{"id":1381,"date":"2025-08-21T16:20:11","date_gmt":"2025-08-21T08:20:11","guid":{"rendered":"https:\/\/zero-zl.cn\/?p=1381"},"modified":"2025-08-21T22:22:14","modified_gmt":"2025-08-21T14:22:14","slug":"java-se%e8%af%ad%e6%b3%95","status":"publish","type":"post","link":"https:\/\/zero-zl.cn\/index.php\/2025\/08\/21\/java-se%e8%af%ad%e6%b3%95\/","title":{"rendered":"Java SE\u8bed\u6cd5"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" id=\"_1\u3001java-\u6709\u6ca1\u6709-goto-\u8bed\u53e5\"><a href=\"#_1\u3001java-\u6709\u6ca1\u6709-goto-\u8bed\u53e5\">1\u3001Java \u6709\u6ca1\u6709 goto \u8bed\u53e5\uff1f<\/a><\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">goto\u662f Java \u4e2d\u7684\u4fdd\u7559\u5b57\uff0c\u5728\u76ee\u524d\u7248\u672c\u7684 Java \u4e2d\u6ca1\u6709\u4f7f\u7528\u3002\u6839\u636e James Gosling Java \u4e4b\u7236\uff09\u7f16\u5199\u7684\u300a The Java Programming Language \u300b\u4e00\u4e66\u7684\u9644\u5f55\u4e2d\u7ed9\u51fa\u4e86\u4e00\u4e2a Java \u5173\u952e\u5b57\u5217\u8868\uff0c\u5176\u4e2d\u6709 goto \u548c const \uff0c\u4f46\u662f\u8fd9\u4e24\u4e2a\u662f\u76ee\u524d\u65e0\u6cd5\u4f7f\u7528\u7684\u5173\u952e\u5b57\uff0c\u56e0\u6b64\u6709\u4e9b\u5730\u65b9\u5c06\u5176\u79f0\u4e4b\u4e3a\u4fdd\u7559\u5b57\uff0c\u5176\u5b9e\u4fdd\u7559\u5b57\u8fd9\u4e2a\u8bcd\u5e94\u8be5\u6709\u66f4\u5e7f\u6cdb\u7684\u610f\u4e49\uff0c\u56e0\u4e3a\u719f\u6089 C \u8bed\u8a00\u7684\u7a0b\u5e8f\u5458\u90fd\u77e5\u9053\uff0c\u5728\u7cfb\u7edf\u7c7b\u5e93\u4e2d\u4f7f \u7528\u8fc7\u7684\u6709\u7279\u6b8a\u610f\u4e49\u7684\u5355\u8bcd\u6216\u5355\u8bcd\u7684\u7ec4\u5408\u90fd\u88ab\u89c6\u4e3a\u4fdd\u7559\u5b57 \u3002<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"_2\u3001-\u548c-\u7684\u533a\u522b\"><a href=\"#_2\u3001-\u548c-\u7684\u533a\u522b\">2\u3001&amp; \u548c &amp;&amp; \u7684\u533a\u522b<\/a><\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">&amp;\u8fd0\u7b97\u7b26\u6709\u4e24\u79cd\u7528\u6cd5\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6309\u4f4d\u4e0e<\/li>\n\n\n\n<li>\u903b\u8f91\u4e0e<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>&amp;&amp;\u8fd0\u7b97\u7b26\u662f\u77ed\u8def\u4e0e\u8fd0\u7b97<\/strong>\u3002\u903b\u8f91\u4e0e\u8ddf\u77ed\u8def\u4e0e\u7684\u5dee\u522b\u662f\u975e\u5e38 \u5de8\u5927\u7684\uff0c\u867d\u7136\u4e8c\u8005\u90fd\u8981\u6c42\u8fd0\u7b97\u7b26\u5de6\u53f3\u4e24\u7aef\u7684\u5e03\u5c14\u503c\u90fd\u662ftrue \u6574\u4e2a\u8868\u8fbe\u5f0f\u7684\u503c\u624d\u662f true<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&amp;&amp;\u4e4b\u6240\u4ee5\u79f0\u4e3a\u77ed\u8def \u8fd0\u7b97\u662f\u56e0\u4e3a\uff0c\u5982\u679c \u5de6\u8fb9\u7684\u8868\u8fbe\u5f0f\u7684\u503c\u662f false \uff0c\u53f3\u8fb9\u7684\u8868\u8fbe\u5f0f\u4f1a\u88ab\u76f4\u63a5\u77ed\u8def\u6389\uff0c\u4e0d\u4f1a\u8fdb\u884c\u8fd0\u7b97\u3002\u5f88\u591a\u65f6\u5019 \u6211\u4eec\u53ef\u80fd\u90fd\u9700\u8981\u7528 \u800c\u4e0d\u662f &amp;&amp;\uff0c\u4f8b\u5982\u5728\u9a8c\u8bc1\u7528\u6237\u767b\u5f55\u65f6\u5224\u5b9a\u7528\u6237\u540d\u4e0d\u662f null \u800c\u4e14\u4e0d\u662f\u7a7a\u5b57\u7b26\u4e32\uff0c\u5e94\u5f53\u5199\u4e3a username != null &amp;&amp;!username.equals(\"\") equals(\"\")\uff0c\u4e8c\u8005\u7684\u987a\u5e8f\u4e0d\u80fd\u4ea4\u6362\uff0c\u66f4\u4e0d\u80fd\u7528 \u8fd0\u7b97\u7b26\uff0c\u56e0\u4e3a\u7b2c\u4e00\u4e2a\u6761\u4ef6\u5982\u679c\u4e0d \u6210\u7acb\uff0c\u6839\u672c\u4e0d\u80fd\u8fdb\u884c\u5b57\u7b26\u4e32\u7684 equals \u6bd4\u8f83\uff0c\u5426\u5219\u4f1a\u4ea7\u751f NullPointerException \u5f02\u5e38\u3002\n\u6ce8\u610f\uff1a\u903b\u8f91\u6216\u8fd0\u7b97\u7b26\uff08|\uff09\u548c\u77ed\u8def\u6216\u8fd0\u7b97\u7b26\uff08||)\u7684\u5dee\u522b\u4e5f\u662f\u5982\u6b64\u3002<\/code><\/pre>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"_3\u3001\u5728-java-\u4e2d-\u5982\u4f55\u8df3\u51fa\u5f53\u524d\u7684\u591a\u91cd\u5d4c\u5957\u5faa\u73af\"><a