58:38","date_gmt":"2023-03-17T08:26:07","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%b8%80%e4%bd%8djava%e5%b7%a5%e7%a8%8b%e5%b8%88%e5%af%b9swift%e3%80%81kotlin%e5%92%8cjava%e8%bf%9b%e8%a1%8c%e4%ba%86%e6%af%94%e8%be%83%e3%80%82\/"},"modified":"2025-08-12T23:02:32","modified_gmt":"2025-08-12T15:02:32","slug":"%e4%b8%80%e4%bd%8djava%e5%b7%a5%e7%a8%8b%e5%b8%88%e5%af%b9swift%e3%80%81kotlin%e5%92%8cjava%e8%bf%9b%e8%a1%8c%e4%ba%86%e6%af%94%e8%be%83%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%b8%80%e4%bd%8djava%e5%b7%a5%e7%a8%8b%e5%b8%88%e5%af%b9swift%e3%80%81kotlin%e5%92%8cjava%e8%bf%9b%e8%a1%8c%e4%ba%86%e6%af%94%e8%be%83%e3%80%82\/","title":{"rendered":"\u4e00\u4f4dJava\u5de5\u7a0b\u5e08\u5bf9Swift\u3001Kotlin\u548cJava\u8fdb\u884c\u4e86\u6bd4\u8f83"},"content":{"rendered":"

\u6211\u4eec\u5728\u516c\u53f8\u5185\u4e3e\u529e\u4e86Kotlin\u5b66\u4e60\u4f1a\uff0c\u7ecf\u5e38\u4f1a\u6709\u4eba\u63d0\u51fa\u7591\u95ee\uff0c\u5982\u679c\u7528Swift\u6216Java\u7684\u8bed\u6cd5\u6765\u5199Kotlin\u4ee3\u7801\u4f1a\u600e\u6837\u5462\uff1f\u56e0\u6b64\uff0c\u6211\u6253\u7b97\u8fdb\u884c\u8c03\u67e5\u5e76\u5b9e\u9645\u5b9e\u73b0\u6765\u89e3\u7b54\u8fd9\u4e2a\u95ee\u9898\u3002
\n\u7531\u4e8e\u8fd9\u4e9b\u8bed\u8a00\u5728\u8bed\u6cd5\u4e0a\u6709\u6240\u4e0d\u540c\uff0c\u6240\u4ee5\u53ef\u80fd\u4e0d\u4f1a\u5b8c\u5168\u4e00\u81f4\uff0c\u8bf7\u5927\u5bb6\u8c05\u89e3\u3002
\n\u203b\u6211\u4f1a\u5b9a\u671f\u66f4\u65b0\u3002<\/p>\n

\u9a8c\u8bc1\u53c2\u8003\u8f6c\u4ea4<\/p>\n

Kotlin\uff1a\u53ea\u9700\u8981\u4e00\u4e2a\u9009\u9879\uff0c\u7528\u4e2d\u6587\u8fdb\u884c\u91ca\u4e49\u7531\u4e8e\u5728\u516c\u53f8\u7684\u5b66\u4e60\u4f1a\u4e0a\u8c08\u5230\u4e86\u5728Kotlin\u4e2d\u5982\u4f55\u5b9e\u73b0\u4f20\u9012\u5f15\u7528\uff0c\u6211\u8fdb\u884c\u4e86\u4e00\u4e9b\u7b80\u5355\u7684\u9a8c\u8bc1\u3002<\/p>\n

\u5728Kotlin\u4e2d\uff0c\u5982\u679c\u4e0d\u660e\u786e\u58f0\u660e\u4e3a\u53ef\u53d8\uff08mutable\uff09\uff0c\u5c31\u65e0\u6cd5\u4ee5\u5f15\u7528\u65b9\u5f0f\u4f7f\u7528\u3002\u800c\u4e14\uff0c\u5982\u679c\u5c1d\u8bd5\u5bf9\u53c2\u6570\u8fdb\u884c\u8d4b\u503c\uff0c\u5c06\u4f1a\u5bfc\u81f4\u7f16\u8bd1\u9519\u8bef\u3002<\/p>\n

fun<\/span> addArray<\/span>(<\/span>array<\/span>:<\/span> MutableList<\/span><<\/span>Int<\/span>>)<\/span> {<\/span>\r\n    array<\/span>.<\/span>add<\/span>(<\/span>9<\/span>)<\/span>\r\n    println<\/span>(<\/span>array<\/span>)<\/span> \/\/ [1, 2, 3, 9]<\/span>\r\n}<\/span>\r\n\r\nfun<\/span> changeArray<\/span>(<\/span>array<\/span>:<\/span> MutableList<\/span><<\/span>Int<\/span>>)<\/span> {<\/span>\r\n    array<\/span> =<\/span> mutableListOf<\/span>(<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>)<\/span> \/\/ \u5f15\u6570\u306b\u4ee3\u5165\u306f\u3067\u304d\u306a\u3044\u3002\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc\u306b\u306a\u308b\u3002<\/span>\r\n    println<\/span>(<\/span>array<\/span>)<\/span>\r\n}<\/span>\r\n\r\nfun<\/span> main<\/span>(<\/span>args<\/span>:<\/span> Array<\/span><<\/span>String<\/span>>)<\/span> {<\/span>\r\n    val<\/span> array<\/span> =<\/span> mutableListOf<\/span>(<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>)<\/span>\r\n    println<\/span>(<\/span>array<\/span>)<\/span> \/\/ [1, 2, 3]<\/span>\r\n    addArray<\/span>(<\/span>array<\/span>)<\/span>\r\n    println<\/span>(<\/span>array<\/span>)<\/span> \/\/ [1, 2, 3, 9]<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8fc5\u901f
\n\u5982\u679c\u5728Swift\u4e2d\u4f7f\u7528inout\u58f0\u660e\u4e3a\u5f15\u7528\u4f20\u9012\uff0c\u4f3c\u4e4e\u5c31\u53ef\u4ee5\u5b9e\u73b0\u3002\u7531\u4e8e\u662f\u5f15\u7528\u4f20\u9012\uff0c\u6240\u4ee5\u53ef\u4ee5\u5728\u51fd\u6570\u5185\u5bf9\u6570\u7ec4\u53d8\u91cf\u8fdb\u884c\u4fee\u6539\u3002<\/p>\n
