{"rsdb":{"rid":"126644","subhead":"","postdate":"0","aid":"95449","fid":"81","uid":"1","topic":"1","content":"<p align=\"center\"><strong>\u516b\uff1a\u521d\u8bc6Java\u7a0b\u5e8f\u2015\u2015HelloWorld<\/strong> <\/p><br\/><p>\u3000\u3000 \u8c61\u5176\u5b83\u7f16\u7a0b\u8bed\u8a00\u4e00\u6837\uff0cJava \u7f16\u7a0b\u8bed\u8a00\u4e5f\u88ab\u7528\u6765\u521b\u5efa\u5e94\u7528\u7a0b\u5e8f\u3002\u4e00\u4e2a\u5171\u540c\u7684\u5e94\u7528\u7a0b\u5e8f\u8303\u4f8b\u662f\u5728\u5c4f\u5e55\u4e0a\u663e\u793a\u5b57\u4e32\u201cHello World!\u201d \u3002\u4e0b\u5217\u4ee3\u7801\u7ed9\u51fa\u4e86\u8fd9\u4e2a Java \u5e94\u7528\u7a0b\u5e8f\u3002 <\/p><br\/><p>\u3000\u3000 \u867d\u7136\u5f88\u591a\u4f60\u53ef\u80fd\u90fd\u4e0d\u660e\u767d\uff0c\u6ca1\u6709\u5173\u7cfb\uff0c\u4e3b\u8981\u662f\u6765\u4f53\u4f1a\u4e00\u4e0b Java \u7a0b\u5e8f\u662f\u4ec0\u4e48\u6837\u5b50\uff0c\u4f60\u53ef\u4ee5\u5148\u770b\u770b\uff0c\u6709\u4e2a\u5370\u8c61\uff0c\u7136\u540e\u53ef\u4ee5\u5148\u6a21\u4eff\u7740\u505a\u3002 <\/p><br\/><p>\u3000\u30001 \uff1aHelloWorldApp <\/p><br\/><p>\u3000\u3000 1.\/\/ <\/p><br\/><p>\u3000\u3000 2.\/\/ HelloWorld \u5e94\u7528\u793a\u4f8b <\/p><br\/><p>\u3000\u3000 3.\/\/ <\/p><br\/><p>\u3000\u3000 4.public class HelloWorldApp{ <\/p><br\/><p>\u3000\u3000 5. public static void main (String args[]) { <\/p><br\/><p>\u3000\u3000 6. System.out.println (\"Hello World!\"); <\/p><br\/><p>\u3000\u3000 7. } <\/p><br\/><p>\u3000\u3000 8.} <\/p><br\/><p>\u3000\u3000\u4ee5\u4e0a\u7a0b\u5e8f\u884c\u662f\u5728\u4f60\u7684\u5c4f\u5e55\u4e0a\u6253\u5370\u201cHello World!\u201d\u6240\u9700\u7684\u6700\u5c11\u4ee3\u7801\u3002<\/p><br\/><p>\u3000\u30002\uff1a\u63cf\u8ff0 HelloWorldApp <\/p><br\/><p>\u3000\u3000 \u7b2c 1-3 \u884c <\/p><br\/><p>\u3000\u3000 \u7a0b\u5e8f\u4e2d\u7684 1-3 \u884c\u662f\u6ce8\u91ca\u884c <\/p><br\/><p>\u3000\u3000 1 \/\/ <\/p><br\/><p>\u3000\u3000 2 \/\/ HelloWorld \u5e94\u7528\u793a\u4f8b <\/p><br\/><p>\u3000\u3000 3 \/\/ <\/p><br\/><p>\u3000\u3000 \u7b2c 4 \u884c <\/p><br\/><p>\u3000\u3000 \u7b2c 4 \u884c\u58f0\u660e\u7c7b\u540d\u4e3a HelloWorldApp\u3002\u7c7b\u540d\uff08Classname\uff09\u662f\u5728\u6e90\u6587\u4ef6\u4e2d\u6307\u660e\u7684\uff0c\u5b83\u53ef\u5728\u4e0e\u6e90\u4ee3\u7801\u76f8\u540c\u7684\u76ee\u5f55\u4e0a\u521b\u5efa\u4e00\u4e2a