href=\"#_3\u3001\u5728-java-\u4e2d-\u5982\u4f55\u8df3\u51fa\u5f53\u524d\u7684\u591a\u91cd\u5d4c\u5957\u5faa\u73af\">3\u3001\u5728 Java \u4e2d\uff0c\u5982\u4f55\u8df3\u51fa\u5f53\u524d\u7684\u591a\u91cd\u5d4c\u5957\u5faa\u73af\uff1f<\/a><\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u4f7f\u7528\u6807\u7b7e\u8df3\u51fa\u5faa\u73af\uff0c\u5728\u6700\u5916\u5c42\u5faa\u73af\u524d\u52a0\u4e00\u4e2a\u6807\u8bb0\u5982A \uff0c\u7136\u540e\u7528 break A; \u53ef\u4ee5\u8df3\u51fa\u591a\u91cd\u5faa\u73af\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>loop: for (int i = 0; i &lt; 10; i++) { \n for (int j = 0; j &lt; 10; j++) { \n     for (int k = 0; k &lt; 10; k++) { \n         for (int h = 0; h &lt; 10; h++) { \n             if (h == 6) { \n                 break loop; \n             } \n             System.out.print(h); \n         } \n     } \n } \n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u6b21\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>break\u662f\u8df3\u51fa\u5f53\u524dfor\u5faa\u73af<\/li>\n\n\n\n<li>continue\u662f\u8df3\u51fa\u5f53\u524d\u5faa\u73af\uff0c\u5f00\u59cb\u4e0b\u4e00\u5faa\u73af<\/li>\n<\/ul>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"_4\u3001\u4e24\u4e2a\u5bf9\u8c61\u503c\u76f8\u540c-x-equals-y-true-\u4f46\u5374\u53ef\u6709\u4e0d\u540c\u7684-hashcode-\u8fd9\u53e5\"><a href=\"#_4\u3001\u4e24\u4e2a\u5bf9\u8c61\u503c\u76f8\u540c-x-equals-y-true-\u4f46\u5374\u53ef\u6709\u4e0d\u540c\u7684-hashcode-\u8fd9\u53e5\">4\u3001\u4e24\u4e2a\u5bf9\u8c61\u503c\u76f8\u540c (x.equals(y) == true) \uff0c\u4f46\u5374\u53ef\u6709\u4e0d\u540c\u7684 hashCode \u8fd9\u53e5<\/a><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8bdd\u5bf9\u4e0d\u5bf9\uff1f<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u4e0d\u5bf9\u3002\u5982\u679cx.equals(y) == true\uff0c\u5219\u5b83\u4eec\u7684\u54c8\u5e0c\u7801\u5e94\u5f53\u76f8\u540c<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Java\u5bf9\u4e8e eqauls \u65b9\u6cd5\u548c hashCode \u65b9\u6cd5\u662f\u8fd9\u6837\u89c4\u5b9a\u7684\uff1a\n(1)\u5982\u679c\u4e24\u4e2a\u5bf9\u8c61\u76f8\u540c\uff08 equals \u65b9\u6cd5\u8fd4\u56de true \uff09\uff0c\u90a3\u4e48\u5b83\u4eec\u7684 hashCode \u503c\u4e00\u5b9a\u8981\u76f8\u540c\uff1b\n(2)\u5982\u679c\u4e24\u4e2a\u5bf9\u8c61\u7684 hashCode \u76f8\u540c\uff0c\u5b83\u4eec\u5e76\u4e0d\u4e00\u5b9a\u76f8\u540c\u3002\u5f53\u7136\uff0c\u4f60\u672a\u5fc5\u8981\u6309\u7167\u8981\u6c42\u53bb\u505a\uff0c\u4f46\u662f\u5982\u679c\u4f60\u8fdd\u80cc\u4e86\u4e0a\u8ff0\u539f\u5219\u5c31\u4f1a\u53d1\u73b0\u5728\u4f7f\u7528\u5bb9\u5668\u65f6\uff0c\u76f8\u540c\u7684\u5bf9\u8c61\u53ef\u4ee5\u51fa\u73b0\u5728 Set \u96c6\u5408\u4e2d\uff0c\u540c\u65f6\u589e\u52a0\u65b0\u5143\u7d20\u7684\u6548\u7387\u4f1a\u5927\u5927\u4e0b\u964d\uff08\u5bf9\u4e8e\u4f7f\u7528\u54c8\u5e0c\u5b58\u50a8\u7684\u7cfb\u7edf\uff0c\u5982\u679c\u54c8\u5e0c\u7801\u9891\u7e41\u7684\u51b2\u7a81\u5c06\u4f1a\u9020\u6210\u5b58\u53d6\u6027\u80fd\u6025\u5267\u4e0b\u964d\uff09\u3002<\/code><\/pre>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u9996\u5148equals \u65b9\u6cd5\u5fc5\u987b\u6ee1\u8db3<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u81ea\u53cd\u6027\uff08 x.equals(x) \u5fc5\u987b\u8fd4\u56de true \uff09<\/li>\n\n\n\n<li>\u5bf9\u79f0\u6027 x.equals(y) \u8fd4\u56de true \u65f6\uff0c y.equals(x)\u4e5f\u5fc5\u987b\u8fd4\u56de true \uff09<\/li>\n\n\n\n<li>\u4f20\u9012\u6027 x .equals( \u548c y.equals(z) \u90fd\u8fd4\u56de true \u65f6\uff0c x.equals(z) \u4e5f\u5fc5\u987b\u8fd4\u56de true \uff09<\/li>\n\n\n\n<li>\u4e00\u81f4\u6027\uff08\u5f53x \u548c y \u5f15\u7528\u7684\u5bf9\u8c61\u4fe1\u606f\u6ca1\u6709\u88ab\u4fee\u6539\u65f6\uff0c\u591a\u6b21\u8c03\u7528 x.equals(y) \u5e94\u8be5\u5f97\u5230\u540c\u6837\u7684\u8fd4\u56de\u503c\uff09<\/li>\n\n\n\n<li>\u800c\u4e14\u5bf9\u4e8e\u4efb\u4f55\u975e