func<\/span> addArray<\/span>(<\/span>array<\/span> :<\/span> inout<\/span> [<\/span>Int<\/span>])<\/span>  {<\/span>\r\n    array<\/span>.<\/span>append<\/span>(<\/span>9<\/span>)<\/span>\r\n    print<\/span>(<\/span>array<\/span>)<\/span>  \/\/ [1, 2, 3, 9]<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> substituteArray<\/span>(<\/span>array<\/span> :<\/span> inout<\/span> [<\/span>Int<\/span>])<\/span>  {<\/span>\r\n    array<\/span> =<\/span> [<\/span>100<\/span>,<\/span> 200<\/span>,<\/span> 300<\/span>]<\/span>\r\n    print<\/span>(<\/span>array<\/span>)<\/span>  \/\/  [100, 200, 300]<\/span>\r\n}<\/span>\r\n\r\nvar<\/span> array<\/span> =<\/span> [<\/span>1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>]<\/span>\r\nprint<\/span>(<\/span>array<\/span>)<\/span>    \/\/ [1, 2, 3]<\/span>\r\naddArray<\/span>(<\/span>array<\/span>:<\/span> &<\/span>array<\/span>)<\/span>\r\nprint<\/span>(<\/span>array<\/span>)<\/span>    \/\/ [1, 2, 3, 9]<\/span>\r\nsubstituteArray<\/span>(<\/span>array<\/span>:<\/span> &<\/span>array<\/span>)<\/span>\r\nprint<\/span>(<\/span>array<\/span>)<\/span>    \/\/ [100, 200, 300]<\/span>\r\n<\/code><\/pre>\n
Java – \u7a0b\u5e8f\u8bbe\u8ba1\u8bed\u8a00
\n\u6211\u5728Java\u4e2d\u5c1d\u8bd5\u4e86\u76f8\u540c\u7684\u7ec4\u5408\uff0c\u867d\u7136\u53ef\u4ee5\u4f7f\u7528\u6570\u7ec4\u7684\u65b9\u6cd5\u6765\u8fdb\u884c\u66f4\u6539\uff0c\u4f46\u662f\u5373\u4f7f\u5728\u53c2\u8003\u65b9\u6cd5\u5185\u65b0\u5b9e\u4f8b\u5316\u5e76\u8d4b\u503c\uff0c\u539f\u59cb\u53d8\u91cf\u6307\u5411\u7684\u6570\u7ec4\u4ecd\u7136\u6ca1\u6709\u6539\u53d8\u3002<\/p>\n
import<\/span> java.util.ArrayList<\/span>;<\/span>\r\n\r\nclass<\/span> ArrayTest<\/span> {<\/span>\r\n    private<\/span> static<\/span> void<\/span> addArray<\/span>(<\/span>ArrayList<\/span><<\/span>Integer<\/span>><\/span> array<\/span>)<\/span> {<\/span>\r\n        array<\/span>.<\/span>add<\/span>(<\/span>9<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>array<\/span>);<\/span> \/\/ [1, 2, 3, 9]<\/span>\r\n    }<\/span>\r\n\r\n    private<\/span> static<\/span> void<\/span> substituteArray<\/span>(<\/span>ArrayList<\/span><<\/span>Integer<\/span>><\/span> array<\/span>)<\/span> {<\/span>\r\n        array<\/span> =<\/span> new<\/span> ArrayList<\/span><<\/span>Integer<\/span>>();<\/span>\u3000<\/span>\/\/ \u3053\u3053\u3067\u65b0\u3057\u3044ArrayList\u3092\u4ee3\u5165\u3057\u3066\u3082\u5143\u306e\u30b9\u30b3\u30fc\u30d7\u306b\u5909\u66f4\u306f\u306a\u3044\u3002<\/span>\r\n        array<\/span>.<\/span>add<\/span>(<\/span>100<\/span>);<\/span>\r\n        array<\/span>.<\/span>add<\/span>(<\/span>200<\/span>);<\/span>\r\n        array<\/span>.<\/span>add<\/span>(<\/span>300<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>array<\/span>);<\/span> \/\/ [100, 200, 300]<\/span>\r\n    }<\/span>\r\n\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> args<\/span>[])<\/span> {<\/span>\r\n        ArrayList<\/span><<\/span>Integer<\/span>><\/span> array<\/span> =<\/span> new<\/span> ArrayList<\/span><<\/span>Integer<\/span>>();<\/span>\r\n        array<\/span>.<\/span>add<\/span>(<\/span>1<\/span>);<\/span>\r\n        array<\/span>.<\/span>add<\/span>(<\/span>2<\/span>);<\/span>\r\n        array<\/span>.<\/span>add<\/span>(<\/span>3<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>array<\/span>);<\/span> \/\/ [1, 2, 3]<\/span>\r\n        addArray<\/span>(<\/span>array<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>array<\/span>);<\/span> \/\/ [1, 2, 3, 9]<\/span>\r\n        substituteArray<\/span>(<\/span>array<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>array<\/span>);<\/span> \/\/ [1, 2, 3, 9]\uff08[100, 200, 300]\u306b\u306f\u306a\u3089\u306a\u3044\uff09<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u754c\u9762<\/p>\n
Kotlin \u53ef\u4ee5\u3002
\n\u6211\u672c\u4ee5\u4e3aKotlin\u63a5\u53e3\u7684\u4f7f\u7528\u65b9\u6cd5\u4e0eJava\u6ca1\u6709\u592a\u5927\u5dee\u5f02\uff0c\u4f46\u6211\u8ba4\u4e3a\u4e0eJava\u4e0d\u540c\u7684\u5730\u65b9\u662f\u53ef\u4ee5\u5bf9\u5b57\u6bb5\u53d8\u91cf\u8fdb\u884c\u9650\u5236\u3002<\/p>\n
\r\ninterface<\/span> Lang<\/span> {<\/span>\r\n    val<\/span> name<\/span>:<\/span> String<\/span>\r\n    fun<\/span> getHelloWorld<\/span>(<\/span>target<\/span>:<\/span> String<\/span>)<\/span> :<\/span> String<\/span>\r\n}<\/span>\r\n\r\nclass<\/span> English<\/span> :<\/span> Lang<\/span> {<\/span>\r\n    override<\/span> val<\/span> name<\/span> =<\/span> \"English\"<\/span> \/\/ \u5ba3\u8a00\u3057\u306a\u3044\u3068\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc<\/span>\r\n    override<\/span> fun<\/span> getHelloWorld<\/span>(<\/span>target<\/span>:<\/span> String<\/span>)<\/span> :<\/span> String<\/span> {<\/span>\r\n        return<\/span> \"Hello, $target!