{"id":64202,"date":"2026-01-23T00:16:31","date_gmt":"2026-01-22T16:16:31","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/64202.html"},"modified":"2026-01-23T00:16:31","modified_gmt":"2026-01-22T16:16:31","slug":"java%e5%85%ab%e8%82%a1day01","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/64202.html","title":{"rendered":"Java\u516b\u80a1Day01"},"content":{"rendered":"

\u6211\u4f1a\u6bcf\u5929\u82b1\u4e24\u5c0f\u65f6\u6765\u80cc\u4e00\u4e9b\u5173\u4e8eJava\u7684\u516b\u80a1\u6587，\u5e94\u5bf9\u4ee5\u540e\u7684\u9762\u8bd5，\u8fd9\u91cc\u770b\u7684\u662f\u5c0f\u6797Coding<\/p>\n

Java\u7684\u7279\u70b9:<\/h2>\n

\u5e73\u53f0\u65e0\u5173\u6027:\u00a0Java\u4f1a\u628a\u6240\u6709\u7684\u6e90\u4ee3\u7801\u90fd\u7f16\u8bd1\u6210\u5b57\u8282\u7801\u6587\u4ef6，\u5728\u6240\u6709\u5b89\u88c5\u4e86Java\u865a\u62df\u673a(JVM)\u7684\u7cfb\u7edf\u4e0a\u90fd\u53ef\u4ee5\u8fd0\u884c<\/p>\n

\u9762\u5411\u5bf9\u8c61: Java\u662f\u4e25\u683c\u6309\u7167\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b(OOP)\u7684\u8bed\u8a00，\u51e0\u4e4e\u4e00\u5207\u90fd\u662f\u9762\u5411\u5bf9\u8c61，oop\u4f7f\u5f97\u4ee3\u7801\u66f4\u5bb9\u6613\u5f00\u53d1\u548c\u7ef4\u62a4，oop\u5305\u62ec\u7c7b\u3001\u5bf9\u8c61\u3001\u62bd\u8c61\u3001\u5c01\u88c5\u3001\u7ee7\u627f\u3001\u591a\u6001；<\/p>\n

\u5185\u5b58\u7ba1\u7406: Java\u6709\u81ea\u5df1\u7684\u5185\u5b58\u56de\u6536\u673a\u5236，Java\u4f1a\u81ea\u52a8\u56de\u6536\u4e0d\u7528\u7684\u5bf9\u8c61，\u907f\u514d\u5185\u5b58\u6cc4\u6f0f\u548c\u4e00\u4e9b\u5176\u4ed6\u7684\u5185\u5b58\u76f8\u5173\u7684\u95ee\u9898<\/p>\n

Java\u7684\u4f18\u52bf\u548c\u52a3\u52bf<\/h2>\n

\u4f18\u52bf<\/h3>\n

1.\u8de8\u5e73\u53f0: \u53ea\u8981\u6709JVM\u5c31\u53ef\u4ee5\u5728\u4efb\u4f55\u5730\u65b9\u8fd0\u884c<\/p>\n

2.\u9762\u5411\u5bf9\u8c61: \u8ba9\u4ee3\u7801\u5bb9\u6613\u5f00\u53d1\u548c\u7ef4\u62a4<\/p>\n

3.\u5185\u5b58\u7ba1\u7406：\u6709\u81ea\u5e26\u7684\u5185\u5b58\u56de\u6536\u673a\u5236，\u907f\u514d\u5185\u5b58\u6cc4\u6f0f\u548c\u5185\u5b58\u76f8\u5173\u95ee\u9898<\/p>\n

4.\u5f3a\u5927\u7684\u751f\u6001\u7cfb\u7edf: \u6bd4\u5982\u6709Spring\u6846\u67b6，\u5404\u79cd\u5e93\u548c\u5de5\u5177，\u5e94\u7528\u5e7f\u6cdb<\/p>\n

5. \u9ad8\u5e76\u53d1\u652f\u6301：\u6709\u591a\u7ebf\u7a0b\u3001\u5e76\u53d1\u5de5\u5177\u5305(java.util.concurrent)\u4e5f\u5c31\u662fJUC\u7684\u652f\u6301，\u80fd\u591f\u5e94\u4ed8\u9ad8\u5e76\u53d1\u7684\u540e\u7aef\u670d\u52a1(\u5982\u79d2\u6740\u7cfb\u7edf\u3001\u7535\u5546\u8ba2\u5355\u7cfb\u7edf)<\/p>\n