null \u503c\u7684\u5f15\u7528 x x.equals(null) \u5fc5\u987b\u8fd4\u56de false \u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5b9e\u73b0\u9ad8\u8d28\u91cf\u7684 equals \u65b9\u6cd5\u7684\u8bc0\u7a8d\u5305\u62ec<\/strong>\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4f7f\u7528 \u64cd\u4f5c\u7b26\u68c0\u67e5 \u53c2\u6570\u662f\u5426\u4e3a\u8fd9\u4e2a\u5bf9\u8c61\u7684\u5f15\u7528<\/li>\n\n\n\n<li>\u4f7f\u7528 instanceof \u64cd\u4f5c\u7b26\u68c0\u67e5 \u53c2\u6570\u662f\u5426\u4e3a\u6b63\u786e\u7684\u7c7b\u578b<\/li>\n\n\n\n<li>\u5bf9\u4e8e\u7c7b\u4e2d\u7684\u5173\u952e\u5c5e\u6027\uff0c\u68c0\u67e5\u53c2\u6570\u4f20\u5165\u5bf9\u8c61\u7684\u5c5e\u6027\u662f\u5426\u4e0e\u4e4b\u76f8\u5339\u914d\uff1b<\/li>\n\n\n\n<li>\u7f16\u5199\u5b8c equals \u65b9\u6cd5\u540e\uff0c\u95ee\u81ea\u5df1\u5b83\u662f\u5426\u6ee1\u8db3\u5bf9\u79f0\u6027\u3001\u4f20\u9012\u6027\u3001\u4e00\u81f4\u6027\uff1b<\/li>\n\n\n\n<li>\u91cd\u5199 equals \u65f6\u603b\u662f\u8981\u91cd\u5199 hashCode<\/li>\n\n\n\n<li>\u4e0d\u8981\u5c06 equals \u65b9\u6cd5\u53c2\u6570\u4e2d\u7684 Object \u5bf9\u8c61\u66ff\u6362\u4e3a\u5176\u4ed6\u7684\u7c7b\u578b\uff0c\u5728\u91cd\u5199\u65f6\u4e0d\u8981\u5fd8\u6389@Override \u6ce8\u89e3\u3002<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"_5\u3001\u662f\u5426\u53ef\u4ee5\u7ee7\u627f-string\"><a href=\"#_5\u3001\u662f\u5426\u53ef\u4ee5\u7ee7\u627f-string\">5\u3001\u662f\u5426\u53ef\u4ee5\u7ee7\u627f String<\/a><\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u4e0d\u53ef\u4ee5\u3002String\u7c7b\u662ffinal\u7c7b\uff0c\u4e0d\u53ef\u4ee5\u7ee7\u627f\u3002<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"_6\u3001\u5f53\u4e00\u4e2a\u5bf9\u8c61\u88ab\u5f53\u4f5c\u53c2\u6570\u4f20\u9012\u5230\u4e00\u4e2a\u65b9\u6cd5\u540e-\u6b64\u65b9\u6cd5\u53ef\u6539\u53d8\u8fd9\u4e2a\u5bf9\u8c61\u7684\u5c5e\u6027-\u5e76\u53ef\u8fd4\u56de\u53d8\u5316\u540e\u7684\u7ed3\u679c-\u90a3\u4e48\u8fd9\u91cc\u5230\u5e95\u662f\u503c\u4f20\u9012\u8fd8\u662f\u5f15\u7528\u4f20\u9012\"><a href=\"#_6\u3001\u5f53\u4e00\u4e2a\u5bf9\u8c61\u88ab\u5f53\u4f5c\u53c2\u6570\u4f20\u9012\u5230\u4e00\u4e2a\u65b9\u6cd5\u540e-\u6b64\u65b9\u6cd5\u53ef\u6539\u53d8\u8fd9\u4e2a\u5bf9\u8c61\u7684\u5c5e\u6027-\u5e76\u53ef\u8fd4\u56de\u53d8\u5316\u540e\u7684\u7ed3\u679c-\u90a3\u4e48\u8fd9\u91cc\u5230\u5e95\u662f\u503c\u4f20\u9012\u8fd8\u662f\u5f15\u7528\u4f20\u9012\">6\u3001\u5f53\u4e00\u4e2a\u5bf9\u8c61\u88ab\u5f53\u4f5c\u53c2\u6570\u4f20\u9012\u5230\u4e00\u4e2a\u65b9\u6cd5\u540e\uff0c\u6b64\u65b9\u6cd5\u53ef\u6539\u53d8\u8fd9\u4e2a\u5bf9\u8c61\u7684\u5c5e\u6027\uff0c\u5e76\u53ef\u8fd4\u56de\u53d8\u5316\u540e\u7684\u7ed3\u679c\uff0c\u90a3\u4e48\u8fd9\u91cc\u5230\u5e95\u662f\u503c\u4f20\u9012\u8fd8\u662f\u5f15\u7528\u4f20\u9012\uff1f<\/a><\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u662f\u503c\u4f20\u9012\u3002 <strong>Java \u8bed\u8a00\u7684\u65b9\u6cd5\u8c03\u7528\u53ea\u652f\u6301\u53c2\u6570\u7684\u503c\u4f20\u9012<\/strong>\u3002\u5f53\u4e00\u4e2a\u5bf9\u8c61\u5b9e\u4f8b\u4f5c\u4e3a\u4e00\u4e2a\u53c2\u6570\u88ab\u4f20\u9012\u5230\u65b9\u6cd5\u4e2d\u65f6\uff0c\u53c2\u6570\u7684\u503c\u5c31\u662f\u5bf9\u8be5\u5bf9\u8c61\u7684\u5f15\u7528\u3002\u5bf9\u8c61\u7684\u5c5e\u6027\u53ef\u4ee5\u5728\u88ab\u8c03\u7528\u8fc7\u7a0b\u4e2d\u88ab\u6539\u53d8\uff0c\u4f46\u5bf9\u5bf9\u8c61\u5f15\u7528\u7684\u6539\u53d8\u662f\u4e0d\u4f1a\u5f71\u54cd\u5230\u8c03\u7528\u8005\u7684\u3002 C++\u548c C# \u4e2d\u53ef\u4ee5\u901a\u8fc7\u4f20\u5f15\u7528\u6216\u4f20\u8f93\u51fa\u53c2\u6570\u6765\u6539\u53d8\u4f20\u5165\u7684\u53c2\u6570\u7684\u503c \u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8bf4\u660e\uff1a Java \u4e2d\u6ca1\u6709\u4f20\u5f15\u7528\u5b9e\u5728\u662f\u975e\u5e38\u7684\u4e0d\u65b9\u4fbf\uff0c\u8fd9\u4e00\u70b9\u5728 Java 8 \u4e2d\u4ecd\u7136\u6ca1\u6709\u5f97\u5230\u6539\u8fdb\uff0c\u6b63\u662f\u5982\u6b64\u5728 