\"<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nclass<\/span> Japanese<\/span> :<\/span> Lang<\/span> {<\/span>\r\n    override<\/span> val<\/span> name<\/span> =<\/span> \"\u65e5\u672c\u8a9e\"<\/span>\r\n    override<\/span> fun<\/span> getHelloWorld<\/span>(<\/span>target<\/span>:<\/span> String<\/span>)<\/span> :<\/span> String<\/span> {<\/span>\r\n        return<\/span> \"\u3053\u3093\u306b\u3061\u306f\u3001 $target!\"<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nfun<\/span> main<\/span>(<\/span>args<\/span>:<\/span> Array<\/span><<\/span>String<\/span>>)<\/span> {<\/span>\r\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000\u3000<\/span>val<\/span> Elang<\/span> =<\/span> English<\/span>()<\/span>\r\n    println<\/span>(<\/span>Elang<\/span>.<\/span>getHelloWorld<\/span>(<\/span>\"world\"<\/span>))<\/span> \/\/ Hello, world!<\/span>\r\n    val<\/span> Jlang<\/span> =<\/span> Japanese<\/span>()<\/span>\r\n    println<\/span>(<\/span>Jlang<\/span>.<\/span>getHelloWorld<\/span>(<\/span>\"world\"<\/span>))<\/span> \/\/ \u3053\u3093\u306b\u3061\u306f\u3001 world!<\/span>\r\n\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u8fc5\u901f
\n\u5728Swift\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u534f\u8bae\u5b9e\u73b0\u7c7b\u4f3c\u4e8eKotlin\u63a5\u53e3\u7684\u529f\u80fd\u3002<\/p>\n
protocol<\/span> Lang<\/span> {<\/span>\r\n    var<\/span> name<\/span> :<\/span> String<\/span> {<\/span>get<\/span>}<\/span>\r\n    func<\/span> getHelloWorld<\/span>(<\/span>target<\/span> :<\/span>String<\/span>)<\/span> -><\/span> String<\/span>\r\n}<\/span>\r\n\r\nclass<\/span> English<\/span>:<\/span> Lang<\/span> {<\/span>\r\n\r\n    let<\/span> name<\/span> =<\/span> \"English\"<\/span>\r\n    func<\/span> getHelloWorld<\/span>(<\/span>target<\/span> :<\/span> String<\/span>)<\/span>  -><\/span> String<\/span> {<\/span>\r\n        return<\/span> \"Hello, <\/span>\\(<\/span>target<\/span>)<\/span>\"<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nclass<\/span> Japanese<\/span>:<\/span> Lang<\/span> {<\/span>\r\n\r\n    let<\/span> name<\/span> =<\/span> \"Japanese\"<\/span>\r\n    func<\/span> getHelloWorld<\/span>(<\/span>target<\/span> :<\/span> String<\/span>)<\/span>  -><\/span> String<\/span> {<\/span>\r\n        return<\/span> \"\u3053\u3093\u306b\u3061\u306f, <\/span>\\(<\/span>target<\/span>)<\/span>\"<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nlet<\/span> Elang<\/span> =<\/span> English<\/span>()<\/span>\r\nprint<\/span>(<\/span>Elang<\/span>.<\/span>getHelloWorld<\/span>(<\/span>target<\/span>:<\/span> \"world\"<\/span>))<\/span> \/\/ Hello, world!<\/span>\r\nlet<\/span> Jlang<\/span> =<\/span> Japanese<\/span>()<\/span>\r\nprint<\/span>(<\/span>Jlang<\/span>.<\/span>getHelloWorld<\/span>(<\/span>target<\/span>:<\/span> \"world\"<\/span>))<\/span> \/\/ \u3053\u3093\u306b\u3061\u306f, world<\/span>\r\n<\/code><\/pre>\n
Java – Java
\n\u56e0\u4e3a\u6211\u4ece\u6765\u6ca1\u6709\u8003\u8651\u8fc7\u8fd9\u79cd\u7528\u6cd5\uff0c\u6240\u4ee5\u6ca1\u6709\u6ce8\u610f\u5230\uff0c\u4f46\u662fJava\u5728\u63a5\u53e3\u4e2d\u5b9a\u4e49\u5b57\u6bb5\u540e\uff0c\u4e0d\u80fd\u5f3a\u5236\u5b9e\u73b0\u7c7b\u4e5f\u62e5\u6709\u76f8\u540c\u7684\u5b57\u6bb5\u3002
\n\uff08\u5b9e\u9645\u4e0a\uff0c\u8fd9\u4e9b\u5b57\u6bb5\u4f1a\u88ab\u5f3a\u5236\u53d8\u4e3apublic static final\uff0c\u53ea\u80fd\u5f53\u4f5c\u5e38\u91cf\u5904\u7406\u3002\uff09<\/p>\n
interface<\/span> Lang<\/span> {<\/span>\r\n    public<\/span> static<\/span> final<\/span> String<\/span> name<\/span> =<\/span> \"\"<\/span>;<\/span> \/\/ \u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u306b\u5b9a\u7fa9\u3057\u305f\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u5f37\u5236\u7684\u306b public staic final \u306b\u306a\u308b\u3002<\/span>\r\n    public<\/span> String<\/span> getHelloWorld<\/span>(<\/span>String<\/span> target<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
class<\/span> English<\/span> implements<\/span> Lang<\/span> {<\/span>\r\n    \/\/ public String name; \/\/ \u5ba3\u8a00\u3057\u306a\u304f\u3066\u3082OK<\/span>\r\n\r\n    @Override<\/span>\r\n    public<\/span> String<\/span> getHelloWorld<\/span>(<\/span>String<\/span> target<\/span>)<\/span> {<\/span>\r\n        return<\/span> \"Hello, %TARGET%!\"<\/span>.<\/span>replace<\/span>(<\/span>\"%TARGET%\"<\/span>,<\/span> target<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
