{"id":31517,"date":"2024-01-09T02:57:38","date_gmt":"2023-02-15T17:28:29","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91%e5%a4%9a%e6%80%81%e6%80%a7\/"},"modified":"2024-05-04T17:27:58","modified_gmt":"2024-05-04T09:27:58","slug":"%e3%80%90java%e3%80%91%e5%a4%9a%e6%80%81%e6%80%a7","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91%e5%a4%9a%e6%80%81%e6%80%a7\/","title":{"rendered":"\u3010Java\u3011\u591a\u6001\u6027"},"content":{"rendered":"<h1>\u591a\u6001\u662f\u6307\u901a\u8fc7\u4e00\u4e2a\u7edf\u4e00\u7684\u63a5\u53e3\u6765\u4f7f\u7528\u4e0d\u540c\u7684\u5bf9\u8c61\u3002<\/h1>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u540c\u3058\u540d\u524d\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u7570\u306a\u308b\u6319\u52d5\u3092\u5b9f\u73fe<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Triangle,Rectangle\u30af\u30e9\u30b9\u3067Shape\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3057\u3001\u540c\u540d\u306egetArea\u30e1\u30bd\u30c3\u30c9\u3092\u5b9a\u7fa9<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u540c\u3058Shape\u578b\u306e\u5909\u6570\u3067\u3082\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u578b\u304c\u9055\u3046\u306e\u3067\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b\u306b\u5fdc\u3058\u3066\u57fa\u5e95\/\u6d3e\u751f\u30af\u30e9\u30b9\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u547c\u3070\u308c\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u2192\u7570\u306a\u308b\u6a5f\u80fd\u3092\u540c\u3058\u540d\u524d\u3067\u547c\u3076\u3053\u3068\u304c\u3067\u304d\u308b\uff01<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30e1\u30ea\u30c3\u30c8\uff1a<\/ul>\n<\/li>\n<\/ul>\n<p>\u4fdd\u5b88\u6027\u306b\u512a\u308c\u308b<\/p>\n<p>\u6a5f\u80fd\u306e\u5dee\u3057\u66ff\u3048\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u306e\u5dee\u3057\u66ff\u3048\u306e\u307f<\/p>\n<p>\u7406\u89e3\u3057\u3084\u3059\u3044<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Shape<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">protected<\/span> <span class=\"kt\">double<\/span> <span class=\"n\">width<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"kd\">protected<\/span> <span class=\"kt\">double<\/span> <span class=\"n\">height<\/span><span class=\"o\">;<\/span>\r\n\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">Shape<\/span><span class=\"o\">(<\/span><span class=\"kt\">double<\/span> <span class=\"n\">width<\/span><span class=\"o\">,<\/span> <span class=\"kt\">double<\/span> <span class=\"n\">height<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">width<\/span> <span class=\"o\">=<\/span> <span class=\"n\">width<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">height<\/span> <span class=\"o\">=<\/span> <span class=\"n\">height<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"c1\">\/\/\u56f3\u5f62\u306e\u9762\u7a4d\u3092\u53d6\u5f97\uff08\u6d3e\u751f\u30af\u30e9\u30b9\u3067\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3059\u308b\uff09<\/span>\r\n  <span class=\"kd\">public<\/span>  <span class=\"kt\">double<\/span> <span class=\"nf\">getArea<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"mi\">0<\/span><span class=\"n\">d<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"o\">}<\/span>\r\n  <span class=\"c1\">\/\/public abstract double getArea();<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Triangle<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">Shape<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">Triangle<\/span><span class=\"o\">(<\/span><span class=\"kt\">double<\/span> <span class=\"n\">width<\/span><span class=\"o\">,<\/span> <span class=\"kt\">double<\/span> <span