6.\u5b89\u5168\u6027\u548c\u7a33\u5b9a\u6027: \u6709Java\u5b89\u5168\u6a21\u578b\u6bd4\u5982\u6c99\u7bb1\u673a\u5236，\u9002\u5408\u7f51\u7edc\u73af\u5883，\u4f01\u4e1a\u957f\u671f\u4f7f\u7528，\u7248\u672c\u66f4\u65b0\u4e5f\u91cd\u89c6\u903b\u8f91\u517c\u5bb9\u00a0<\/p>\n

\u52a3\u52bf<\/h3>\n

1.\u6027\u80fd\u65b9\u9762：\u867d\u7136JVM\u505a\u4e86\u5f88\u591a\u4f18\u5316，\u4f46\u5bf9\u6bd4C++\u548cRust\u8fd9\u79cd\u521a\u7f16\u8bd1\u7684\u8bed\u8a00，\u5f00\u9500\u8fd8\u662f\u6bd4\u8f83\u5927，\u5c24\u5176\u662f\u542f\u52a8\u670d\u52a1\u7684\u65f6\u95f4\u6bd4\u8f83\u957f<\/p>\n

2.\u8bed\u6cd5\u7e41\u7410：\u6837\u677f\u4ee3\u7801\u591a，\u6709\u4e86lambda\u8868\u8fbe\u5f0f\u540e\u4f1a\u597d\u4e00\u4e9b，\u5bf9\u4e8ePython\u6765\u8bf4\u5c31\u4e0d\u591f\u7b80\u6d01，\u5bf9\u4e8e\u5bf9\u8c61\u6bd4\u8f83\u4e25\u683c，\u5728\u7f16\u5199\u4e00\u4e9b\u7b80\u5355\u7684\u7a0b\u5e8f\u65f6\u8017\u8d39\u7684\u65f6\u95f4\u5c31\u6bd4\u8f83\u591a<\/p>\n

3.\u5185\u5b58\u6d88\u8017：JVM\u672c\u8eab\u5360\u5185\u5b58，\u5bf9\u4e8e\u6709\u9650\u8d44\u6e90\u7684\u73af\u5883\u6765\u8bf4\u4e0d\u592a\u53cb\u597d<\/p>\n

4.\u5f00\u53d1\u6548\u7387：\u5bf9\u6bd4\u52a8\u6001\u8bed\u8a00Python\u6765\u8bf4，\u7f16\u8bd1\u8fc7\u7a0b\u4e5f\u53ef\u80fd\u62d6\u6162\u5f00\u53d1\u901f\u5ea6<\/p>\n

Java\u4e3a\u4ec0\u4e48\u662f\u8de8\u5e73\u53f0\u7684<\/h2>\n

\u4f9d\u8d56\u4e8eJVM，JVM\u662f\u4e00\u4e2a\u8f6f\u4ef6\u7531C\/C++\u5f00\u53d1，\u5728\u4e0d\u540c\u5e73\u53f0\u4e0b\u7f16\u8bd1\u51fa\u6765\u7684\u5b57\u8282\u7801\u6587\u4ef6(.class)\u5728\u4e0d\u540c\u5e73\u53f0\u7248\u672c\u7684JVM\u7ffb\u8bd1\u6210\u5bf9\u5e94\u5e73\u53f0\u7684\u673a\u5668\u7801，\u5b9e\u73b0\u4e86\u8de8\u5e73\u53f0，\u7f16\u8bd1\u540e\u7684\u673a\u5668\u7801\u4e0d\u80fd\u8de8\u5e73\u53f0<\/p>\n