Java \u7f16\u5199\u7684\u4ee3\u7801\u4e2d\u624d\u4f1a\u51fa\u73b0\u5927\u91cf\u7684 Wrapper \u7c7b\uff08\u5c06\u9700\u8981\u901a\u8fc7\u65b9\u6cd5\u8c03\u7528\u4fee\u6539\u7684\u5f15\u7528\u7f6e\u4e8e\u4e00\u4e2a Wrapper \u7c7b\u4e2d\uff0c\u518d\u5c06 Wrapper \u5bf9\u8c61\u4f20\u5165\u65b9\u6cd5\uff09\uff0c\u8fd9\u6837\u7684\u505a\u6cd5\u53ea\u4f1a\u8ba9\u4ee3\u7801\u53d8\u5f97\u81c3\u80bf\uff0c\u5c24\u5176\u662f\u8ba9\u4ece C \u548c C++ \u8f6c\u578b\u4e3a Java \u7a0b\u5e8f\u5458\u7684\u5f00\u53d1\u8005\u65e0\u6cd5\u5bb9\u5fcd\u3002<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"_7\u3001\u91cd\u8f7d-overload-\u548c\u91cd\u5199-override-\u7684\u533a\u522b-\u91cd\u8f7d\u7684\u65b9\u6cd5\u80fd\u5426\u6839\u636e\u8fd4\u56de\u7c7b\u578b\u8fdb\u884c\u533a\u5206\"><a href=\"#_7\u3001\u91cd\u8f7d-overload-\u548c\u91cd\u5199-override-\u7684\u533a\u522b-\u91cd\u8f7d\u7684\u65b9\u6cd5\u80fd\u5426\u6839\u636e\u8fd4\u56de\u7c7b\u578b\u8fdb\u884c\u533a\u5206\">7\u3001\u91cd\u8f7d(overload)\u548c\u91cd\u5199(override)\u7684\u533a\u522b \u91cd\u8f7d\u7684\u65b9\u6cd5\u80fd\u5426\u6839\u636e\u8fd4\u56de\u7c7b\u578b\u8fdb\u884c\u533a\u5206\uff1f<\/a><\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u65b9\u6cd5\u7684\u91cd\u8f7d\u548c\u91cd\u5199\u90fd\u662f<strong>\u5b9e\u73b0\u591a\u6001<\/strong>\u7684\u65b9\u5f0f\uff0c\u533a\u522b\u5728\u4e8e\u524d\u8005\u5b9e\u73b0\u7684\u662f<strong>\u7f16\u8bd1\u65f6\u7684\u591a\u6001\u6027<\/strong>\uff0c\u800c\u540e\u8005\u5b9e\u73b0\u7684\u662f<strong>\u8fd0\u884c\u65f6\u7684\u591a\u6001\u6027<\/strong>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u91cd\u8f7d\u53d1\u751f\u5728\u4e00\u4e2a\u7c7b\u4e2d\uff0c\u540c\u540d\u7684\u65b9\u6cd5\u5982\u679c\u6709\u4e0d\u540c\u7684\u53c2\u6570\u5217\u8868\uff08\u53c2\u6570\u7c7b\u578b\u4e0d\u540c\u3001\u53c2\u6570\u4e2a\u6570\u4e0d\u540c\u6216\u8005\u4e8c\u8005\u90fd\u4e0d\u540c\uff09\u5219\u89c6\u4e3a\u91cd\u8f7d\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u91cd\u5199\u53d1\u751f\u5728\u5b50\u7c7b\u4e0e\u7236\u7c7b\u4e4b\u95f4\uff0c\u91cd\u5199\u8981\u6c42\u5b50\u7c7b\u88ab\u91cd\u5199\u65b9\u6cd5\u4e0e\u7236\u7c7b\u88ab\u91cd\u5199\u65b9\u6cd5\u6709\u76f8\u540c\u7684\u8fd4\u56de\u7c7b\u578b\uff0c\u6bd4\u7236\u7c7b\u88ab\u91cd\u5199\u65b9\u6cd5\u66f4\u597d\u8bbf\u95ee\uff0c\u4e0d\u80fd\u6bd4\u7236\u7c7b\u88ab\u91cd\u5199\u65b9\u6cd5\u58f0\u660e\u66f4\u591a\u7684\u5f02\u5e38\uff08\u91cc\u6c0f\u4ee3\u6362\u539f\u5219\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u91cd\u8f7d\u5bf9\u8fd4\u56de\u7c7b\u578b\u6ca1\u6709\u7279\u6b8a\u7684\u8981\u6c42\u3002<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u65b9\u6cd5\u91cd\u8f7d\u7684\u89c4\u5219<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u65b9\u6cd5\u540d\u4e00\u81f4\uff0c\u53c2\u6570\u5217\u8868\u4e2d\u53c2\u6570\u7684\u987a\u5e8f\uff0c\u7c7b\u578b\uff0c\u4e2a\u6570\u4e0d\u540c\u3002<\/li>\n\n\n\n<li>\u91cd\u8f7d\u4e0e\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u65e0\u5173\uff0c\u5b58\u5728\u4e8e\u7236\u7c7b\u548c\u5b50\u7c7b\uff0c \u540c\u7c7b\u4e2d\u3002<\/li>\n\n\n\n<li>\u53ef\u4ee5\u629b\u51fa\u4e0d\u540c\u7684\u5f02\u5e38\uff0c\u53ef\u4ee5\u6709\u4e0d\u540c\u4fee\u9970\u7b26\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u65b9\u6cd5\u91cd\u5199\u7684\u89c4\u5219<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u53c2\u6570\u5217\u8868\u5fc5\u987b\u5b8c\u5168\u4e0e\u88ab\u91cd\u5199\u65b9\u6cd5\u7684\u4e00\u81f4\uff0c\u8fd4\u56de\u7c7b\u578b\u5fc5\u987b\u5b8c\u5168\u4e0e\u88ab\u91cd\u5199\u65b9\u6cd5\u7684\u8fd4\u56de\u7c7b\u578b\u4e00\u81f4\u3002<\/li>\n\n\n\n<li>\u6784\u9020\u65b9\u6cd5\u4e0d\u80fd\u88ab\u91cd\u5199\uff0c\u58f0\u660e\u4e3a final \u7684\u65b9\u6cd5\u4e0d\u80fd\u88ab\u91cd\u5199\uff0c\u58f0\u660e\u4e3a static \u7684\u65b9\u6cd5\u4e0d\u80fd\u88ab\u91cd\u5199\uff0c\u4f46\u662f\u80fd\u591f\u88ab\u518d\u6b21\u58f0\u660e\u3002<\/li>\n\n\n\n<li>\u8bbf\u95ee\u6743\u9650\u4e0d\u80fd\u6bd4\u7236\u7c7b\u4e2d\u88ab\u91cd\u5199\u7684\u65b9\u6cd5\u7684\u8bbf\u95ee\u6743\u9650\u66f4\u4f4e\u3002<\/li>\n\n\n\n<li>\u91cd\u5199\u7684\u65b9\u6cd5\u80fd\u591f\u629b\u51fa\u4efb\u4f55\u975e\u5f3a\u5236\u5f02\u5e38\uff08 UncheckedException \uff0c\u4e5f\u53eb\u975e\u8fd0\u884c\u65f6\u5f02\u5e38\uff09\uff0c\u65e0\u8bba\u88ab\u91cd\u5199\u7684\u65b9\u6cd5\u662f\u5426\u629b\u51fa\u5f02\u5e38\u3002\u4f46\u662f\uff0c\u91cd\u5199\u7684\u65b9\u6cd5\u4e0d\u80fd\u629b\u51fa\u65b0\u7684\u5f3a\u5236\u6027\u5f02\u5e38\uff0c\u6216\u8005\u6bd4\u88ab\u91cd\u5199\u65b9\u6cd5\u58f0\u660e\u7684\u66f4\u5e7f\u6cdb\u7684\u5f3a\u5236\u6027\u5f02 \u5e38\uff0c\u53cd\u4e4b\u5219\u53ef\u4ee5\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"_8\u3001\u4e3a\u4ec0\u4e48\u51fd\u6570\u4e0d\u80fd\u6839\u636e\u8fd4\u56de\u7c7b\u578b\u6765\u533a\u5206\u91cd\u8f7d\"><a href=\"#_8\u3001\u4e3a\u4ec0\u4e48\u51fd\u6570\u4e0d\u80fd\u6839\u636e\u8fd4\u56de\u7c7b\u578b\u6765\u533a\u5206\u91cd\u8f7d\">8\u3001\u4e3a\u4ec0\u4e48\u51fd\u6570\u4e0d\u80fd\u6839\u636e\u8fd4\u56de\u7c7b\u578b\u6765\u533a\u5206\u91cd\u8f7d\uff1f<\/a><\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u56e0\u4e3a\u8c03\u7528\u65f6\u4e0d\u80fd\u6307\u5b9a\u7c7b\u578b\u4fe1\u606f\uff0c\u7f16\u8bd1\u5668\u4e0d\u77e5\u9053\u4f60\u8981\u8c03\u7528\u54ea\u4e2a\u51fd\u6570\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>float findMin(int a,int b);\nint findMin(int a,int b);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u8c03\u7528 max(1, 2); \u65f6\u65e0\u6cd5\u786e\u5b9a\u8c03\u7528\u7684\u662f\u54ea\u4e2a\uff0c\u5355\u4ece\u8fd9\u4e00\u70b9\u4e0a\u6765\u8bf4\uff0c\u4ec5\u8fd4\u56de\u503c\u7c7b\u578b\u4e0d\u540c\u7684\u91cd\u8f7d\u662f\u4e0d\u5e94\u8be5\u5141\u8bb8\u7684\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u51fd\u6570\u7684\u8fd4\u56de\u503c\u53ea\u662f\u4f5c\u4e3a\u51fd\u6570\u8fd0\u884c\u4e4b\u540e\u7684\u4e00\u4e2a\u201c\u72b6\u6001\u201d\uff0c\u4ed6\u662f\u4fdd\u6301\u65b9\u6cd5\u7684\u8c03\u7528\u8005\u4e0e\u88ab\u8c03\u7528\u8005\u8fdb\u884c\u901a\u4fe1\u7684\u5173\u952e\u3002\u5e76\u4e0d\u80fd\u4f5c\u4e3a\u67d0\u4e2a\u65b9\u6cd5\u7684\u201c\u6807\u8bc6\u201d\u3002<\/strong><\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"_9\u3001char-\u578b\u53d8\u91cf\u4e2d\u80fd\u4e0d\u80fd\u5b58\u50a8\u4e00\u4e2a\u4e2d\u6587\u6c49\u5b57-\u4e3a\u4ec0\u4e48\"><a href=\"#_9\u3001char-\u578b\u53d8\u91cf\u4e2d\u80fd\u4e0d\u80fd\u5b58\u50a8\u4e00\u4e2a\u4e2d\u6587\u6c49\u5b57-\u4e3a\u4ec0\u4e48\">9\u3001char \u578b\u53d8\u91cf\u4e2d\u80fd\u4e0d\u80fd\u5b58\u50a8\u4e00\u4e2a\u4e2d\u6587\u6c49\u5b57\uff0c\u4e3a\u4ec0\u4e48\uff1f<\/a><\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">char \u7c7b\u578b\u53ef\u4ee5\u5b58\u50a8\u4e00\u4e2a\u4e2d\u6587\u6c49\u5b57\uff0c\u56e0\u4e3a Java \u4e2d\u4f7f\u7528\u7684\u7f16\u7801\u662f Unicode \uff08\u4e0d\u9009\u62e9\u4efb\u4f55\u7279\u5b9a\u7684\u7f16\u7801\uff0c\u76f4\u63a5\u4f7f\u7528\u5b57\u7b26\u5728\u5b57\u7b26\u96c6\u4e2d\u7684\u7f16\u53f7\uff0c\u8fd9\u662f\u7edf\u4e00\u7684\u552f\u4e00\u65b9\u6cd5\uff09\uff0c\u4e00\u4e2a char \u7c7b\u578b\u5360 2 \u4e2a\u5b57\u8282\uff08 16 \u6bd4\u7279\uff09\uff0c\u6240\u4ee5\u653e\u4e00\u4e2a\u4e2d\u6587\u662f\u6ca1\u95ee\u9898\u7684\u3002<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u8865\u5145<\/strong>\uff1a\u4f7f\u7528 Unicode \u610f\u5473\u7740\u5b57\u7b26\u5728 JVM \u5185\u90e8\u548c\u5916\u90e8\u6709\u4e0d\u540c\u7684\u8868\u73b0\u5f62\u5f0f\uff0c\u5728 JVM \u5185\u90e8\u90fd\u662f Unicode \uff0c\u5f53\u8fd9\u4e2a\u5b57\u7b26\u88ab\u4ece JVM \u5185\u90e8\u8f6c\u79fb\u5230\u5916\u90e8\u65f6\uff08\u4f8b\u5982\u5b58\u5165\u6587\u4ef6\u7cfb\u7edf\u4e2d\uff09\uff0c\u9700\u8981\u8fdb\u884c\u7f16\u7801\u8f6c\u6362\u3002\u6240\u4ee5 Java \u4e2d\u6709\u5b57\u8282\u6d41\u548c\u5b57\u7b26\u6d41\uff0c\u4ee5\u53ca\u5728\u5b57\u7b26\u6d41\u548c\u5b57\u8282\u6d41\u4e4b\u95f4\u8fdb\u884c\u8f6c\u6362\u7684\u8f6c\u6362\u6d41\uff0c\u5982 InputStreamReader \u548c OutputStreamReader \uff0c\u8fd9\u4e24\u4e2a\u7c7b\u662f\u5b57\u8282\u6d41\u548c\u5b57\u7b26\u6d41\u4e4b\u95f4\u7684\u9002\u914d\u5668\u7c7b\uff0c\u627f\u62c5\u4e86\u7f16\u7801\u8f6c\u6362\u7684\u4efb\u52a1\uff1b<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"_10\u3001\u62bd\u8c61\u7c7b-abstract-\u548c\u63a5\u53e3-interface-\u6709\u4ec0\u4e48\u5f02\u540c\"><a href=\"#_10\u3001\u62bd\u8c61\u7c7b-abstract-\u548c\u63a5\u53e3-interface-\u6709\u4ec0\u4e48\u5f02\u540c\">10\u3001\u62bd\u8c61\u7c7b(abstract)\u548c\u63a5\u53e3(interface) \u6709\u4ec0\u4e48\u5f02\u540c\uff1f<\/a><\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><\/th><th>\u62bd\u8c61\u7c7b<\/th><th>\u63a5\u53e3<\/th><\/tr><\/thead><tbody><tr><td>\u4e0d\u540c\u70b9<\/td><td>1.\u62bd\u8c61\u7c7b\u4e2d\u53ef\u4ee5\u5b9a\u4e49\u6784\u9020\u5668<br>2.\u53ef\u4ee5\u6709\u62bd\u8c61\u65b9\u6cd5\u548c\u5177\u4f53\u65b9\u6cd5<br>3.\u63a5\u53e3\u4e2d\u7684\u6210\u5458\u5168\u90fd\u662f public \u7684<br>4.\u62bd\u8c61\u7c7b\u4e2d\u53ef\u4ee5\u5b9a\u4e49\u6210\u5458\u53d8\u91cf<br>5.\u6709\u62bd\u8c61\u65b9\u6cd5\u7684\u7c7b\u5fc5\u987b\u88ab\u58f0\u660e\u4e3a\u62bd\u8c61\u7c7b\uff0c\u800c\u62bd\u8c61\u7c7b\u672a\u5fc5\u8981\u6709\u62bd\u8c61\u65b9\u6cd5<br>6.\u62bd\u8c61\u7c7b\u4e2d\u53ef\u4ee5\u5305\u542b\u9759\u6001\u65b9\u6cd5<br>7.\u4e00\u4e2a\u7c7b\u53ea\u80fd\u7ee7\u627f\u4e00\u4e2a\u62bd\u8c61\u7c7b<\/td><td>1.\u63a5\u53e3\u4e2d\u4e0d\u80fd\u5b9a\u4e49\u6784\u9020\u5668<br>2.\u65b9\u6cd5\u5168\u90e8\u90fd\u662f\u62bd\u8c61\u65b9\u6cd5<br>3.\u62bd\u8c61\u7c7b\u4e2d\u7684\u6210\u5458\u53ef\u4ee5\u662f private \u3001\u9ed8\u8ba4\u3001 protected \u3001 public<br>4.\u63a5\u53e3\u4e2d\u5b9a\u4e49\u7684\u6210\u5458\u53d8\u91cf\u5b9e\u9645\u4e0a\u90fd\u662f\u5e38\u91cf<br>5.\u63a5\u53e3\u4e2d\u4e0d\u80fd\u6709\u9759\u6001\u65b9\u6cd5<br>6.\u4e00\u4e2a\u7c7b\u53ef\u4ee5\u5b9e\u73b0\u591a\u4e2a\u63a5\u53e3<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u76f8\u540c\u70b9<\/strong>\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u4e0d\u80fd\u591f\u5b9e\u4f8b\u5316<\/li>\n\n\n\n<li>\u53ef\u4ee5\u5c06\u62bd\u8c61\u7c7b\u548c\u63a5\u53e3\u7c7b\u578b\u4f5c\u4e3a\u5f15\u7528\u7c7b\u578b<\/li>\n\n\n\n<li>\u4e00\u4e2a\u7c7b\u5982\u679c\u7ee7\u627f\u4e86\u67d0\u4e2a\u62bd\u8c61\u7c7b\u6216\u8005\u5b9e\u73b0\u4e86\u67d0\u4e2a\u63a5\u53e3\u90fd\u9700\u8981\u5bf9\u5176\u4e2d\u7684\u62bd\u8c61\u65b9\u6cd5\u5168\u90e8\u8fdb\u884c\u5b9e\u73b0\uff0c\u5426\u5219\u8be5\u7c7b\u4ecd\u7136\u9700\u8981\u88ab\u58f0\u660e\u4e3a\u62bd\u8c61\u7c7b<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"_11\u3001\u62bd\u8c61\u7684-abstract-\u65b9\u6cd5\u662f\u5426\u53ef\u540c\u65f6\u662f\u9759\u6001\u7684-static-\u662f\u5426\u53ef\u540c\u65f6\u662f\u672c\u5730\u65b9\u6cd5-native-\u662f\u5426\u53ef\u540c\u65f6\u88ab-synchronized\"><a href=\"#_11\u3001\u62bd\u8c61\u7684-abstract-\u65b9\u6cd5\u662f\u5426\u53ef\u540c\u65f6\u662f\u9759\u6001\u7684-static-\u662f\u5426\u53ef\u540c\u65f6\u662f\u672c\u5730\u65b9\u6cd5-native-\u662f\u5426\u53ef\u540c\u65f6\u88ab-synchronized\">11\u3001\u62bd\u8c61\u7684(abstract) \u65b9\u6cd5\u662f\u5426\u53ef\u540c\u65f6\u662f\u9759\u6001\u7684 (static)\uff0c \u662f\u5426\u53ef\u540c\u65f6\u662f\u672c\u5730\u65b9\u6cd5(native)\uff0c\u662f\u5426\u53ef\u540c\u65f6\u88ab synchronized?