class=\"n\">height<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kd\">super<\/span><span class=\"o\">(<\/span><span class=\"n\">width<\/span><span class=\"o\">,<\/span> <span class=\"n\">height<\/span><span class=\"o\">);<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"c1\">\/\/\u4e09\u89d2\u5f62\u306e\u9762\u7a4d\u53d6\u5f97<\/span>\r\n  <span class=\"nd\">@Override<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kt\">double<\/span> <span class=\"nf\">getArea<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">width<\/span> <span class=\"o\">*<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">height<\/span> <span class=\"o\">\/<\/span> <span class=\"mi\">2<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Rectangle<\/span> <span class=\"kd\">extends<\/span> <span class=\"nc\">Shape<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">Rectangle<\/span><span class=\"o\">(<\/span><span class=\"kt\">double<\/span> <span class=\"n\">width<\/span><span class=\"o\">,<\/span> <span class=\"kt\">double<\/span> <span class=\"n\">height<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kd\">super<\/span><span class=\"o\">(<\/span><span class=\"n\">width<\/span><span class=\"o\">,<\/span> <span class=\"n\">height<\/span><span class=\"o\">);<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"c1\">\/\/\u56db\u89d2\u5f62\u306e\u9762\u7a4d\u3092\u53d6\u5f97<\/span>\r\n  <span class=\"nd\">@Override<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kt\">double<\/span> <span class=\"nf\">getArea<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">width<\/span> <span class=\"o\">*<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">height<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">PolymorphismBasic<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"c1\">\/\/Triangle\u578b\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4ee3\u5165\uff08\u30a2\u30c3\u30d7\u30ad\u30e3\u30b9\u30c8\uff09 <\/span>\r\n    <span class=\"nc\">Shape<\/span> <span class=\"n\">tri<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Triangle<\/span><span class=\"o\">(<\/span><span class=\"mi\">10<\/span><span class=\"o\">,<\/span> <span class=\"mi\">50<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"c1\">\/\/Rectangle\u578b\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4ee3\u5165\uff08\u30a2\u30c3\u30d7\u30ad\u30e3\u30b9\u30c8\uff09 <\/span>\r\n    <span class=\"nc\">Shape<\/span> <span class=\"n\">rec<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Rectangle<\/span><span class=\"o\">(<\/span><span class=\"mi\">10<\/span><span class=\"o\">,<\/span> <span class=\"mi\">50<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">tri<\/span><span class=\"o\">.<\/span><span class=\"na\">getArea<\/span><span class=\"o\">());<\/span> <span class=\"c1\">\/\/250.0<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"n\">rec<\/span><span class=\"o\">.<\/span><span class=\"na\">getArea<\/span><span class=\"o\">());<\/span> <span class=\"c1\">\/\/500.0<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u62bd\u8c61\u65b9\u6cd5<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u4e0a\u306e\u4f8b\u3067\u306f\u57fa\u5e95\u30af\u30e9\u30b9Shape\u304cgetArea\u30e1\u30bd\u30c3\u30c9\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u671f\u5f85\u3057\u3066\u3044\u308b\u304c\u5f37\u5236\u3067\u306f\u306a\u3044<\/ul>\n<\/li>\n<\/ul>\n<p>\u62bd\u8c61\u30e1\u30bd\u30c3\u30c9\uff1a\u305d\u308c\u81ea\u4f53\u306f\u4e2d\u8eab\uff08\u6a5f\u80fd\uff09\u3092\u6301\u305f\u306a\u3044\u7a7a\u30e1\u30bd\u30c3\u30c9<\/p>\n<p>\u62bd\u8c61\u30af\u30e9\u30b9\uff1a\u62bd\u8c61\u30e1\u30bd\u30