{"id":31137,"date":"2023-06-08T21:17:16","date_gmt":"2023-08-06T11:18:22","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/java%e8%be%93%e5%87%ba%e6%96%b9%e6%b3%95\/"},"modified":"2025-08-12T22:31:06","modified_gmt":"2025-08-12T14:31:06","slug":"java%e8%be%93%e5%87%ba%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java%e8%be%93%e5%87%ba%e6%96%b9%e6%b3%95\/","title":{"rendered":"Java\u8f93\u51fa\u65b9\u6cd5"},"content":{"rendered":"

\u4e3b\u65b9\u6cd5<\/h1>\n

\u5728main\u65b9\u6cd5\u4e2d\u6709\u4ee5\u4e0b\u4e24\u4e2a\u89c4\u5219\u3002<\/p>\n

\u2460 \u6267\u884c\u6587\u4ef6\u4f1a\u8fd0\u884cmain\u65b9\u6cd5\u3002
\n\u2461 main\u65b9\u6cd5\u7684\u53c2\u6570\u7b49\u5fc5\u987b\u6309\u7167\u89c4\u5b9a\u7684\u65b9\u5f0f\u8fdb\u884c\u63cf\u8ff0\u3002<\/p>\n

\u5f53\u6211\u4eec\u5728replit\u4e0a\u7f16\u5199\u4ee3\u7801\u65f6\uff0c\u6267\u884c\u6587\u4ef6\u65f6\u4f1a\u6267\u884cmain\u65b9\u6cd5\u3002<\/p>\n

class<\/span> Main<\/span> {<\/span>\r\n  public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>  \r\n      \/\/ \u3053\u3053\u306b\u51e6\u7406\u3092\u66f8\u304f<\/span>\r\n  {<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5f53\u67e5\u770b\u7b2c\u4e8c\u884c\u65f6\uff0c\u53ef\u4ee5\u770b\u5230 “main” \u8fd9\u4e2a\u5b57\uff0c\u5b83\u8868\u793a\u7684\u662f\u65b9\u6cd5\u540d\u3002<\/p>\n
\u6362\u53e5\u8bdd\u8bf4\uff0c\u4e4b\u524d\u6240\u5199\u7684\u4ee3\u7801\u5b9e\u9645\u4e0a\u662f\u5b9a\u4e49\u4e86main\u65b9\u6cd5\u7684\u5185\u5bb9\u3002
\n\u5728Java\u4e2d\uff0cmain\u65b9\u6cd5\u6709\u4e00\u4e2a\u89c4\u5219\uff0c\u5373\u5728\u6587\u4ef6\u6267\u884c\u65f6\u4f1a\u81ea\u52a8\u6267\u884c\u3002\u56e0\u6b64\uff0c\u65e0\u9700\u7f16\u5199\u6267\u884cmain\u65b9\u6cd5\u7684\u4ee3\u7801\uff0c\u5b83\u5c31\u4f1a\u81ea\u52a8\u6267\u884c\u3002<\/p>\n
\u2461 \u4e3b\u65b9\u6cd5\u7684\u53c2\u6570\u7b49\u5fc5\u987b\u6309\u7167\u89c4\u5b9a\u7684\u65b9\u5f0f\u8fdb\u884c\u63cf\u8ff0
\n\u4e00\u822c\u7684\u65b9\u6cd5\u53ef\u4ee5\u66f4\u6539\u53c2\u6570\u8bbe\u7f6e\u7b49\u5185\u5bb9\uff0c\u4f46\u662f\u5173\u4e8e\u4e3b\u65b9\u6cd5\u7684\u5199\u6cd5\u662f\u89c4\u5b9a\u597d\u7684\u3002<\/p>\n
\u5982\u679c\u66f4\u6539\u4e86\u6570\u636e\u7c7b\u578b\u7b49\uff0c\u5c06\u4f1a\u53d1\u751f\u9519\u8bef\uff0c\u56e0\u6b64\u9700\u8981\u6309\u7167\u4ee5\u4e0b\u65b9\u5f0f\u8fdb\u884c\u63cf\u8ff0\u3002<\/p>\n
public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>  \r\n      \/\/ \u3053\u3053\u306b\u51e6\u7406\u3092\u66f8\u304f<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8ba9\u6211\u4eec\u5c1d\u8bd5\u4f7f\u7528\u65b9\u6cd5\uff08\u5982\u679c\u6ca1\u6709\u53c2\u6570\uff09<\/h1>\n