<\/a><\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u90fd\u4e0d\u80fd\u3002\u62bd\u8c61\u65b9\u6cd5\u9700\u8981\u5b50\u7c7b\u91cd\u5199\uff0c\u800c\u9759\u6001\u7684\u65b9\u6cd5\u662f\u65e0\u6cd5\u88ab\u91cd\u5199\u7684\uff0c\u56e0\u6b64\u4e8c\u8005\u662f\u77db\u76fe\u7684\u3002<code>synchronized<\/code>\u548c\u65b9\u6cd5\u7684\u5b9e\u73b0\u7ec6\u8282\u6709\u5173\uff0c\u62bd\u8c61\u65b9\u6cd5\u4e0d\u6d89\u53ca\u7ec6\u8282\uff0c\u56e0\u6b64\u4e5f\u662f\u4e92\u76f8\u77db\u76fe\u7684\u3002<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"_12\u3001\u9610\u8ff0\u9759\u6001\u53d8\u91cf\u548c\u5b9e\u4f8b\u53d8\u91cf\u7684\u533a\u522b\"><a href=\"#_12\u3001\u9610\u8ff0\u9759\u6001\u53d8\u91cf\u548c\u5b9e\u4f8b\u53d8\u91cf\u7684\u533a\u522b\">12\u3001\u9610\u8ff0\u9759\u6001\u53d8\u91cf\u548c\u5b9e\u4f8b\u53d8\u91cf\u7684\u533a\u522b\uff1f<\/a><\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>\u9759\u6001\u53d8\u91cf<\/strong>\uff1a\u662f\u88abstatic\u4fee\u9970\u7684\u53d8\u91cf\uff0c\u4e5f\u79f0\u4e3a\u7c7b\u53d8\u91cf\uff0c\u5b83\u5c5e\u4e8e\u7c7b\uff0c\u4e0d\u5c5e\u4e8e\u7c7b\u4e2d\u7684\u4efb\u4f55\u4e00\u4e2a\u5bf9\u8c61\uff0c\u4e00\u4e2a\u7c7b\u4e0d\u7ba1\u521b\u5efa\u591a\u5c11\u4e2a\u5bf9\u8c61\uff0c\u9759\u6001\u53d8\u91cf\u5728\u5185\u5b58\u4e2d\u6709\u4e14\u4ec5\u6709\u4e00\u4e2a\u62f7\u8d1d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u5b9e\u4f8b\u53d8\u91cf<\/strong>\uff1a\u5fc5\u987b\u4f9d\u5b58\u4e8e\u67d0\u4e00\u5b9e\u4f8b\uff0c\u9700\u8981\u5148\u521b\u5efa\u5bf9\u8c61\u7136\u540e\u901a\u8fc7\u5bf9\u8c61\u624d\u80fd\u8bbf\u95ee\u5230\u5b83\u3002\u9759\u6001\u53d8\u91cf\u53ef\u4ee5\u5b9e\u73b0\u8ba9\u591a\u4e2a\u5bf9\u8c61\u5171\u4eab\u5185\u5b58\u3002<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"_13\u3001-\u548c-equals-\u7684\u533a\u522b\"><a href=\"#_13\u3001-\u548c-equals-\u7684\u533a\u522b\">13\u3001<code>==<\/code> \u548c <code>equals<\/code> \u7684\u533a\u522b\uff1f<\/a><\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>equals\u4e0e == \u7684\u6700\u5927\u533a\u522b\uff1a\u4e00\u4e2a\u662f\u65b9\u6cd5\uff0c\u4e00\u4e2a\u662f\u8fd0\u7b97\u7b26<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>==<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5982\u679c\u6bd4\u8f83\u7684\u5bf9\u8c61\u662f\u57fa\u672c\u7c7b\u578b\uff0c\u5219\u6bd4\u8f83\u6570\u503c\u662f\u5426\u76f8\u7b49<\/li>\n\n\n\n<li>\u5982\u679c\u6bd4\u8f83\u7684\u5bf9\u8c61\u662f\u5c01\u88c5\u7c7b\u578b\uff0c\u5219\u6bd4\u8f83\u5bf9\u8c61\u7684\u5730\u5740\u503c\u662f\u5426\u76f8\u7b49<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>equals<\/strong>\uff1a\u7528\u6765\u6bd4\u8f83\u65b9\u6cd5\u4e24\u4e2a\u5bf9\u8c61\u7684\u5185\u5bb9\u662f\u5426\u76f8\u7b49<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6ce8<\/strong>\uff1aequals \u65b9\u6cd5\u4e0d\u80fd\u7528\u4e8e\u57fa\u672c\u6570\u636e\u7c7b\u578b\u7684\u53d8\u91cf\uff0c\u5982\u679c\u6ca1\u6709\u5bf9 equals \u65b9\u6cd5\u8fdb\u884c\u91cd\u5199\uff0c\u5219\u6bd4\u8f83\u7684\u662f\u5f15\u7528\u7c7b\u578b\u7684\u53d8\u91cf\u6240\u6307\u5411\u7684\u5bf9\u8c61\u7684\u5730\u5740\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>String a = \"a\";\nString b = \"a\";\n\/\/\u8fd9\u6837\u5b9a\u4e49\u7684a\u548cb\u6307\u5411\u7684\u662f\u5b57\u7b26\u4e32\u5e38\u91cf\u533a\u53d8\u91cf\uff0c\u5730\u5740\u662f\u4e00\u6837\u7684\uff0c\u5373\u7528equals\u4e3atrue\uff0c\u7528==\u4e5f\u4e3atrue\u3002\n\nString s1=new String(\"xyz\");      \/\/\u521b\u5efa\u4e86String\u7c7b\u578b\u7684\u5185\u5bb9\u4e3axyz\u7684s1\u5bf9\u8c61\nString s2=new String(\"xyz\");      \/\/\u521b\u5efa\u4e86String\u7c7b\u578b\u7684\u5185\u5bb9\u4e3axyz\u7684s2\u5bf9\u8c61\nBoolean b1=s1.equals(s2);      \/\/\u6bd4\u8f83s1\u5bf9\u8c61\u548cs2\u5bf9\u8c61\u7684\u5185\u5bb9\u76f8\u7b49\uff0c\u8fd4\u56detrue\u3002\nBoolean b2=(s1==s2); \/\/\u6bd4\u8f83s1\u548cs2\u4e24\u4e2a\u5bf9\u8c61\u7684\u5b58\u50a8\u5730\u5740\u662f\u5426\u76f8\u7b49\uff0c\u660e\u663e\u4e24\u8005\u5206\u522b\u5b58\u50a8\u5728\u4e0d\u540c\u7684\u5730\u5740\uff0c\u6240\u4ee5\u8fd4\u56de\uff1afalse<\/code><\/pre>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"_14\u3001break-\u548c-continue-\u7684\u533a\u522b\"><a