c3\u30c9\u3092\u542b\u3093\u3060\u30af\u30e9\u30b9<\/p>\n<p>\u62bd\u8c61\u30af\u30e9\u30b9\u3092\u7d99\u627f\u3057\u305f\u30af\u30e9\u30b9\u306f\u5168\u62bd\u8c61\u30e1\u30bd\u30c3\u30c9\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3059\u308b\u7fa9\u52d9\u3092\u6301\u3064<\/p>\n<p>\u62bd\u8c61\u30e1\u30bd\u30c3\u30c9\u306b\u3088\u3063\u3066\u7279\u5b9a\u306e\u30e1\u30bd\u30c3\u30c9\u304c\u6d3e\u751f\u30af\u30e9\u30b9\u3067\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3055\u308c\u308b\u3053\u3068\u3092\u4fdd\u8a3c\u3067\u304d\u308b<\/p>\n<h3>\u4f7f\u7528\u65b9\u6cd5<\/h3>\n<p>\u62bd\u8c61\u30e1\u30bd\u30c3\u30c9\u5b9a\u7fa9\u306b\u306fabstract\u4fee\u98fe\u5b50\u3092\u3064\u3051\u308b<\/p>\n<p>\u57fa\u5e95\u30af\u30e9\u30b9\u3067\u30d6\u30ed\u30c3\u30af\u4e2d\u8eab\u3092\u6301\u3064\u3053\u3068\u306f\u3067\u304d\u305a\u3001;\u3067\u5ba3\u8a00\u7d42\u4e86\u3059\u308b\u306e\u307f<\/p>\n<p>\u62bd\u8c61\u30e1\u30bd\u30c3\u30c9\u3092\u542b\u3093\u3060\u30af\u30e9\u30b9\u306b\u306fclass\u30d6\u30ed\u30c3\u30af\u306babstract\u4fee\u98fe\u5b50\u3092\u3064\u3051\u308b<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">abstract<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Shape<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">protected<\/span> <span class=\"kt\">double<\/span> <span class=\"n\">width<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"kd\">protected<\/span> <span class=\"kt\">double<\/span> <span class=\"n\">height<\/span><span class=\"o\">;<\/span>\r\n\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">Shape<\/span><span class=\"o\">(<\/span><span class=\"kt\">double<\/span> <span class=\"n\">width<\/span><span class=\"o\">,<\/span> <span class=\"kt\">double<\/span> <span class=\"n\">height<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">width<\/span> <span class=\"o\">=<\/span> <span class=\"n\">width<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">height<\/span> <span class=\"o\">=<\/span> <span class=\"n\">height<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"o\">}<\/span>\r\n <span class=\"c1\">\/\/\u57fa\u5e95\u30af\u30e9\u30b9\u3067\u4e2d\u8eab\u3092\u6301\u3064\u3053\u3068\u306f\u3067\u304d\u306a\u3044\uff01<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">abstract<\/span> <span class=\"kt\">double<\/span> <span class=\"nf\">getArea<\/span><span class=\"o\">();<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u754c\u9762<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Java\u3067\u306f\u591a\u91cd\u7d99\u627f\u3092\u8a8d\u3081\u306a\u3044\u306e\u3067\u3001\u4e00\u5ea6\u306b\u7d99\u627f\u3067\u304d\u308b\u30af\u30e9\u30b9\u306f\u5e38\u306b\uff11\u3064\u306e\u307f<\/ul>\n<\/li>\n<\/ul>\n<p>\u4e0d\u8981\u306a\u30e1\u30bd\u30c3\u30c9\u3082\u3068\u308a\u3042\u3048\u305a\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3057\u306a\u3044\u3068\u3044\u3051\u306a\u3044<\/p>\n<p>\u2192\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u4f7f\u3046<\/p>\n<p>\u914d\u4e0b\u30e1\u30bd\u30c3\u30c9\u304c\u5168\u90e8\u62bd\u8c61\u30e1\u30bd\u30c3\u30c9\u3067\u3042\u308b\u30af\u30e9\u30b9<br \/>\n\u591a\u91cd\u7d99\u627f\u304c\u53ef\u80fd<br \/>\n\u305d\u308c\u305e\u308c\u306e\u30e1\u30bd\u30c3\u30c9\u306f\u610f\u5473\u7684\u306a\u584a\u3067\u7570\u306a\u308b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u632f\u308a\u5206\u3051\u308b<br \/>\n\u6d3e\u751f\u30af\u30e9\u30b9\u5074\u3067\u5fc5\u8981\u306a\u30e1\u30bd\u30c3\u30c9\u306e\u307f\u9078\u629e\u3067\u304d\u308b<\/p>\n<h3>\u63a5\u53e3\u7684\u5b9a\u4e49<\/h3>\n<p>interface\u547d\u4ee4<\/p>\n<p>public\uff1a\u5168\u30af\u30e9\u30b9\u304b\u3089\u30a2\u30af\u30bb\u30b9\u53ef\u80fd<\/p>\n<p>abstract\uff1a\u62bd\u8c61\u30af\u30e9\u30b9<\/p>\n<p>strictfp\uff1a\u6d6e\u52d5\u5c0f\u6570\u70b9\u3092\u74b0\u5883\u4f9d\u5b58\u3057\u306a\u3044\u65b9\u6cd5\u3067\u6f14\u7b97<\/p>\n<p>\u914d\u4e0b\u306b\u62bd\u8c61\u30e1\u30bd\u30c3\u30c9\u3092\u542b\u3080\u306e\u306f\u660e\u3089\u304b\u306a\u306e\u3067abstruat\u306f\u3064\u3051\u306a\u304f\u3066\u3082\u540c\u3058\uff08\u4e00\u822c\u7684\u306b\u7701\u7565\uff09<br \/>\n\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u540d\u306fPascal\u8a18\u6cd5<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">interface<\/span> <span class=\"nc\">Shape<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kt\">double<\/span> <span class=\"nf\">getArea<\/span><span class=\"o\">();<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h3>\u5b9a\u4e49\u6f5c\u5728\u6210\u5458<\/h3>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u62bd\u8c61\u30e1\u30bd\u30c3\u30c9<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">default\u30e1\u30bd\u30c3\u30c9<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30af\u30e9\u30b9\u30e1\u30bd\u30c3\u30c9<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5b9a\u6570\u30d5\u30a3\u30fc\u30eb\u30c9<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u5165\u308c\u5b50static\u30af\u30e9\u30b9\/\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9<\/ul>\n<h3>\u63a5\u53e3\u5b9e\u73b0<\/h3>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5b9a\u7fa9\u6e08\u307f\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u7d99\u627f\u3057\u3066\u30af\u30e9\u30b9\u3092\u5b9a\u7fa9\u3059\u308b\u3053\u3068<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u5b9f\u88c5\u3057\u305f\u30af\u30e9\u30b9\u3092\u5b9f\u88c5\u30af\u30e9\u30b9\u3068\u3044\u3046<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">implements \u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u540d<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u8907\u6570\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u5b9f\u88c5\u3059\u308b\u6642\u306fimplements Shape, Hoge, Bar<\/ul>\n<\/li>\n<\/ul>\n<p>\u7d99\u627f\u3068\u7d44\u307f\u5408\u308f\u305b\u3066extends MyParent implements Shape<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/Shape\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306e\u5b9f\u88c5\u30af\u30e9\u30b9<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">Rectangle<\/span> <span class=\"kd\">implements<\/span> <span class=\"nc\">Shape<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">private<\/span> <span class=\"kt\">double<\/span> <span class=\"n\">width<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"kd\">private<\/span> <span class=\"kt\">double<\/span> <span class=\"n\">height<\/span><span class=\"o\">;<\/span>\r\n\r\n  <span class=\"kd\">public<\/span> <span class=\"nf\">Rectangle<\/span><span class=\"o\">(<\/span><span class=\"kt\">double<\/span> <span class=\"n\">width<\/span><span class=\"o\">,<\/span> <span class=\"kt\">double<\/span> <span class=\"n\">height<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">width<\/span> <span class=\"o\">=<\/span> <span class=\"n\">width<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">height<\/span> <span class=\"o\">=<\/span> <span class=\"n\">height<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"o\">}<\/span>\r\n\r\n  <span class=\"nd\">@Override<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kt\">double<\/span> <span class=\"nf\">getArea<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">width<\/span> <span class=\"o\">*<\/span> <span class=\"k\">this<\/span><span class=\"o\">.