class<\/span> Japanese<\/span> implements<\/span> Lang<\/span> {<\/span>\r\n\r\n    @Override<\/span>\r\n    public<\/span> String<\/span> getHelloWorld<\/span>(<\/span>String<\/span> target<\/span>)<\/span> {<\/span>\r\n        return<\/span> \"\u3053\u3093\u306b\u3061\u308f, %TARGET%!\"<\/span>.<\/span>replace<\/span>(<\/span>\"%TARGET%\"<\/span>,<\/span> target<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
class<\/span> InterfaceTest<\/span> {<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> args<\/span>[])<\/span> {<\/span>\r\n        English<\/span> Elang<\/span> =<\/span> new<\/span> English<\/span>();<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>Elang<\/span>.<\/span>getHelloWorld<\/span>(<\/span>\"world\"<\/span>));<\/span> \/\/ Hello, world!<\/span>\r\n        Japanese<\/span> Jlang<\/span> =<\/span> new<\/span> Japanese<\/span>();<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>Jlang<\/span>.<\/span>getHelloWorld<\/span>(<\/span>\"world\"<\/span>));<\/span> \/\/ \u3053\u3093\u306b\u3061\u306f, world<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4f34\u4fa3\u5bf9\u8c61 l\u01da<\/p>\n
Kotlin
\nKotlin is a programming language.
\n\u5728Java\u548c\u5176\u4ed6\u8bed\u8a00\u4e2d\uff0c\u79f0\u4e3a\u9759\u6001\u8bbf\u95ee\uff08Static\uff09\u7684\u6982\u5ff5\uff0c\u5728Kotlin\u4e2d\u53ef\u4ee5\u901a\u8fc7Companion Object\u5b9e\u73b0\u3002<\/p>\n
interface<\/span> Lang<\/span> {<\/span>\r\n    val<\/span> name<\/span>:<\/span> String<\/span>\r\n    fun<\/span> getHelloWorld<\/span>(<\/span>target<\/span>:<\/span> String<\/span>)<\/span> :<\/span> String<\/span>\r\n}<\/span>\r\n\r\nclass<\/span> English<\/span> :<\/span> Lang<\/span> {<\/span>\r\n    override<\/span> val<\/span> name<\/span> =<\/span> \"English\"<\/span>\r\n    override<\/span> fun<\/span> getHelloWorld<\/span>(<\/span>target<\/span>:<\/span> String<\/span>)<\/span> :<\/span> String<\/span> {<\/span>\r\n        return<\/span> \"Hello, $target!\"<\/span>\r\n    }<\/span>\r\n    companion<\/span> object<\/span>\u3000<\/span>Factory<\/span> {<\/span> \/\/ Companion object<\/span>\r\n        fun<\/span> create<\/span>():<\/span> English<\/span> =<\/span> English<\/span>()<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nfun<\/span> main<\/span>(<\/span>args<\/span>:<\/span> Array<\/span><<\/span>String<\/span>>)<\/span> {<\/span>\r\n    val<\/span> Egreeter<\/span> =<\/span> English<\/span>.<\/span>create<\/span>()<\/span> \/\/ Create\u30e1\u30bd\u30c3\u30c9\u3067English\u306e\u5b9f\u4f53\u3092\u751f\u6210<\/span>\r\n    println<\/span>(<\/span>Egreeter<\/span>.<\/span>getHelloWorld<\/span>(<\/span>\"world\"<\/span>))<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u6211\u5c1d\u8bd5\u4e86\u5f88\u591a\u65b9\u6cd5\uff0c\u4f46\u662fCompanionObject\u7684\u64cd\u4f5c\u5982\u4e0b\u6240\u793a\u3002<\/p>\n
    \n
  • \n
      \uff11\u30af\u30e9\u30b9\u5185\u306b\u5b9a\u7fa9\u3067\u304d\u308bCompanionObject\u306f\u4e00\u3064<\/ul>\n<\/li>\n<\/ul>\n
       <\/p>\n
        \n
      • \n
          \u9759\u7684\u30a2\u30af\u30bb\u30b9\u306a\u306e\u3067\u3001CompanionObject\u5185\u304b\u3089\u6240\u5c5e\u30af\u30e9\u30b9\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3001\u30e1\u30bd\u30c3\u30c9\u306b\u306f\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u3044\u3002<\/ul>\n<\/li>\n<\/ul>\n
           <\/p>\n
            const \u3092\u4ed8\u3051\u3066\u5b9a\u6570\u3092\u5b9a\u7fa9\u3067\u304d\u308b\u3057\u3001companion object\u5185\u306b\u5909\u6570\u3092\u5ba3\u8a00\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u308b\u3002<\/ul>\n