classname \u00b7 class \u6587\u4ef6\u3002\u5728\u672c\u4f8b\u9898\u4e2d\uff0c\u7f16\u8bd1\u5668\u521b\u5efa\u4e86\u4e00\u4e2a\u79f0\u4e3aHelloWorldApp.class\u7684\u6587\u4ef6, \u5b83\u5305\u542b\u4e86\u516c\u5171\u7c7bHelloWorldApp\u7684\u7f16\u8bd1\u4ee3\u7801\u3002 <\/p><br\/><p>\u3000\u3000 4 public class HelloWorldApp\uff5b <\/p><br\/><p>\u3000\u3000 \u7b2c 5 \u884c <\/p><br\/><p>\u3000\u3000 \u7b2c 5 \u884c\u662f\u7a0b\u5e8f\u6267\u884c\u7684\u8d77\u59cb\u70b9\u3002Java \u89e3\u91ca\u5668\u5fc5\u987b\u53d1\u73b0\u8fd9\u4e00\u4e25\u683c\u5b9a\u4e49\u7684\u70b9\uff0c\u5426\u5219\u5c06\u62d2\u7edd\u8fd0\u884c\u7a0b\u5e8f\u3002 <\/p><br\/><p>\u3000\u3000 \u5176\u5b83\u7a0b\u5e8f\u8bed\u8a00\uff08\u7279\u522b\u662f C \u548c <a href=https:\/\/www.cppentry.com\/list.php?fid=49 style=text-decoration:underline;font-size:14px;color:#F70968; target=_blank>C++<\/a>\uff09\u4e5f\u91c7\u7528 main ()\u58f0\u660e\u4f5c\u4e3a\u7a0b\u5e8f\u6267\u884c\u7684\u8d77\u59cb\u70b9\u3002\u6b64\u58f0\u660e\u7684\u4e0d\u540c\u90e8\u5206\u5c06\u5728\u672c\u8bfe\u7a0b\u7684\u540e\u51e0\u90e8\u5206\u4ecb\u7ecd\u3002 <\/p><br\/><p>\u3000\u3000 \u5982\u679c\u5728\u7a0b\u5e8f\u7684\u547d\u4ee4\u884c\u4e2d\u7ed9\u51fa\u4e86\u4efb\u4f55\u81ea\u53d8\u91cf\uff08\u547d\u4ee4\u884c\u53c2\u6570\uff09 \uff0c\u5b83\u4eec\u5c06\u88ab\u4f20\u9012\u7ed9 main()\u65b9\u6cd5\u4e2d\u88ab\u79f0\u4f5c args \u7684 String \u6570\u7ec4\u3002\u5728\u672c\u4f8b\u9898\u4e2d\uff0c\u672a\u4f7f\u7528\u81ea\u53d8\u91cf\u3002 <\/p><br\/><p>\u3000\u3000 public static void main (String args[]) \uff5b <\/p><br\/><p>\u3000\u3000 public\uff0d\u65b9\u6cd5 main()\u53ef\u88ab\u4efb\u4f55\u7a0b\u5e8f\u8bbf\u95ee\uff0c\u5305\u62ec Java \u89e3\u91ca\u5668\u3002 <\/p><br\/><p>\u3000\u3000 static\uff0d \u662f\u4e00\u4e2a\u544a\u77e5\u7f16\u8bd1\u5668 main()\u662f\u7528\u4e8e\u7c7b HelloWorldApp \u4e2d\u7684\u65b9\u6cd5\u7684\u5173\u952e\u5b57\u3002 <\/p><br\/><p>\u3000\u3000 \u4e3a\u4f7f main()\u5728\u7a0b\u5e8f\u505a\u5176\u5b83\u4e8b\u4e4b\u524d\u5c31\u5f00\u59cb\u8fd0\u884c\uff0c\u8fd9\u4e00\u5173\u952e\u5b57\u662f\u5fc5\u8981\u7684\u3002 <\/p><br\/><p>\u3000\u3000 void\uff0d \u8868\u660e main()\u4e0d\u8fd4\u56de\u4efb\u4f55\u4fe1\u606f\u3002\u8fd9\u4e00\u70b9\u662f\u91cd\u8981\u7684\uff0c\u56e0\u4e3a Java \u7f16\u7a0b\u8bed\u8a00\u8981\u8fdb\u884c\u8c28\u614e\u7684\u7c7b\u578b\u68c0\u67e5\uff0c\u5305\u62ec\u68c0\u67e5\u8c03\u7528\u7684\u65b9\u6cd5\u786e\u5b9e\u8fd4\u56de\u4e86\u8fd9\u4e9b\u65b9\u6cd5\u6240\u58f0\u660e\u7684\u7c7b\u578b\u3002 <\/p><br\/><p>\u3000\u3000 String args[] \uff0d \u662f\u4e00\u4e2a String \u6570\u7ec4\u7684\u58f0\u660e\uff0c \u5b83\u5c06\u5305\u542b\u4f4d\u4e8e\u7c7b\u540d\u4e4b\u540e\u7684\u547d\u4ee4\u884c\u4e2d\u7684\u81ea\u53d8\u91cf\u3002 <\/p><br\/><p>\u3000\u3000 <a href=https:\/\/www.cppentry.com style=text-decoration:underline;font-size:14px;color:#F70968; target=_blank>java<\/a> HelloWorldApp args[0] args[1]\u00b7 \u00b7 \u00b7 \u00b7 <\/p><br\/><p>\u3000\u3000 \u7b2c 6 \u884c <\/p><br\/><p>\u3000\u3000 \u7b2c 6 \u884c\u58f0\u660e\u5982\u4f55\u4f7f\u7528\u7c7b\u540d\u3001\u5bf9\u8c61\u540d\u548c\u65b9\u6cd5\u8c03\u7528\u3002\u5b83\u4f7f\u7528\u7531 System \u7c7b\u7684 out \u6210\u5458\u5f15\u7528\u7684 PrintStream \u5bf9\u8c61\u7684 println()\u65b9\u6cd5\uff0c\u5c06\u5b57\u4e32\u201cHello World!\u201d\u6253\u5370\u5230\u6807\u51c6\u8f93\u51fa\u4e0a\u3002 <\/p><br\/><p>\u3000\u3000 6 System.out.println(\u201cHello World!\u201d); <\/p><br\/><p>\u3000\u3000 \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cprintln()\u65b9\u6cd5\u88ab\u8f93\u5165\u4e86\u4e00\u4e2a\u5b57\u4e32\u81ea\u53d8\u91cf\u5e76\u5c06\u5176\u5199\u5728\u4e86\u6807\u51c6\u8f93\u51fa\u6d41\u4e0a\u3002 <\/p><br\/><p>\u3000\u3000 \u7b2c 7-8 \u884c <\/p><br\/><p>\u3000\u3000 \u672c\u7a0b\u5e8f\u7684 7-8 \u884c\u5206\u522b\u662f\u65b9\u6cd5 main()\u548c\u7c7b HelloWorldApp \u7684\u4e0b\u62ec\u53f7\u3002 <\/p><br\/><p>\u3000\u3000 7 \uff5d <\/p><br\/><p>\u3000\u3000 8 \uff5d <\/p><br\/><p>\u3000\u3000 3 \uff1a\u7f16\u8bd1\u5e76\u8fd0\u884c HelloWorldApp <\/p><br\/><p>\u3000\u3000 \u7f16\u8bd1 <\/p><br\/><p>\u3000\u3000 \u5f53\u4f60\u521b\u5efa\u4e86 HelloWorldApp.