{"id":31108,"date":"2023-12-16T15:22:14","date_gmt":"2023-09-05T13:57:14","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/java%e6%96%b9%e6%b3%95\/"},"modified":"2025-08-12T22:22:02","modified_gmt":"2025-08-12T14:22:02","slug":"java%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java%e6%96%b9%e6%b3%95\/","title":{"rendered":"Java\u65b9\u6cd5"},"content":{"rendered":"

\u9996\u5148\u5728\u4e0a\u4e00\u6b21\u53d1\u5e03\u7684\u5e16\u5b50\u4e2d\u88ab\u8bc6\u522b\u4e3a\u5783\u573e\u90ae\u4ef6\uff0c\u4f60\u597d\u3002<\/p>\n

\u65b9\u6cd5\u30fb\u65b9\u6cd5(method)\u5c31\u50cf\u96f6\u4ef6\u6216\u8005\u6e38\u620f\u6280\u80fd(\u7c7b(Class)\u5c31\u50cf\u72b6\u6001\u7684\u611f\u89c9)\u3002
\n\u30fb\u5982\u679c\u4e0d\u5199\u5728\u7c7b\u7684{}\uff08\u4ee3\u7801\u5757\uff09\u4e2d\uff0c\u65b9\u6cd5\u5c31\u65e0\u6cd5\u8fd0\u884c\u3002
\n\u30fb\u901a\u8fc7\u4f7f\u7528\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5728\u591a\u6b21\u6267\u884c\u76f8\u540c\u5904\u7406\u65f6\uff0c\u53ea\u9700\u8c03\u7528\u65b9\u6cd5\u800c\u4e0d\u5fc5\u91cd\u590d\u7f16\u5199\u76f8\u540c\u5904\u7406\uff0c\u975e\u5e38\u65b9\u4fbf\u3002
\n\u30fb\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u7ba1\u7406\u53d8\u5f97\u66f4\u52a0\u8f7b\u677e\u3002<\/p>\n
public<\/span> static<\/span> void<\/span> \u30e1\u30bd\u30c3\u30c9\u540d<\/span>()<\/span> {<\/span>\r\n \u5b9f\u884c\u3059\u308b\u51e6\u7406<\/span> ;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\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    banana<\/span>()<\/span> ;<\/span>  \/\/()\u306f\u5fc5\u8981\u3002<\/span>\r\n   }<\/span>\r\n\r\n   public<\/span> static<\/span> void<\/span> banana<\/span>()<\/span> {<\/span>\r\n    System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"\u9ec4\u8272\"<\/span>)<\/span> ;<\/span>\r\n   }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u623b\u308a\u5024\u6307\u7684\u662f\u88ab\u8c03\u7528\u7684\u65b9\u6cd5\u4ece\u8c03\u7528\u5b83\u7684\u65b9\u6cd5\u8fd4\u56de\u7684\u6570\u503c\uff08\u6570\u636e\uff09\u3002<\/p>\n
public static void main(String[] args) {\u3000}\u516c\u5171\u7684 \u9759\u6001 \u7a7a\u8fd4\u56de\u7c7b\u578b \u4e3b\u51fd\u6570 (\u5b57\u7b26\u4e32\u7c7b\u578b \u6570\u7ec4\u53c2\u6570){ }<\/p>\n
\u5982\u679c\u6267\u884cJava\u7a0b\u5e8f\uff0c\u5b83\u4f1a\u81ea\u52a8\u4ecemain\u65b9\u6cd5\u5f00\u59cb\u3002
\nmain\u65b9\u6cd5\u4f1a\u7ed9\u51fa\u6307\u793a\u7ed9\u5404\u4e2a\u65b9\u6cd5\uff0c\u652f\u6301\u7684\u65b9\u6cd5\u4f1a\u6267\u884c\u5404\u81ea\u7684\u5904\u7406\u3002<\/p>\n
\u5982\u679c\u8bb0\u5f97\u5199\u4e0b\u6765\u7684\u8bdd\uff0c\u73b0\u5728\u4e00\u5207\u90fd\u6ca1\u95ee\u9898\u3002<\/p>\n
\u4f20\u9012-\u30fb\u7c7b\u4f3c\u4e8e\u5728\u65b9\u6cd5\u4e2d\u63d0\u4f9b\u989d\u5916\u4fe1\u606f\u7684\u4e1c\u897f\u3002
\n\u30fb\u5728\u8c03\u7528\u65b9\u6cd5\u65f6\uff0c\u53ef\u4ee5\u4ece\u8c03\u7528\u8005\u4f20\u9012\u503c\u3002
\n\u30fb\u8fd9\u6837\uff0c\u4f20\u9012\u7684\u503c\u5728\u65b9\u6cd5\u5185\u90e8\u4e5f\u53ef\u4ee5\u88ab\u4f7f\u7528\u3002<\/p>\n