<\/span><span class=\"na\">height<\/span><span class=\"o\">;<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h3>\u63a5\u53e3\u6210\u5458 (Ji\u00e9<\/h3>\n<ul class=\"post-ul\">\u62bd\u8c61\u30e1\u30bd\u30c3\u30c9\u3001\u5b9a\u6570\u30d5\u30a3\u30fc\u30eb\u30c9\u3001default\u30e1\u30bd\u30c3\u30c9\u3001static\u30e1\u30bd\u30c3\u30c9\uff08Java8\u4ee5\u964d\uff09<\/ul>\n<h4>\u5e38\u6570\u5b57\u6bb5<\/h4>\n<p>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306f\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u5316\u3067\u304d\u306a\u3044\u306e\u3067\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u5b9a\u7fa9\u4e0d\u53ef<br \/>\n\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u7121\u6761\u4ef6\u306bpublic static final<\/p>\n<p>\u5197\u9577\u306a\u306e\u3067\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u304f<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">interface<\/span> <span class=\"nc\">MyApp<\/span><span class=\"o\">{<\/span>\r\n    <span class=\"nc\">String<\/span> <span class=\"no\">TITLE<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"\u4e0d\u6b7b\u9ce5\u306e\u9a0e\u58eb\u56e3\"<\/span><span class=\"o\">;<\/span>\r\n    <span class=\"kt\">double<\/span> <span class=\"no\">NUMBER<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">5<\/span><span class=\"o\">;<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h4>\u9759\u6001\u5b57\u6bb5\uff08Java8\u53ca\u4ee5\u4e0a\u7248\u672c\uff09<\/h4>\n<ul class=\"post-ul\">\u65e2\u5b58\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306b\u95a2\u9023\u3057\u3066\u4f55\u3089\u304b\u306e\u6a5f\u80fd\u3092\u307e\u3068\u3081\u3066\u304a\u304d\u305f\u3044\u6642<\/ul>\n<h4>\u9ed8\u8ba4\u65b9\u6cd5\uff08Java8\u53ca\u4ee5\u4e0a\u7248\u672c\uff09<\/h4>\n<ul class=\"post-ul\">\u5b9f\u88c5\u30af\u30e9\u30b9\u5074\u3067\u660e\u793a\u7684\u306b\u5b9f\u88c5\u3055\u308c\u306a\u3044\u5834\u5408\u65e2\u5b9a\u3067\u63a1\u7528\u3055\u308c\u308b\u5b9f\u88c5<\/ul>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">interface<\/span> <span class=\"nc\">Loggable<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"k\">default<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">log<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">msg<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"Log: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">msg<\/span><span class=\"o\">);<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/log\u30e1\u30bd\u30c3\u30c9\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3057\u306a\u3044<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">LoggableImpl<\/span> <span class=\"kd\">implements<\/span> <span class=\"nc\">Loggable<\/span> <span class=\"o\">{<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">InterfaceDefault<\/span> <span class=\"o\">{<\/span>\r\n\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kt\">var<\/span> <span class=\"n\">l<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">LoggableImpl<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"c1\">\/\/Loggable\u30af\u30e9\u30b9\u306edefault\u30e1\u30bd\u30c3\u30c9\u304c\u547c\u3070\u308c\u308b<\/span>\r\n    <span class=\"n\">l<\/span><span class=\"o\">.<\/span><span class=\"na\">log<\/span><span class=\"o\">(<\/span><span class=\"s\">\"Harry Potter\"<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/Log:Harry Potter<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">super\u3067\u660e\u793a\u7684\u306b\u5b9f\u88c5\u30af\u30e9\u30b9\u304b\u3089default\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3076\u3053\u3068\u3082\u3067\u304d\u308b<\/ul>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/log\u30e1\u30bd\u30c3\u30c9\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3057\u306a\u3044<\/span>\r\n<span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">LoggableImpl<\/span> <span class=\"kd\">implements<\/span> <span class=\"nc\">Loggable<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"nd\">@Override<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">log<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">msg<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"nc\">Loggable<\/span><span class=\"o\">.