            \r\nclass<\/span> English<\/span> :<\/span> Lang<\/span> {<\/span>\r\n    override<\/span> val<\/span> name<\/span> =<\/span> \"English\"<\/span>\r\n    override<\/span> fun<\/span> getHelloWorld<\/span>(<\/span>target<\/span>:<\/span> String<\/span>)<\/span> :<\/span> String<\/span> {<\/span>\r\n        return<\/span> \"Hello, $target!\"<\/span>\r\n    }<\/span>\r\n    companion<\/span> object<\/span>\u3000<\/span>Factory<\/span> {<\/span> \/\/ Factory\u306f\u3042\u3063\u3066\u3082\u306a\u304f\u3066\u3082\u3044\u3044\u3051\u3069\u3001java\u304b\u3089companion object\u5185\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u306e\u306b\u5fc5\u8981\u3002<\/span>\r\n        const<\/span> val<\/span> COMPANION_NAME<\/span> =<\/span> \"Companion\"<\/span> \/\/ \u5b9a\u6570\u306e\u5b9a\u7fa9\u304c\u3067\u304d\u308b\u3002<\/span>\r\n        val<\/span> companionName<\/span> =<\/span> \"test\"<\/span> \/\/ const\u3092\u4ed8\u3051\u306a\u304f\u3066\u3082\u9759\u7684\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u30d5\u30a3\u30fc\u30eb\u30c9\u5909\u6570\u3092\u5ba3\u8a00\u3067\u304d\u308b\u3002<\/span>\r\n        fun<\/span> create<\/span>():<\/span> English<\/span> =<\/span> English<\/span>()<\/span>\r\n        fun<\/span> getNameCom<\/span>():<\/span> String<\/span> {<\/span>\r\n            \/\/ return name \/\/ Companion Object\u3000\u5185\u304b\u3089\u3000English\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u306f\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u3044\u3002<\/span>\r\n            return<\/span> companionName<\/span>\u3000<\/span> \/\/ Companion Object\u5185\u306e\u5909\u6570\u306a\u3089\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
            \u4ece\u8868\u9762\u4e0a\u770b\uff0c\u5b83\u4f3c\u4e4e\u5efa\u8bae\u5728\u57fa\u672c\u4e0a\u662f\u5e38\u91cf\u503c\uff0c\u6216\u8005\u5728\u5b9e\u73b0\u7c7b\u4f3c\u4e8ecreate\u65b9\u6cd5\u7684\u5de5\u5382\u6a21\u5f0f\u65f6\u4f7f\u7528\u3002<\/p>\n
            \u8fc5\u901f
            \n\u5728Swift\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u9759\u6001\u58f0\u660e\u6765\u5b9e\u73b0\u7c7b\u4f3c\u7684\u529f\u80fd\u3002
            \n\u76f8\u6bd4\u4e8e\u8bb0\u4f5cCompanion Object\uff0c\u66f4\u5bb9\u6613\u7406\u89e3\u3002<\/p>\n
            protocol<\/span> Lang<\/span> {<\/span>\r\n    var<\/span> name<\/span> :<\/span> String<\/span> {<\/span>get<\/span>}<\/span>\r\n    func<\/span> getHelloWorld<\/span>(<\/span>target<\/span> :<\/span>String<\/span>)<\/span> -><\/span> String<\/span>\r\n}<\/span>\r\n\r\nclass<\/span> English<\/span>:<\/span> Lang<\/span> {<\/span>\r\n\r\n    let<\/span> name<\/span> =<\/span> \"English\"<\/span>\r\n    func<\/span> getHelloWorld<\/span>(<\/span>target<\/span> :<\/span> String<\/span>)<\/span>  -><\/span> String<\/span> {<\/span>\r\n        return<\/span> \"Hello, <\/span>\\(<\/span>target<\/span>)<\/span>\"<\/span>\r\n    }<\/span>\r\n    static<\/span> var<\/span> COMPANION_NAME<\/span> =<\/span> \"Companion\"<\/span>\r\n    static<\/span> func<\/span> create<\/span>()<\/span> -><\/span> English<\/span> {<\/span>\r\n        return<\/span> English<\/span>()<\/span>\r\n    }<\/span>\r\n    static<\/span> func<\/span> getName<\/span>()<\/span> -><\/span> String<\/span> {<\/span>\r\n        return<\/span> name<\/span>\u3000\u3000\u3000<\/span>\/\/ Static\u306a\u95a2\u6570\u304b\u3089\u306f\u30e1\u30f3\u30d0\u5909\u6570\u306b\u306f\u30a2\u30af\u30bb\u30b9\u3067\u304d\u306a\u3044\u3002<\/span>\r\n    }<\/span>\r\n\r\n}<\/span>\r\n\r\nlet<\/span> Egreeter<\/span> =<\/span> English<\/span>.<\/span>create<\/span>()<\/span>\r\nprint<\/span>(<\/span>Egreeter<\/span>.<\/span>getHelloWorld<\/span>(<\/span>target<\/span>:<\/span> \"world\"<\/span>))<\/span>\r\nprint<\/span>(<\/span>English<\/span>.<\/span>COMPANION_NAME<\/span>)<\/span> \/\/ \u5b9a\u6570\u306a\u306e\u3067\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b<\/span>\r\n\r\n<\/code><\/pre>\n
            Java:
            \nJAVA<\/p>\n
            Java\u53ef\u4ee5\u50cfSwift\u4e00\u6837\u8fdb\u884c\u7f16\u7a0b\u3002<\/p>\n
            interface<\/span> Lang<\/span> {<\/span>\r\n    public<\/span> String<\/span> getHelloWorld<\/span>(<\/span>String<\/span> target<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