\"\"<\/p>\n

JVM\u3001JDK\u3001JRE\u4e09\u8005\u5173\u7cfb？<\/span><\/h2>\n

\"\"<\/p>\n

JVM: \u662fJava\u7a0b\u5e8f\u7684\u8fd0\u884c\u73af\u5883，\u8d1f\u8d23\u7f16\u8bd1\u5b57\u8282\u7801\u6587\u4ef6，\u63d0\u4f9b\u5185\u5b58\u7ba1\u7406\u3001\u5783\u573e\u56de\u6536\u3001\u5b89\u5168\u6027\u7b49\u529f\u80fd，\u5e76\u4e14\u4f7fJava\u5177\u6709\u8de8\u5e73\u53f0\u6027<\/p>\n

JRE：\u662fJava\u8fd0\u884c\u65f6\u73af\u5883，\u662fJava\u6240\u9700\u8fd0\u884c\u7684\u6700\u5c0f\u73af\u5883，\u5305\u542bJVM\u548c\u4e00\u7ec4\u8fd0\u884c\u7c7b\u5e93，\u7528\u4e8e\u652f\u6301Java\u7a0b\u5e8f\u7684\u6267\u884c\u3002JRE\u4e0d\u5305\u542b\u5f00\u53d1\u5de5\u5177，\u53ea\u63d0\u4f9bJava\u7a0b\u5e8f\u8fd0\u884c\u6240\u9700\u7684\u8fd0\u884c\u73af\u5883\u00a0<\/p>\n

JDK: \u5305\u542b\u4e86Java\u8fd0\u884c\u7684\u6240\u6709\u5de5\u5177\u548c\u5e93，\u8c03\u8bd5\u5668（jdb），\u7f16\u8bd1\u5668（javac），JVM\u7b49\u6240\u6709\u5f00\u53d1\u5de5\u5177，JDK\u63d0\u4f9b\u4e86\u5f00\u53d1\u3001\u7f16\u8bd1\u3001\u8c03\u8bd5\u548c\u8fd0\u884cJava\u7a0b\u5e8f\u6240\u9700\u7684\u5168\u90e8\u5de5\u5177\u548c\u73af\u5883\u3002<\/p>\n

\u6240\u4ee5JDK\u5927\u4e8eJRE\u5927\u4e8eJVM<\/p>\n

\nJVM\u548cJava\u6709\u4ec0\u4e48\u533a\u522b？<\/span><\/h2>\n

JVM\u662f\u8fd0\u884c\u73af\u5883，Java\u662f\u7f16\u7a0b\u8bed\u8a00<\/p>\n

\u4e8c\u8005\u76f8\u4e92\u914d\u5408，Java\u901a\u8fc7\u7f16\u8bd1\u5668\u7f16\u8bd1\u6210\u5b57\u8282\u7801\u6587\u4ef6，\u518d\u7531JVM\u628a\u5b57\u8282\u7801\u7ffb\u8bd1\u6210\u4e0d\u540c\u5e73\u53f0\u7684\u673a\u5668\u7801\u6587\u4ef6，\u5728\u4e0d\u540c\u5e73\u53f0\u8fd0\u884c\u5b9e\u73b0\u8de8\u5e73\u53f0\u6027<\/p>\n

JVM\u8fd8\u53ef\u4ee5\u7f16\u8bd1Kotlin\u3001Scala\u8fd9\u7c7b\u8bed\u8a00\u7f16\u8bd1\u751f\u6210\u540e\u7684Java\u5b57\u8282\u7801\u6587\u4ef6，\u6240\u4ee5JVM\u4e0d\u4ec5\u662f\u8dd1Java\u7684\u5e73\u53f0，\u66f4\u662f\u6574\u4e2aJVM\u8bed\u8a00\u751f\u6001\u7684\u57fa\u7840\u5e73\u53f0<\/p>\n

JVM\u662f\u4ec0\u4e48<\/h2>\n

JVM\u662fJava\u865a\u62df\u673a，\u8d1f\u8d23\u89e3\u91ca\u81ea\u5df1\u7684\u6307\u4ee4\u96c6(\u5b57\u8282\u7801)\u5e76\u6620\u5c04\u5230\u672c\u5730\u7684CPU\u6307\u4ee4\u96c6\u548cOS\u7684\u7cfb\u7edf\u8c03\u7528<\/p>\n

\u7f16\u8bd1\u578b\u8bed\u8a00\u548c\u89e3\u91ca\u578b\u8bed\u8a00\u7684\u533a\u522b<\/h2>\n