<\/span><span class=\"na\">super<\/span><span class=\"o\">.<\/span><span class=\"na\">log<\/span><span class=\"o\">(<\/span><span class=\"n\">msg<\/span><span class=\"o\">);<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"LogImpl: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">msg<\/span><span class=\"o\">);<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">InterfaceDefault<\/span> <span class=\"o\">{<\/span>\r\n\r\n  <span class=\"kd\">public<\/span> <span class=\"kd\">static<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">main<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span><span class=\"o\">[]<\/span> <span class=\"n\">args<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"kt\">var<\/span> <span class=\"n\">l<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">LoggableImpl<\/span><span class=\"o\">();<\/span>\r\n    <span class=\"n\">l<\/span><span class=\"o\">.<\/span><span class=\"na\">log<\/span><span class=\"o\">(<\/span><span class=\"s\">\"Harry Potter\"<\/span><span class=\"o\">);<\/span> \r\n    <span class=\"c1\">\/\/Log:Harry Potter<\/span>\r\n    <span class=\"c1\">\/\/LogImpl:Harry Potter<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h3>\u591a\u91cd\u7ee7\u627f\u7684\u6ce8\u610f\u4e8b\u9879<\/h3>\n<h4>\u62bd\u8c61\u65b9\u6cd5\u91cd\u590d\u4e86<\/h4>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30e1\u30bd\u30c3\u30c9\u540d\u3068\u5f15\u6570\u578b\u304c\u540c\u3058\u3067\u623b\u308a\u5024\u306e\u307f\u7570\u306a\u308b\u3068\u304d\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u5b9f\u88c5\u5074\u306e\u623b\u308a\u5024\u306f\u6700\u4e0b\u4f4d\u306e\u6d3e\u751f\u578b\u3067\u3042\u308b\u5fc5\u8981<\/ul>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">interface<\/span> <span class=\"nc\">IHoge<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kt\">void<\/span> <span class=\"nf\">foo<\/span><span class=\"o\">();<\/span>\r\n  <span class=\"c1\">\/\/CharSequence foo(); \/\/OK<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">interface<\/span> <span class=\"nc\">IHoge2<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"nc\">String<\/span> <span class=\"nf\">foo<\/span><span class=\"o\">();<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">HogeImpl<\/span> <span class=\"kd\">implements<\/span> <span class=\"nc\">IHoge<\/span><span class=\"o\">,<\/span> <span class=\"nc\">IHoge2<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"nd\">@Override<\/span>\r\n    <span class=\"kd\">public<\/span> <span class=\"nc\">String<\/span> <span class=\"nf\">foo<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span> <span class=\"o\">}<\/span> <span class=\"c1\">\/\/\u623b\u308a\u5024\u306e\u578b\u304cIHoge.foo()\u3068\u4e92\u63db\u6027\u306a\u3057<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h4>\u5728\u4e2d\u56fd\u5f53\u5730\u7684\u4e2d\u6587\u4e2d\u8fdb\u884c\u6539\u8ff0\uff1a\u5b9a\u6570\u5b57\u6bb5\u6709\u91cd\u590d\u3002<\/h4>\n<ul class=\"post-ul\">\u30c7\u30fc\u30bf\u578b\u304c\u7570\u306a\u308b\u5834\u5408\u3082\u3001\u578b\/\u5024\u304c\u7b49\u3057\u3044\u5834\u5408\u3082\u3001\u53c2\u7167\u6642\u30a8\u30e9\u30fc<\/ul>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">interface<\/span> <span class=\"nc\">Hoge<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kt\">int<\/span> <span class=\"no\">DATA<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"o\">;<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">interface<\/span> <span class=\"nc\">Hoge2<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"nc\">String<\/span> <span class=\"no\">DATA<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"This is an apple.