            class<\/span> English<\/span> implements<\/span> Lang<\/span> {<\/span>\r\n    public<\/span> String<\/span> name<\/span> =<\/span> \"English\"<\/span>;<\/span>\r\n\r\n    @Override<\/span>\r\n    public<\/span> String<\/span> getHelloWorld<\/span>(<\/span>String<\/span> target<\/span>)<\/span> {<\/span>\r\n        return<\/span> \"Hello, %TARGET%!\"<\/span>.<\/span>replace<\/span>(<\/span>\"%TARGET%\"<\/span>,<\/span> target<\/span>);<\/span>\r\n    }<\/span>\r\n\r\n    public<\/span> static<\/span> final<\/span> String<\/span> COMPANION_NAME<\/span> =<\/span> \"Companion\"<\/span>;<\/span>\r\n\r\n    public<\/span> static<\/span> English<\/span> create<\/span>(){<\/span>\r\n        return<\/span> new<\/span> English<\/span>();<\/span>\r\n    }<\/span>\r\n    public<\/span> static<\/span> String<\/span> getName<\/span>()<\/span> {<\/span>\r\n        return<\/span> name<\/span>;<\/span> \/\/ static\u3067\u306a\u3044\u5909\u6570 name\u3092static\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u304b\u3089\u53c2\u7167\u3059\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093 \u30a8\u30e9\u30fc\u304c\u51fa\u308b\u3002<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
            class<\/span> StaticTest<\/span> {<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> args<\/span>[])<\/span> {<\/span>\r\n        English<\/span> Elang<\/span> =<\/span> English<\/span>.<\/span>create<\/span>();<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>Elang<\/span>.<\/span>getHelloWorld<\/span>(<\/span>\"world\"<\/span>));<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>English<\/span>.<\/span>COMPANION_NAME<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
            \u7c7b\u7ee7\u627f\u548c\u6784\u9020\u51fd\u6570\u3002<\/p>\n
            Kotlin\u53ea\u9700\u8981\u4e00\u79cd\u9009\u9879\u3002
            \n\u4e3a\u4e86\u8c03\u67e5\u7c7b\u7684\u7ee7\u627f\u548c\u6784\u9020\u65b9\u6cd5\uff0c\u6211\u521b\u5efa\u4e86\u4e00\u4e2a\u540d\u4e3aEngland\u7684\u7c7b\u548c\u5b83\u7684\u62bd\u8c61\u7c7bCountry\u3002\u5b83\u4eec\u5177\u6709\u5c5e\u6027\uff1a\u56fd\u5bb6\u540d\u79f0\u3001\u8bed\u8a00\u548c\u4eba\u53e3\u3002
            \n\u6b64\u5916\uff0c\u56fd\u5bb6\u53ef\u4ee5\u83b7\u53d6\u95ee\u5019\u8bed\u548c\u4eba\u53e3\u6570\u91cf\uff0c\u5b9e\u9645\u5904\u7406\u662f\u59d4\u6258\u7ed9Lang\u63a5\u53e3\u7684\u5b9e\u73b0\u7c7b\u3002
            \n\uff08\u8bf4\u5b9e\u8bdd\uff0c\u6211\u89c9\u5f97\u7c7b\u7684\u8bbe\u8ba1\u4e0d\u662f\u5f88\u597d\u3002\uff09<\/p>\n
            interface<\/span> Lang<\/span> {<\/span>\r\n    val<\/span> name<\/span>:<\/span> String<\/span>\r\n    fun<\/span> getHelloWorld<\/span>(<\/span>target<\/span>:<\/span> String<\/span>)<\/span> :<\/span> String<\/span>\r\n    fun<\/span> getPopulation<\/span>(<\/span>countryName<\/span>:<\/span> String<\/span>,<\/span> population<\/span> :<\/span> Int<\/span>)<\/span> :<\/span> String<\/span>\r\n}<\/span>\r\n\r\nclass<\/span> English<\/span> :<\/span> Lang<\/span> {<\/span>\r\n    override<\/span> val<\/span> name<\/span> =<\/span> \"English\"<\/span>\r\n    override<\/span> fun<\/span> getHelloWorld<\/span>(<\/span>target<\/span>:<\/span> String<\/span>)<\/span> :<\/span> String<\/span> {<\/span>\r\n        return<\/span> \"Hello, $target!\"<\/span>\r\n    }<\/span>\r\n    override<\/span> fun<\/span> getPopulation<\/span>(<\/span>countryName<\/span>:<\/span> String<\/span>,<\/span> population<\/span> :<\/span> Int<\/span>)<\/span> :<\/span> String<\/span> {<\/span>\r\n        return<\/span> \"$countryName has a population of $population people.\"<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\n\/\/ \u57fa\u5e95\u30af\u30e9\u30b9\u306b\u56fd\u540d\u3001\u8a00\u8a9e\u3001\u4eba\u53e3\u306e\u5c5e\u6027\u3092\u6301\u305f\u305b\u3066\u3001\u5fc5\u9808\u306b\u306a\u308b\u3088\u3046\u306b\u3059\u308b<\/span>\r\nabstract<\/span> class<\/span> Country<\/span> (<\/span>_name<\/span> :<\/span> String<\/span>,<\/span> _lang<\/span>:<\/span> Lang<\/span>,<\/span> _population<\/span>:<\/span> Int<\/span>)<\/span> {<\/span>\r\n    val<\/span> name<\/span> :<\/span> String<\/span> =<\/span> _name<\/span>\r\n    val<\/span> lang<\/span> :<\/span> Lang<\/span> =<\/span> _lang<\/span>\r\n    val<\/span> population<\/span> =<\/span> _population<\/span>\r\n    fun<\/span> getPopulation<\/span>()<\/span> :<\/span> String<\/span> {<\/span>\r\n        return<\/span> lang<\/span>.<\/span>getPopulation<\/span>(<\/span>name<\/span>,<\/span> population<\/span>)<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nclass<\/span> England<\/span>()<\/span> :<\/span> Country<\/span>(<\/span>\"England\"<\/span>,<\/span> English<\/span>(),<\/span> 53013000<\/span>)<\/span>\r\n\r\nfun<\/span> main<\/span>(<\/span>args<\/span>:<\/span> Array<\/span><<\/span>String<\/span>>)<\/span> {<\/span>\r\n    val<\/span> country<\/span> =<\/span> England<\/span>()<\/span>\r\n\r\n    println<\/span>(<\/span>country<\/span>.<\/span>name<\/span>)<\/span>\r\n    println<\/span>(<\/span>country<\/span>.<\/span>lang<\/span>.<\/span>getHelloWorld<\/span>(<\/span>\"world\"<\/span>))<\/span>\r\n    println<\/span>(<\/span>country<\/span>.<\/span>getPopulation<\/span>())<\/span>\r\n\r\n}<\/span>\r\n<\/code><\/pre>\n