Java\u4e2d\u4f7f\u7528\u65b9\u6cd5\u7a0d\u5fae\u590d\u6742\uff0c\u56e0\u6b64\u6211\u4eec\u5c06\u5206\u4e3a\u4ee5\u4e0b\u4e24\u4e2a\u90e8\u5206\u6765\u5b66\u4e60\u3002<\/p>\n
\u2460 \u5982\u4f55\u4f7f\u7528\u4e0d\u5e26\u53c2\u6570\u7684\u65b9\u6cd5
\n\u2461 \u5982\u4f55\u4f7f\u7528\u5e26\u53c2\u6570\u7684\u65b9\u6cd5<\/p>\n
\u9996\u5148\uff0c\u6211\u4eec\u5c06\u786e\u8ba4\u5173\u4e8e\u4e0d\u4f7f\u7528\u2460\u53c2\u6570\u7684\u6700\u7b80\u5355\u7684\u7528\u6cd5\u3002<\/p>\n
class<\/span> Main<\/span> {<\/span>\r\n  public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>  \r\n    sayHello<\/span>();<\/span>\r\n  }<\/span>\r\n\r\n  public<\/span> static<\/span> void<\/span> sayHello<\/span>()<\/span> {<\/span>\r\n    System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Hello World\"<\/span>);<\/span>\r\n    return<\/span>;<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8fd0\u884c\u4ee3\u7801\u540e\uff0c\u4f1a\u663e\u793a\u5982\u4e0b\u5185\u5bb9\uff1a\u201c\u4f60\u597d\uff0c\u4e16\u754c\u201d\u3002<\/p>\n
><\/span> sh -c<\/span> javac -classpath<\/span> .:target\/dependency\/*<\/span> -d<\/span> .<\/span> $(<\/span>find .<\/span> -type<\/span> f -name<\/span> '*.java'<\/span>)<\/span>\r\n><\/span> java -classpath<\/span> .:target\/dependency\/*<\/span> Main\r\nHello World\r\n<\/span><\/code><\/pre>\n
\u5b9a\u4e49\u57fa\u672c\u65b9\u6cd5\u7684\u8bed\u6cd5\u5982\u4e0b\u3002<\/p>\n
\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50<\/span> static\u4fee\u98fe\u5b50<\/span> \u8fd4\u308a\u5024\u306e\u30c7\u30fc\u30bf\u578b<\/span> \u30e1\u30bd\u30c3\u30c9\u540d<\/span>()<\/span> {<\/span>\r\n  \/\/ \u884c\u3044\u305f\u3044\u51e6\u7406<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\"image.png\"<\/div>\n
\u4e3a\u4e86\u5b9a\u4e49\u4e00\u4e2a\u65b9\u6cd5\uff0c\u9700\u8981\u6307\u5b9a\u8fd4\u56de\u503c\u7684\u6570\u636e\u7c7b\u578b\u3002
\n\u5728Java\u4e2d\uff0c\u4e0eRuby\u4e0d\u540c\u7684\u662f\uff0cJava\u65b9\u6cd5\u7684\u5b9a\u4e49\u6709\u4ee5\u4e0b\u51e0\u70b9\u4e0d\u540c\uff1a
\n\u2460 \u9700\u8981\u6307\u5b9a\u8fd4\u56de\u503c\u7684\u6570\u636e\u7c7b\u578b\u3002
\n\u2461 \u5373\u4f7f\u662f\u6ca1\u6709\u53c2\u6570\u7684\u65b9\u6cd5\uff0c\u5728\u5b9a\u4e49\u65f6\u4e5f\u4e0d\u80fd\u7701\u7565\u62ec\u53f7\u3002
\n\u2462 \u4e0d\u50cfRuby\u4e2d\u4f7f\u7528\u300cdef\u300d\u300cend\u300d\uff0cJava\u8981\u7528\u5927\u62ec\u53f7\u6765\u5305\u56f4\u4ee3\u7801\u3002<\/p>\n
\"image.png\"<\/div>\n
\u5373\u4f7f\u4e00\u4e2a\u65b9\u6cd5\u6ca1\u6709\u53c2\u6570\uff0c\u5728\u5b9a\u4e49\u65f6\u4e5f\u4e0d\u80fd\u7701\u7565\u62ec\u53f7\u3002\u62ec\u53f7\u662f\u5fc5\u8981\u7684\uff0c\u5fc5\u987b\u5199\u6210\u300csayHello()\u300d\u5f62\u5f0f\u3002<\/p>\n