\"<\/span><span class=\"o\">;<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">HogeImpl<\/span> <span class=\"kd\">implements<\/span> <span class=\"nc\">Hoge<\/span><span class=\"o\">,<\/span> <span class=\"nc\">Hoge2<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">foo<\/span><span class=\"o\">()<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"no\">DATA<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/\u30a8\u30e9\u30fc<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h4>\u9ed8\u8ba4\u65b9\u6cd5\u91cd\u590d<\/h4>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5b9f\u88c5\u3092\u6301\u3064\u306e\u3067\u30e1\u30bd\u30c3\u30c9\u540d\u3001\u5f15\u6570\u3001\u623b\u308a\u5024\u5168\u90e8\u5408\u81f4\u3057\u305f\u5834\u5408\u3082\u30a8\u30e9\u30fc<\/ul>\n<\/li>\n<\/ul>\n<p>super\u3067\u5b9f\u88c5\u30af\u30e9\u30b9\u3067\u660e\u793a\u7684\u306bdefalt\u30e1\u30bd\u30c3\u30c9\u3092\u53c2\u7167\u3059\u308b\u3053\u3068\u306fOK<br \/>\n\u968e\u5c64\u95a2\u4fc2\u306b\u5dee\u304c\u3042\u308b\u5834\u5408\u3001\u540c\u540d\u306edefault\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u3082OK<br \/>\n\u3088\u308a\u8fd1\u3044\u5b9f\u88c5\u95a2\u4fc2(\u76f4\u63a5\u5b9f\u88c5\u95a2\u4fc2)\u306b\u3042\u308b\u30af\u30e9\u30b9\u304c\u512a\u5148<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">interface<\/span> <span class=\"nc\">DHoge<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"k\">default<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">log<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">msg<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"DHoge: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">msg<\/span><span class=\"o\">);<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">interface<\/span> <span class=\"nc\">DHoge2<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"k\">default<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">log<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">msg<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"nc\">System<\/span><span class=\"o\">.<\/span><span class=\"na\">out<\/span><span class=\"o\">.<\/span><span class=\"na\">println<\/span><span class=\"o\">(<\/span><span class=\"s\">\"DHoge2: \"<\/span> <span class=\"o\">+<\/span> <span class=\"n\">msg<\/span><span class=\"o\">);<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"kd\">public<\/span> <span class=\"kd\">class<\/span> <span class=\"nc\">HogeImpl<\/span> <span class=\"kd\">implements<\/span> <span class=\"nc\">DHoge<\/span><span class=\"o\">,<\/span> <span class=\"nc\">DHoge2<\/span> <span class=\"o\">{<\/span>\r\n  <span class=\"nd\">@Override<\/span>\r\n  <span class=\"kd\">public<\/span> <span class=\"kt\">void<\/span> <span class=\"nf\">log<\/span><span class=\"o\">(<\/span><span class=\"nc\">String<\/span> <span class=\"n\">msg<\/span><span class=\"o\">)<\/span> <span class=\"o\">{<\/span>\r\n    <span class=\"nc\">DHoge<\/span><span class=\"o\">.<\/span><span class=\"na\">super<\/span><span class=\"o\">.