<a href=https:\/\/www.cppentry.com style=text-decoration:underline;font-size:14px;color:#F70968; target=_blank>java<\/a> \u6e90\u6587\u4ef6\u540e\uff0c\u7528\u4e0b\u5217\u7a0b\u5e8f\u884c\u8fdb\u884c\u7f16\u8bd1\uff1a <\/p><br\/><p>\u3000\u3000 javac HelloWorldApp.java <\/p><br\/><p>\u3000\u3000\u5982\u679c\u7f16\u8bd1\u5668\u672a\u8fd4\u56de\u4efb\u4f55\u63d0\u793a\u4fe1\u606f\uff0c \u65b0\u6587\u4ef6 HelloWorldApp.class \u5219\u88ab\u5b58\u50a8\u5728\u4e0e\u6e90\u6587\u4ef6\u76f8\u540c\u7684\u76ee\u5f55\u4e2d\uff0c\u9664\u975e\u53e6\u6709\u6307\u5b9a\u3002 <\/p><br\/><p>\u3000\u3000\u5982\u679c\u5728\u7f16\u8bd1\u4e2d\u9047\u5230\u95ee\u9898\uff0c\u8bf7\u53c2\u9605\u672c\u6a21\u5757\u7684\u67e5\u9519\u63d0\u793a\u4fe1\u606f\u90e8\u5206\u3002 <\/p><br\/><p>\u3000\u3000\u8fd0\u884c <\/p><br\/><p>\u3000\u3000\u4e3a\u8fd0\u884c\u4f60\u7684 HelloWorldApp \u5e94\u7528\u7a0b\u5e8f\uff0c\u9700\u4f7f\u7528 Java \u89e3\u91ca\u5668\u548c\u4f4d\u4e8e bin \u76ee\u5f55\u4e0b\u7684 java\u7a0b\u5e8f: <\/p><br\/><p>\u3000\u3000java HelloWorldApp <\/p><br\/><p>\u3000\u3000Hello World! <\/p><br\/><p>\u3000\u30004 \uff1a\u7f16\u8bd1 \u5dee\u9519 <\/p><br\/><p>\u3000\u3000\u7f16\u8bd1\u65f6\u7684\u9519\u8bef\uff0c\u4ee5\u4e0b\u662f\u7f16\u8bd1\u65f6\u7684\u5e38\u89c1\u9519\u8bef\uff1a <\/p><br\/><p>\u3000\u3000javac:Command not found <\/p><br\/><p>\u3000\u3000PATH \u53d8\u91cf\u672a\u6b63\u786e\u8bbe\u7f6e\u4ee5\u5305\u62ec javac \u7f16\u8bd1\u5668\u3002javac \u7f16\u8bd1\u5668\u4f4d\u4e8e JDK \u76ee\u5f55\u4e0b\u7684 bin \u76ee\u5f55\u3002 <\/p><br\/><p>\u3000\u3000HelloWorldApp.java:6: Method printl(java.lang.String) <\/p><br\/><p>\u3000\u3000not found in class java.io.PrintStream.System. <\/p><br\/><p>\u3000\u3000out.printl (\"Hello World!\"); <\/p><br\/><p>\u3000\u3000\u65b9\u6cd5\u540d println \u51fa\u73b0\u6253\u5370\u9519\u8bef\u3002 <\/p><br\/><p>\u3000\u3000In class HelloWorldApp:main must be public or static <\/p><br\/><p>\u3000\u3000\u8be5\u9519\u8bef\u7684\u51fa\u73b0\u662f\u56e0\u4e3a\u8bcd static \u6216 public \u88ab\u653e\u5728\u4e86\u5305\u542b main \u65b9\u6cd5\u7684\u884c\u4e4b\u5916\u3002 <\/p><br\/><p>\u3000\u3000\u8fd0\u884c\u65f6\u7684\u9519\u8bef can\u2019t find class HelloWorldApp\uff08\u8fd9\u4e2a\u9519\u8bef\u662f\u5728\u6253\u5370 java HelloWorldApp\u65f6\u4ea7\u751f\u7684\uff09 \uff0c \u901a\u5e38, \u5b83\u8868\u793a\u5728\u547d\u4ee4\u884c\u4e2d\u6240\u6307\u5b9a\u7684\u7c7b\u540d\u7684\u62fc\u5199\u4e0e filename.class \u6587\u4ef6\u7684\u62fc\u5199\u4e0d\u540c\u3002Java \u7f16\u7a0b\u8bed\u8a00\u662f\u4e00\u79cd\u5927\u5c0f\u5199\u533a\u522b\u5bf9\u5f85\u7684\u8bed\u8a00\u3002 <\/p><br\/><p>\u3000\u3000\u4f8b\u5982\uff1a public class HelloWorldapp { <\/p><br\/><p>\u3000\u3000\u521b\u5efa\u4e86\u4e00\u4e2a HellloWorldapp.class \uff0c\u5b83\u4e0d\u662f\u7f16\u8bd1\u5668\u6240\u9884\u671f\u7684\u7c7b\u540d(HelloWorldApp.class)\u3002 <\/p><br\/><p>\u3000\u30004.1\uff1a\u547d\u540d <\/p><br\/><p>\u3000\u3000\u5982\u679c java \u6587\u4ef6\u5305\u62ec\u4e00\u4e2a\u516c\u5171\u7c7b\uff0c\u90a3\u4e48\u5b83\u5fc5\u987b\u4f7f\u7528\u4e0e\u90a3\u4e2a\u516c\u5171\u7c7b\u76f8\u540c\u7684\u6587\u4ef6\u540d\u3002\u4f8b\u5982\u5728\u524d\u4f8b\u4e2d\u7684\u7c7b\u7684\u5b9a\u4e49\u662f <\/p><br\/><p>\u3000\u3000public class HelloWorldapp <\/p><br\/><p>\u3000\u3000\u6e90\u6587\u4ef6\u540d\u5219\u5fc5\u987b\u662f HelloWorldapp.java <\/p><br\/><p>\u3000\u30004.2\uff1a\u7c7b\u8ba1\u6570 <\/p><br\/><p>\u3000\u3000\u5728\u6e90\u6587\u4ef6\u4e2d\u6bcf\u6b21\u53ea\u80fd\u5b9a\u4e49\u4e00\u4e2a\u516c\u5171\u7c7b\u3002 <\/p><br\/><p>\u3000\u30004.3\uff1a\u6e90\u6587\u4ef6\u5e03\u5c40 <\/p><br\/><p>\u3000\u3000\u4e00\u4e2a Java \u6e90\u6587\u4ef6\u53ef\u5305\u542b\u4e09\u4e2a\u201c\u9876\u7ea7\u201d\u8981\u7d20\uff1a <\/p><br\/><p>\u3000\u3000\uff081\uff09\u4e00\u4e2a\u5305(package)\u58f0\u660e\uff08\u53ef\u9009\uff09 <\/p><br\/><p>\u3000\u3000\uff082\uff09\u4efb\u610f\u6570\u91cf\u7684\u5bfc\u5165(import)\u8bed\u53e5 <\/p><br\/><p>\u3000\u3000\uff083\uff09\u7c7b(class)\u58f0\u660e <\/p><br\/><p>\u3000\u3000\u8be5\u4e09\u8981\u7d20\u5fc5\u987b\u4ee5\u4e0a\u8ff0\u987a\u5e8f\u51fa\u73b0\u3002\u5373\uff0c\u4efb\u4f55\u5bfc\u5165\u8bed\u53e5\u51fa\u73b0\u5728\u6240\u6709\u7c7b\u5b9a\u4e49\u4e4b\u524d\uff1b\u5982\u679c\u4f7f\u7528\u5305\u58f0\u660e\uff0c\u5219\u5305\u58f0\u660e\u5fc5\u987b\u51fa\u73b0\u5728\u7c7b\u548c\u5bfc\u5165\u8bed\u53e5\u4e4b\u524d\u3002<\/p><br\/>","orderid":"0","title":"2015\u5e74\u8ba1\u7b97\u673a\u4e8c\u7ea7\u8003\u8bd5Java\u5165\u95e8\u6559\u7a0b\uff1a\u7b80\u5355\u7684Java\u7a0b\u5e8f\u7f16\u5199","smalltitle":"","mid":"0","fname":"\u8ba1\u7b97\u673a\u4e8c\u7ea7\u8003\u8bd5JAVA","special_id":"0","bak_id":"0","info":"0","hits":"898","pages":"1","comments":"0","posttime":"2015-07-16 