\u5728Ruby\u4e2d\uff0c\u9700\u8981\u4f7f\u7528”def”\u6765\u8868\u793a\u65b9\u6cd5\u7684\u5f00\u59cb\u3002\u800c\u5728Java\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528”{“\u548c”}”\u6765\u5c06\u8981\u6267\u884c\u7684\u4ee3\u7801\u62ec\u8d77\u6765\u4ee3\u66ff\u8fd9\u79cd\u63cf\u8ff0\u65b9\u5f0f\u3002<\/p>\n
\u7406\u89e3\u4fee\u98fe\u5b50<\/h1>\n
\"image.png\"<\/div>\n
\u2022 \u516c\u5f00\u7684 de)
\n\u2022 \u4fdd\u62a4\u7684 de)
\n\u2022 \u79c1\u4eba\u7684 de)<\/p>\n
\u5728\u8fd9\u4e2a\u8bfe\u7a0b\u4e2d\uff0c\u6211\u4eec\u5c06\u5bf9\u4f7f\u7528\u9891\u7387\u5f88\u9ad8\u7684\u201cpublic\u201d\u548c\u201cprivate\u201d\u8fdb\u884c\u89e3\u91ca\u3002<\/p>\n
\u5728Ruby\u8bfe\u7a0b\u4e2d\uff0c\u6211\u4eec\u4e5f\u4f7f\u7528\u4e86\u8fd9\u4e2a\u201cprivate\u201d\u63cf\u8ff0\u3002<\/p>\n
\u5728\u63a7\u5236\u5668\u4e2d\u4f7f\u7528private\u5173\u952e\u5b57\u8fdb\u884c\u6807\u6ce8\u540e\uff0c\u53ef\u4ee5\u5c06\u5176\u540e\u7684\u65b9\u6cd5\u8bbe\u7f6e\u4e3a\u79c1\u6709\u65b9\u6cd5\u3002\u79c1\u6709\u65b9\u6cd5\u662f\u65e0\u6cd5\u4ece\u7c7b\u7684\u5916\u90e8\u8c03\u7528\u7684\u65b9\u6cd5\u3002<\/p>\n
\u5728Java\u4e2d\uff0c\u57fa\u672c\u7684\u601d\u60f3\u662f\u76f8\u540c\u7684\u3002\u901a\u8fc7\u4f7f\u7528\u8bbf\u95ee\u4fee\u9970\u7b26\uff0c\u53ef\u4ee5\u8fdb\u884c\u4ee5\u4e0b\u8bbe\u7f6e\u3002<\/p>\n
\n
\u30a2\u30af\u30bb\u30b9\u4fee\u98fe\u5b50\u306e\u7a2e\u985e\u6a5f\u80fdprivate\u540c\u4e00\u30af\u30e9\u30b9\u5185\u304b\u3089\u306e\u307f\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308bpublic\u3069\u306e\u30af\u30e9\u30b9\u304b\u3089\u3067\u3082\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b<\/div>\n<\/div>\n
\u5728Java\u4e2d\uff0c\u88ab\u8ba4\u4e3a\u4e0d\u9700\u8981\u516c\u5f00\u7684\u4e1c\u897f\uff0c\u5efa\u8bae\u5c3d\u53ef\u80fd\u4f7f\u7528private\u3002\u6b64\u5916\uff0c\u8fd9\u4e2a\u8bbf\u95ee\u4fee\u9970\u7b26\u4e0d\u4ec5\u53ef\u4ee5\u7528\u4e8e\u65b9\u6cd5\uff0c\u8fd8\u53ef\u4ee5\u7528\u6765\u8bbe\u7f6e\u7c7b\u548c\u53d8\u91cf\u7684\u516c\u5f00\u8303\u56f4\u3002<\/p>\n
static\u4fee\u98fe\u5b50\u662f\u8868\u793a\u72b6\u6001\u4e0d\u4f1a\u6539\u53d8\u7684\u82f1\u6587\u5355\u8bcd\u3002\u9759\u6001\u8fd9\u4e00\u6982\u5ff5\u6307\u7684\u662f\u72b6\u6001\u4e0d\u4f1a\u6539\u53d8\u7684\u6027\u8d28\u3002<\/p>\n
\u5728\u5b9a\u4e49\u65b9\u6cd5\u65f6\uff0c\u901a\u8fc7\u6dfb\u52a0static\u5173\u952e\u5b57\u53ef\u4ee5\u5c06\u5176\u5b9a\u4e49\u4e3a\u201c\u9759\u6001\u65b9\u6cd5\u201d\u3002\u9759\u6001\u65b9\u6cd5\u4e5f\u88ab\u79f0\u4e3a\u201c\u7c7b\u65b9\u6cd5\u201d\u3002<\/p>\n
\u7c7b\u65b9\u6cd5\u7684\u89d2\u8272\u548c\u7528\u6cd5\u4e0eRuby\u8bfe\u7a0b\u4e2d\u5b66\u5230\u7684\u5185\u5bb9\u57fa\u672c\u76f8\u540c\u3002<\/p>\n