<\/span><span class=\"na\">log<\/span><span class=\"o\">(<\/span><span class=\"n\">msg<\/span><span class=\"o\">);<\/span> <span class=\"c1\">\/\/\u30a8\u30e9\u30fc\uff08String\u3092\u6301\u3064\u91cd\u8907\u3057\u305fdefault\u30e1\u30bd\u30c3\u30c9log\u306fDHoge2,DHoge\u304b\u3089\u7d99\u627f\u3055\u308c\u3066\u3044\u308b\uff09<\/span>\r\n    <span class=\"c1\">\/\/IHoge.super.log(msg); \/\/\u660e\u793a\u7684\u306b\u53c2\u7167\u306fOK<\/span>\r\n  <span class=\"o\">}<\/span>\r\n<span class=\"o\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u4f7f\u7528\u63a5\u53e3\u8fd8\u662f\u62bd\u8c61\u7c7b\uff1f<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u512a\u5148<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30af\u30e9\u30b9\u306fObject\u30af\u30e9\u30b9\u3092root\u3068\u3057\u3044\u305f\u30c4\u30ea\u30fc\u968e\u5c64\u306b\u306a\u3063\u3066\u3044\u308b<\/ul>\n<\/li>\n<\/ul>\n<p>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\uff1a\u30af\u30e9\u30b9\u30c4\u30ea\u30fc\u304b\u3089\u72ec\u7acb<\/p>\n<p>\u62bd\u8c61\u30af\u30e9\u30b9\uff1a\u30af\u30e9\u30b9\u30c4\u30ea\u30fc\u306e\u4e00\u90e8\u3092\u69cb\u6210<\/p>\n<p>\u578b\u968e\u5c64\u306f\u73fe\u5b9f\u5168\u3066\u306e\u8868\u73fe\u3067\u306f\u306a\u3044<\/p>\n<p>\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u306a\u3089<\/p>\n<p>\u578b\u968e\u5c64\u304b\u3089\u72ec\u7acb\u3057\u3066\u3044\u308b\u306e\u3067\u7279\u5b9a\u306e\u6a5f\u80fd\u3092\u5272\u308a\u8fbc\u307e\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b<\/p>\n<p>\u57fa\u5e95\u30af\u30e9\u30b9\u306b\u3088\u3089\u305a\u65b0\u305f\u306a\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9f\u88c5\u53ef\u80fd<br \/>\n\u591a\u91cd\u7d99\u627f\u53ef\u80fd<\/p>\n<p>\u62bd\u8c61\u30af\u30e9\u30b9\u306e\u5834\u5408\u3001<\/p>\n<p>\u95a2\u4fc2\u30af\u30e9\u30b9\u3092\u6d17\u3044\u51fa\u3057\u5168\u90e8\u306e\u4e0a\u4f4d\u30af\u30e9\u30b9\u3068\u306a\u308b\u4f4d\u7f6e\u306b\u5165\u308c\u308b\u5fc5\u8981<br \/>\n\u9014\u4e2d\u306b\u5fc5\u8981\u306a\u3044\u6a5f\u80fd\u304c\u3042\u3063\u3066\u3082\u7d99\u627f\u3092\u62d2\u5426\u3067\u304d\u306a\u3044<\/p>\n<p>\u63a1\u7528\u3059\u308b\u3068\u304d\u306f\u30af\u30e9\u30b9\u304c\u3069\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u6301\u3064\u304b\uff08\u30af\u30e9\u30b9\u306e\u632f\u308b\u821e\u3044\uff09\u3088\u308a\u3001\u5b9f\u88c5\u306b\u76ee\u3092\u5411\u3051\u308b\u3079\u304d<br \/>\n*\u6d3e\u751f\u30af\u30e9\u30b9\u3067\u306e\u5171\u901a\u51e6\u7406<\/p>\n<p>\u5b9f\u88c5\u51e6\u7406\u306e\u9aa8\u683c<\/p>\n<p>ex: java.io\u30d1\u30c3\u30b1\u30fc\u30b8\u306eWriter\u30af\u30e9\u30b9\u3067\u306fBufferWriter,OutputStreamWriter,PrintWriter\u306e\u57fa\u5e95\u30af\u30e9\u30b9\u3067XWriter\u67a0\u7d44\u307f\u3092\u63d0\u4f9b<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u591a\u6001\u662f\u6307\u901a\u8fc7\u4e00\u4e2a\u7edf\u4e00\u7684\u63a5\u53e3\u6765\u4f7f\u7528\u4e0d\u540c\u7684\u5bf9\u8c61\u3002 \u540c\u3058\u540d\u524d\u306e\u30e1\u30bd\u30c3\u30c9\u3067\u7570\u306a\u308b\u6319\u52d5\u3092\u5b9f\u73fe &nbsp; Triang [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-31517","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ 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\/>\n<meta property=\"article:published_time\" content=\"2023-02-15T17:28:29+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-05-04T09:27:58+00:00\" \/>\n<meta name=\"author\" content=\"\u6587, \u7fd4\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u6587, \u7fd4\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91%e5%a4%9a%e6%80%81%e6%80%a7\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java%e3%80%91%e5%a4%9a%e6%80%81%e6%80%a7\/\",\"name\":\"\u3010Java\u3011\u591a\u6001\u6027 - Blog - Silicon 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