            \u8fc5\u901f
            \n\u6211\u5c1d\u8bd5\u4f7f\u7528Swift\u8fdb\u884c\u4e86\u91cd\u5199\uff0c\u4f46\u662fSwift\u6ca1\u6709\u50cf\u62bd\u8c61\u7c7b\u90a3\u6837\u7684\u6982\u5ff5\uff0c\u6240\u4ee5\u6211\u89c9\u5f97\u6ca1\u6709\u592a\u5927\u7684\u5fc5\u8981\u53bb\u5b9e\u73b0Country\u7c7b\u3002
            \n\u4f7f\u7528\u534f\u8bae\u4f5c\u4e3a\u7c7b\u578b\u4e5f\u4e0d\u88ab\u63a8\u8350\uff08\u6216\u8005\u8bf4\u4e0d\u53ef\u884c\uff1f\uff09\uff0c\u6240\u4ee5\u6211\u8fd8\u662f\u51b3\u5b9a\u4e0d\u5f3a\u5236\u5728\u7236\u7c7b\u4e2d\u6dfb\u52a0lang\u5c5e\u6027\u3002<\/p>\n
            import<\/span> Foundation<\/span>\r\n\r\nprotocol<\/span> Lang<\/span> {<\/span>\r\n    var<\/span> name<\/span> :<\/span> String<\/span> {<\/span>get<\/span>}<\/span>\r\n    func<\/span> getHelloWorld<\/span>(<\/span>target<\/span> :<\/span>String<\/span>)<\/span> -><\/span> String<\/span>\r\n    func<\/span> getPopulation<\/span>(<\/span>countryName<\/span>:<\/span> String<\/span>,<\/span> population<\/span> :<\/span> Int<\/span>)<\/span> -><\/span> String<\/span>\r\n}<\/span>\r\n\r\nclass<\/span> English<\/span>:<\/span> Lang<\/span> {<\/span>\r\n\r\n    let<\/span> name<\/span> =<\/span> \"English\"<\/span>\r\n    func<\/span> getHelloWorld<\/span>(<\/span>target<\/span> :<\/span> String<\/span>)<\/span>  -><\/span> String<\/span> {<\/span>\r\n        return<\/span> \"Hello, <\/span>\\(<\/span>target<\/span>)<\/span>\"<\/span>\r\n    }<\/span>\r\n\r\n    func<\/span> getPopulation<\/span>(<\/span>countryName<\/span>:<\/span> String<\/span>,<\/span> population<\/span> :<\/span> Int<\/span>)<\/span> -><\/span> String<\/span> {<\/span>\r\n        return<\/span> \"<\/span>\\(<\/span>countryName<\/span>)<\/span> has a population of <\/span>\\(<\/span>population<\/span>)<\/span> people.\"<\/span>\r\n    }<\/span>\r\n}<\/span>\r\nclass<\/span> Country<\/span> {<\/span>\r\n    var<\/span> name<\/span> :<\/span> String<\/span> =<\/span> \"\"<\/span>\r\n    var<\/span> population<\/span> :<\/span> Int<\/span> =<\/span> 0<\/span>\r\n    init<\/span>(<\/span>_name<\/span> :<\/span> String<\/span>,<\/span> _population<\/span> :<\/span> Int<\/span>)<\/span> {<\/span>\r\n        name<\/span> =<\/span> _name<\/span>\r\n        population<\/span> =<\/span> _population<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nclass<\/span> England<\/span> :<\/span> Country<\/span> {<\/span>\r\n    var<\/span> lang<\/span> =<\/span> English<\/span>()<\/span>\r\n\r\n     init<\/span>()<\/span> {<\/span>\r\n        super<\/span>.<\/span>init<\/span>(<\/span>_name<\/span>:<\/span> \"England\"<\/span>,<\/span> _population<\/span>:<\/span> 53013000<\/span>)<\/span>\r\n    }<\/span>\r\n\r\n    func<\/span> getPopulation<\/span>()<\/span> -><\/span> String<\/span> {<\/span>\r\n        return<\/span> self<\/span>.<\/span>lang<\/span>.<\/span>getPopulation<\/span>(<\/span>countryName<\/span>:<\/span> name<\/span>,<\/span> population<\/span>:<\/span> population<\/span>)<\/span>\r\n    }<\/span>\r\n\r\n    func<\/span> getHelloWorld<\/span>(<\/span>target<\/span>:<\/span> String<\/span>)<\/span> -><\/span> String<\/span> {<\/span>\r\n        return<\/span> self<\/span>.<\/span>lang<\/span>.<\/span>getHelloWorld<\/span>(<\/span>target<\/span>:<\/span> target<\/span>)<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nvar<\/span> country<\/span> =<\/span> England<\/span>()<\/span>\r\n\r\nprint<\/span>(<\/span>country<\/span>.<\/span>name<\/span>)<\/span>\r\nprint<\/span>(<\/span>country<\/span>.<\/span>getHelloWorld<\/span>(<\/span>target<\/span>:<\/span> \"world\"<\/span>))<\/span>\r\nprint<\/span>(<\/span>country<\/span>.<\/span>getPopulation<\/span>())<\/span>\r\n\r\n<\/code><\/pre>\n
            Java