12:01:14","list":"1437019274","username":"admin","author":"","copyfrom":"","copyfromurl":"","titlecolor":"","fonttype":"0","titleicon":"0","picurl":"https:\/\/www.cppentry.com\/upload_files\/","ispic":"0","yz":"1","yzer":"","yztime":"0","levels":"0","levelstime":"0","keywords":"<A HREF='https:\/\/www.cppentry.com\/do\/search.php?type=keyword&keyword=2015%C4%EA' target=_blank>2015\u5e74<\/A> <A HREF='https:\/\/www.cppentry.com\/do\/search.php?type=keyword&keyword=%BC%C6%CB%E3%BB%FA' target=_blank>\u8ba1\u7b97\u673a<\/A> <A HREF='https:\/\/www.cppentry.com\/do\/search.php?type=keyword&keyword=%B6%FE%BC%B6' target=_blank>\u4e8c\u7ea7<\/A> <A HREF='https:\/\/www.cppentry.com\/do\/search.php?type=keyword&keyword=%BF%BC%CA%D4' target=_blank>\u8003\u8bd5<\/A> <A HREF='https:\/\/www.cppentry.com\/do\/search.php?type=keyword&keyword=Java' target=_blank>Java<\/A> <A HREF='https:\/\/www.cppentry.com\/do\/search.php?type=keyword&keyword=%C8%EB%C3%C5%BD%CC%B3%CC' target=_blank>\u5165\u95e8\u6559\u7a0b<\/A> <A HREF='https:\/\/www.cppentry.com\/do\/search.php?type=keyword&keyword=%BC%F2%B5%A5' target=_blank>\u7b80\u5355<\/A> <A HREF='https:\/\/www.cppentry.com\/do\/search.php?type=keyword&keyword=%B3%CC%D0%F2' target=_blank>\u7a0b\u5e8f<\/A> <A HREF='https:\/\/www.cppentry.com\/do\/search.php?type=keyword&keyword=%B1%E0%D0%B4' target=_blank>\u7f16\u5199<\/A>","jumpurl":"","iframeurl":"","style":"","template":"a:3:{s:4:\"head\";s:0:\"\";s:4:\"foot\";s:0:\"\";s:8:\"bencandy\";s:0:\"\";}","target":"0","ip":"14.17.22.37","lastfid":"0","money":"0","buyuser":"","passwd":"","allowdown":"","allowview":"","editer":"","edittime":"0","begintime":"0","endtime":"0","description":"2015\u5e74\u8ba1\u7b97\u673a\u4e8c\u7ea7\u8003\u8bd5Java\u5165\u95e8\u6559\u7a0b\uff1a\u7b80\u5355\u7684Java\u7a0b\u5e8f\u7f16\u5199","lastview":"1713893323","digg_num":"9809","digg_time":"0","forbidcomment":"0","ifvote":"0","heart":"","htmlname":"","city_id":"0"},"page":"1"}