\u7f16\u8bd1\u578b\u8bed\u8a00：\u5728\u6574\u4e2a\u7a0b\u5e8f\u6267\u884c\u65f6，\u4f1a\u88ab\u7f16\u8bd1\u6210\u5b57\u8282\u7801\u6587\u4ef6\u6216\u6210\u673a\u5668\u7801，\u751f\u6210\u6267\u884c\u6587\u4ef6，\u901f\u5ea6\u5feb，\u8de8\u5e73\u53f0\u6027\u5dee，\u6bd4\u5982C\/C++<\/p>\n

\u89e3\u91ca\u578b\u8bed\u8a00：\u5728\u7f16\u8bd1\u65f6\u9010\u884c\u89e3\u91ca\u6e90\u4ee3\u7801，\u4e0d\u751f\u6210\u6267\u884c\u6587\u4ef6，\u4f46\u901f\u5ea6\u6162，\u8de8\u5e73\u53f0\u6027\u5dee\u6bd4\u5982Python\/JavaScript<\/p>\n

Java \u65e2\u662f\u7f16\u8bd1\u578b\u8bed\u8a00，\u4e5f\u662f\u89e3\u91ca\u578b\u8bed\u8a00\u3002\u5b83\u662f\u4e00\u79cd\u6df7\u5408\u578b\u8bed\u8a00\u3002\u7f16\u8bd1\u6210\u5b57\u8282\u7801\u4f53\u73b0\u7f16\u8bd1\u578b\u8bed\u8a00\u3001JVM\u89e3\u91ca\u5b57\u8282\u7801\u4f53\u73b0\u89e3\u91ca\u578b\u8bed\u8a00\u3001\u8de8\u5e73\u53f0\u6027\u597d<\/p>\n

Python\u548cJava\u7684\u533a\u522b<\/h2>\n

python\u662f\u89e3\u91ca\u578b\u8bed\u8a00，\u7ffb\u8bd1\u7684\u540c\u65f6\u4f1a\u6267\u884c\u7a0b\u5e8f<\/p>\n

Java\u662f\u5df2\u7f16\u8bd1\u7684\u7f16\u8bd1\u8bed\u8a00，java\u7f16\u8bd1\u5668\u4f1a\u628a\u7a0b\u5e8f\u7f16\u8bd1\u6210\u5b57\u8282\u7801\u6587\u4ef6，\u518d\u7531JVM\u6267\u884c\u7ffb\u8bd1\u6210\u673a\u5668\u7801\u00a0 \u00a0<\/p>\n

\u4ef7\u503c\u4ea4\u4ed8\u548c\u5f15\u7528\u4ea4\u4ed8\u7684\u533a\u522b\u00a0 \u00a0<\/h2>\n

\u6240\u6709\u7684\u53c2\u6570\u4f20\u9012\u90fd\u662f\u503c\u4f20\u9012，\u4e0d\u5b58\u5728\u771f\u6b63\u7684"\u5f15\u7528\u4f20\u9012"\u00a0<\/p>\n

\u5bf9\u4e8e\u57fa\u7840\u7c7b\u578b\u5982int \u82e5\u53ea\u4fee\u6539\u526f\u672c\u7684\u503c\u4e0d\u4f1a\u5f71\u54cd\u672c\u8eab\u7684\u503c<\/p>\n

\"\"<\/p>\n

\u5bf9\u4e8e\u5f15\u7528\u7c7b\u578b，\u82e5\u53ea\u4fee\u6539\u526f\u672c\u7684\u503c\u4f1a\u5f71\u54cd\u672c\u8eab\u7684\u503c\u56e0\u4e3a\u6b64\u65f6\u526f\u672c\u548c\u539f\u5f15\u7528\u6307\u5411\u540c\u4e00\u4e2a\u5bf9\u8c61，\u4f46\u662f\u526f\u672c\u4fee\u6539\u7684\u503c\u6307\u5411\u65b0\u7684\u526f\u672c，\u5c31\u4e0d\u4f1a\u4fee\u6539\u539f\u672c\u7684\u503c，\u56e0\u4e3a\u6b64\u65f6\u526f\u672c\u6307\u5411\u4e86\u65b0\u7684\u5bf9\u8c61<\/p>\n

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