            \n\u57fa\u672c\u4e0a\u8207Kotlin\u76f8\u540c\uff0c\u4f46\u662f\u70ba\u4e86\u7b26\u5408Java\u7684\u6163\u4f8b\uff0c\u5c07\u5c6c\u6027\u8a2a\u554f\u8f49\u63db\u70bagetter\u3002\u56e0\u6b64\uff0c\u5f9e\u4ee3\u78bc\u4e0a\u4f86\u770b\uff0c\u76f8\u5c0d\u65bcKotlin\u800c\u8a00\uff0c\u5b83\u53ef\u80fd\u6703\u8b8a\u5f97\u66f4\u9577\u3002<\/p>\n
            interface<\/span> Lang<\/span> {<\/span>\r\n    public<\/span> String<\/span> getHelloWorld<\/span>(<\/span>String<\/span> target<\/span>);<\/span>\r\n    public<\/span> String<\/span> getPopulation<\/span>(<\/span>String<\/span> countryName<\/span>,<\/span> int<\/span> population<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
            class<\/span> English<\/span> implements<\/span> Lang<\/span> {<\/span>\r\n\r\n    private<\/span> String<\/span> name<\/span> =<\/span> \"English\"<\/span>;<\/span>\r\n\r\n    public<\/span> String<\/span> getName<\/span>()<\/span> {<\/span>\r\n         return<\/span> name<\/span>;<\/span>\r\n    }<\/span>\r\n\r\n    @Override<\/span>\r\n    public<\/span> String<\/span> getHelloWorld<\/span>(<\/span>String<\/span> target<\/span>)<\/span> {<\/span>\r\n        return<\/span> \"Hello, %TARGET%!\"<\/span>.<\/span>replace<\/span>(<\/span>\"%TARGET%\"<\/span>,<\/span> target<\/span>);<\/span>\r\n    }<\/span>\r\n\r\n    @Override<\/span>\r\n    public<\/span> String<\/span> getPopulation<\/span>(<\/span>String<\/span> countryName<\/span>,<\/span> int<\/span> population<\/span>)<\/span> {<\/span>\r\n    return<\/span>  \"%COUNTRY_NAME% has a population of %POPULATION% people.\"<\/span>\r\n        .<\/span>replace<\/span>(<\/span>\"%COUNTRY_NAME%\"<\/span>,<\/span> countryName<\/span>)<\/span>\r\n        .<\/span>replace<\/span>(<\/span>\"%POPULATION%\"<\/span>,<\/span> Integer<\/span>.<\/span>toString<\/span>(<\/span>population<\/span>));<\/span>\r\n    }<\/span>\r\n\r\n}<\/span>\r\n<\/code><\/pre>\n
            public<\/span> abstract<\/span> class<\/span> Country<\/span> {<\/span>\r\n    private<\/span> String<\/span> name<\/span>;<\/span>\r\n    private<\/span> Lang<\/span> lang<\/span>;<\/span>\r\n    private<\/span> int<\/span> population<\/span>;<\/span>\r\n\r\n    public<\/span> Country<\/span>(<\/span>String<\/span> _name<\/span>,<\/span> Lang<\/span> _lang<\/span>,<\/span> int<\/span> _population<\/span>)<\/span> {<\/span>\r\n        name<\/span> =<\/span> _name<\/span>;<\/span>\r\n        lang<\/span> =<\/span> _lang<\/span>;<\/span>\r\n        population<\/span> =<\/span> _population<\/span>;<\/span>\r\n    }<\/span>\r\n\r\n    public<\/span> String<\/span> getPopulation<\/span>()<\/span> {<\/span>\r\n        return<\/span> lang<\/span>.<\/span>getPopulation<\/span>(<\/span>name<\/span>,<\/span> population<\/span>);<\/span>\r\n    }<\/span>\r\n\r\n    public<\/span> String<\/span> getName<\/span>()<\/span> {<\/span>\r\n        return<\/span> name<\/span>;<\/span>\r\n    }<\/span>\r\n\r\n    public<\/span> Lang<\/span> getLang<\/span>()<\/span> {<\/span>\r\n        return<\/span> lang<\/span>;<\/span>\r\n    }<\/span>\r\n\r\n}<\/span>\r\n<\/code><\/pre>\n
            public<\/span> class<\/span> England<\/span> extends<\/span> Country<\/span> {<\/span>\r\n\r\n    public<\/span> static<\/span> final<\/span> String<\/span> NAME<\/span> =<\/span> \"England\"<\/span>;<\/span>\r\n    public<\/span> static<\/span> final<\/span> int<\/span> POPULATION<\/span> =<\/span> 53013000<\/span>;<\/span>\r\n\r\n    public<\/span> England<\/span>()<\/span> {<\/span>\r\n        super<\/span>(<\/span>NAME<\/span>,<\/span> new<\/span> English<\/span>(),<\/span> POPULATION<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
            class<\/span> ConstructorTest<\/span> {<\/span>\r\n\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> args<\/span>[])<\/span> {<\/span>\r\n        England<\/span> country<\/span> =<\/span> new<\/span> England<\/span>();<\/span>\r\n\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>country<\/span>.<\/span>getName<\/span>());<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>country<\/span>.<\/span>getLang<\/span>().<\/span>getHelloWorld<\/span>(<\/span>\"world\"<\/span>));<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>country<\/span>.<\/span>getPopulation<\/span>());<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
            \u7a7a\u503c\u5b89\u5168
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