href=\"#_14\u3001break-\u548c-continue-\u7684\u533a\u522b\">14\u3001break \u548c continue \u7684\u533a\u522b\uff1f<\/a><\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">break\u548c continue \u90fd\u662f\u7528\u6765\u63a7\u5236\u5faa\u73af\u7684 \u8bed\u53e5\u3002<br><strong>break<\/strong>\uff1a\u7528\u4e8e\u5b8c\u5168\u7ed3\u675f\u4e00\u4e2a\u5faa\u73af\uff0c\u8df3\u51fa\u5faa\u73af\u4f53\u6267\u884c\u5faa\u73af\u540e\u9762\u7684\u8bed\u53e5\u3002<br><strong>continue<\/strong>\uff1a\u7528\u4e8e\u8df3\u8fc7\u672c\u6b21\u5faa\u73af\uff0c\u6267\u884c\u4e0b\u6b21\u5faa\u73af\u3002<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"_15\u3001string-s-hello-s-s-world-\u8fd9\u4e24\u884c\u4ee3\u7801\u6267\u884c\u540e-\u539f\u59cb\u7684-string-\u5bf9\u8c61\u4e2d\u7684\u5185\u5bb9\u5230\u5e95\u53d8\u4e86\u6ca1\u6709\"><a href=\"#_15\u3001string-s-hello-s-s-world-\u8fd9\u4e24\u884c\u4ee3\u7801\u6267\u884c\u540e-\u539f\u59cb\u7684-string-\u5bf9\u8c61\u4e2d\u7684\u5185\u5bb9\u5230\u5e95\u53d8\u4e86\u6ca1\u6709\">15\u3001String s = &#8220;Hello&#8221;;s = s + &#8221; world!&#8221;; \u8fd9\u4e24\u884c\u4ee3\u7801\u6267\u884c\u540e\uff0c\u539f\u59cb\u7684 String \u5bf9\u8c61\u4e2d\u7684\u5185\u5bb9\u5230\u5e95\u53d8\u4e86\u6ca1\u6709\uff1f<\/a><\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u6ca1\u6709\u3002\u56e0\u4e3aString\u7c7b\u662f\u4e0d\u53ef\u53d8\u7c7b\uff0c\u5b83\u7684\u6240\u6709\u5bf9\u8c61\u90fd\u662f\u4e0d\u53ef\u53d8\u5bf9\u8c61\u3002\u5728\u8fd9\u6bb5\u4ee3\u7801\u4e2d\uff0c s \u539f\u5148\u6307\u5411\u4e00\u4e2a String \u5bf9\u8c61\uff0c\u5185\u5bb9\u662f&#8221;Hello&#8221;\uff0c\u7136\u540e\u6211\u4eec\u5bf9 s \u8fdb\u884c\u4e86\u201c \u64cd\u4f5c\uff0c\u90a3\u4e48 s \u6240\u6307\u5411\u7684\u90a3\u4e2a\u5bf9\u8c61\u662f\u5426\u53d1\u751f\u4e86\u6539\u53d8\u5462\uff1f\u7b54\u6848\u662f\u6ca1\u6709\u3002\u8fd9\u65f6\uff0c s \u4e0d\u6307\u5411\u539f\u6765\u90a3\u4e2a\u5bf9\u8c61\u4e86\uff0c\u800c\u6307\u5411\u4e86\u53e6\u4e00\u4e2a String \u5bf9\u8c61\uff0c\u5185\u5bb9\u4e3a &#8220;Hello world!&#8221;\uff0c\u539f\u6765\u90a3\u4e2a\u5bf9\u8c61\u8fd8\u662f\u5b58\u5728\u5185\u5b58\u4e2d\u3002\u53ea\u662fs\u8fd9\u4e2a\u5f15\u7528\u53d8\u91cf\u4e0d\u518d\u6307\u5411\u5b83\u4e86<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n","protected":false},"excerpt":{"rendered":"<p>1\u3001Java \u6709\u6ca1\u6709 goto \u8bed\u53e5\uff1f goto\u662f Java \u4e2d\u7684\u4fdd\u7559\u5b57\uff0c\u5728\u76ee\u524d\u7248\u672c\u7684 Java \u4e2d\u6ca1\u6709\u4f7f\u7528\u3002 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":234,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[103,104],"tags":[],"class_list":["post-1381","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java"],"_links":{"self":[{"href":"https:\/\/zero-zl.cn\/index.php\/wp-json\/wp\/v2\/posts\/1381","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/zero-zl.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zero-zl.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zero-zl.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zero-zl.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1381"}],"version-history":[{"count":2,"href":"https:\/\/zero-zl.cn\/index.php\/wp-json\/wp\/v2\/posts\/1381\/revisions"}],"predecessor-version":[{"id":1383,"href":"https:\/\/zero-zl.cn\/index.php\/wp-json\/wp\/v2\/posts\/1381\/revisions\/1383"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/zero-zl.cn\/index.php\/wp-json\/wp\/v2\/media\/234"}],"wp:attachment":[{"href":"https:\/\/zero-zl.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1381"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zero-zl.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1381"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zero-zl.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1381"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}