\u5982\u679c\u4e0d\u52a0static\u5173\u952e\u5b57\u7684\u8bdd\uff0c\u5c06\u4f1a\u88ab\u5b9a\u4e49\u4e3a”\u5b9e\u4f8b\u65b9\u6cd5”\u3002<\/p>\n
\u7406\u89e3\u5982\u4f55\u6267\u884c\u8be5\u65b9\u6cd5\u3002<\/p>\n
\u8fd0\u884c\u65b9\u6cd5\u975e\u5e38\u7b80\u5355\u3002<\/p>\n
\u5982\u679c\u65b9\u6cd5\u540d\u4e3a “sayHello”\uff0c\u60a8\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u8c03\u7528\u8be5\u65b9\u6cd5\u3002<\/p>\n
\u8bf7\u6253\u62db\u547c();<\/p>\n
\u5373\u4f7f\u5728\u4e0d\u9700\u8981\u53c2\u6570\u7684\u65b9\u6cd5\u4e2d\uff0c\u4e5f\u8981\u6ce8\u610f\u4e0d\u80fd\u7701\u7565\u62ec\u53f7\u3002<\/p>\n
\u8bd5\u7740\u4f7f\u7528\u65b9\u6cd5\uff08\u5982\u679c\u6709\u53c2\u6570\uff09<\/h1>\n
class<\/span> Main<\/span> {<\/span>\r\n  public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n    var<\/span> answer<\/span> =<\/span> square<\/span>(<\/span>5<\/span>);<\/span>\r\n    System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>answer<\/span>);<\/span>\r\n  }<\/span>\r\n\r\n  public<\/span> static<\/span> int<\/span> square<\/span>(<\/span>int<\/span> number<\/span>){<\/span>\r\n    return<\/span> number<\/span> *<\/span> number<\/span>;<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u4f60\u80fd\u591f\u7f16\u5199\u4ee3\u7801\uff0c\u90a3\u5c31\u6267\u884c\u4e00\u4e0b\u5427\u3002<\/p>\n
\u7531\u4e8e\u8fd9\u6bb5\u4ee3\u7801\u8ba1\u7b97\u503c\u7684\u5e73\u65b9\uff0c\u5982\u679c\u5c06\u53c2\u6570\u6307\u5b9a\u4e3a\u201c5\u201d\uff0c\u5219\u4f1a\u663e\u793a\u201c25\u201d\u3002<\/p>\n
\"image.png\"<\/div>\n
\u6211\u5c06\u4f7f\u7528\u73b0\u6709\u7684\u4ee3\u7801\u6765\u786e\u8ba4\u8fd9\u4e2a\u6d41\u7a0b\u3002
\n\u4ee5\u4e0b\u662f\u65b9\u6cd5\u7684\u5b9a\u4e49\u65b9\u5f0f\u3002<\/p>\n
public<\/span> static<\/span> int<\/span> square<\/span>(<\/span>int<\/span> number<\/span>){<\/span>\r\n  return<\/span> number<\/span> *<\/span> number<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u51fd\u6570\u53c2\u6570\u88ab\u8bbe\u5b9a\u4e3a\u300cint number\u300d\u3002
\n\u4e0eRuby\u4e0d\u540c\u7684\u662f\uff0c\u4e0d\u4ec5\u9700\u8981\u53d8\u91cf\u540d\u4e3a\u300cnumber\u300d\uff0c\u8fd8\u5fc5\u987b\u6307\u5b9a\u63a5\u6536\u503c\u7684\u6570\u636e\u7c7b\u578b\uff08\u672c\u4f8b\u4e2d\u4e3aint\uff09\u3002<\/p>\n
\u6ce8\u610f\uff1a\u8fd9\u4e2a\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u662f\u6574\u6570\u7c7b\u578b\u3002\u56e0\u6b64\uff0c\u8bf7\u6ce8\u610f\u5728\u65b9\u6cd5\u540d\u524d\u9762\u5199\u4e0a”int”\u3002<\/p>\n
\u53e6\u5916\uff0c\u65b9\u6cd5\u7684\u6267\u884c\u5982\u4e0b\u6240\u8ff0\u3002<\/p>\n
var<\/span> answer<\/span> =<\/span> square<\/span>(<\/span>5<\/span>);<\/span>\r\n<\/code><\/pre>\n
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