\u4e3a\u4e86\u5b9a\u4e49\u4e00\u4e2a\u80fd\u591f\u63a5\u6536\u53c2\u6570\u7684\u65b9\u6cd5\uff0c\u5728\u65b9\u6cd5\u5b9a\u4e49\u7684\u90e8\u5206\uff0c\u9700\u8981\u6307\u5b9a\u4e00\u4e2a\u7528\u4e8e\u63a5\u6536\u53c2\u6570\u7684\u53d8\u91cf\uff08\u5f62\u5f0f\u53c2\u6570\uff09\uff0c\u5c06\u5f62\u5f0f\u53c2\u6570\u6307\u5b9a\u5728 public static void banana() \u7684()\u4e2d\u3002
\n\u5f62\u5f0f\u53c2\u6570\u548c\u53d8\u91cf\u5b9a\u4e49\u4e00\u6837\uff0c\u9700\u8981\u6307\u5b9a\u6570\u636e\u7c7b\u578b\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    banana<\/span>(<\/span>\"\u8d64\"<\/span>)<\/span> ;<\/span>  \r\n   }<\/span>\r\n\r\n   public<\/span> static<\/span> void<\/span> banana<\/span>(<\/span>String<\/span> color<\/span>)<\/span> {<\/span> \/\/\u30c7\u30fc\u30bf\u578b\u3092\u6307\u5b9a<\/span>\r\n    System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"\u3053\u306e\u30d0\u30ca\u30ca\u306e\u8272\u306f\"<\/span> +<\/span> color<\/span> +<\/span> \"\u3067\u3059\u3002\"<\/span>)<\/span> ;<\/span>\r\n   }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5373\u4f7f\u6ca1\u6709\u8981\u4ea4\u4ed8\u7684\u4fe1\u606f\uff0c( ) \u4e5f\u662f\u5fc5\u8981\u7684\uff0c\u5fc5\u987b\u586b\u5199\u3002<\/p>\n
\u5982\u679c\u8981\u4f20\u9012\u591a\u4e2a\u53c2\u6570<\/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    banana<\/span>(<\/span>\"\u30d5\u30a3\u30ea\u30d4\u30f3\"<\/span>,<\/span> 5<\/span>)<\/span> ;<\/span>  \r\n   }<\/span>\r\n\r\n   public<\/span> static<\/span> void<\/span> banana<\/span>(<\/span>String<\/span> origin<\/span>,<\/span> int<\/span> year<\/span>)<\/span> {<\/span> \r\n    System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"\u3053\u306e\u30d0\u30ca\u30ca\u306f\"<\/span> +<\/span> origin<\/span> +<\/span> \"\u7523\u306e\"<\/span> +<\/span> year<\/span> +<\/span> \"\u5e74\u3082\u306e\u3067\u3059\u3002\"<\/span>)<\/span> ;<\/span>\r\n   }<\/span>\r\n}<\/span>\r\n\r\n\u5b9f\u884c\u7d50\u679c<\/span>\r\n\u3053\u306e\u30d0\u30ca\u30ca\u306f\u30d5\u30a3\u30ea\u30d4\u30f3\u7523\u306e5\u5e74\u3082\u306e\u3067\u3059<\/span>\u3002<\/span>\/\/\u305d\u308c\u306f\u8150\u3063\u3066\u307e\u3059<\/span>\r\n\r\n<\/code><\/pre>\n
\u8fd4\u56de\u503c
\n\u5c06\u503c\u8fd4\u56de\u7ed9\u8c03\u7528\u65b9\u3002<\/p>\n
\u30fb\u8fd4\u56de
\nretune\u662f\u4e00\u4e2a\u7acb\u5373\u7ed3\u675f\u65b9\u6cd5\u5e76\u8fd4\u56de\u503c\u7684\u64cd\u4f5c\u3002
\nreturn\u5728\u4e00\u4e2a\u65b9\u6cd5\u4e2d\u8981\u4e48\u6709\u8fd4\u56de\u503c\uff0c\u8981\u4e48\u6ca1\u6709\u8fd4\u56de\u503c\uff0c\u7edd\u5bf9\u662f\u5176\u4e2d\u4e4b\u4e00\u3002\u5177\u4f53\u53d6\u51b3\u4e8e\u65b9\u6cd5\u7684\u58f0\u660e\u65b9\u5f0f\uff0c\u5c24\u5176\u662f\u8fd4\u56de\u503c\u7684\u5b58\u5728\u4e0e\u5426\u3002<\/p>\n
\u5982\u679c\u65b9\u6cd5\u7684\u58f0\u660e\u4e2d\u8fd4\u56de\u7c7b\u578b\u662fvoid\uff0c\u5219\u5fc5\u987b\u5728return\u8bed\u53e5\u4e2d\u6307\u5b9a\u4e00\u4e2a\u503c\u4f5c\u4e3a\u8fd4\u56de\u503c\uff0c\u6216\u8005\u4e00\u4e2a\u6307\u5411\u8868\u793a\u8fd4\u56de\u503c\u7684\u5b9e\u4f8b\u7684\u53d8\u91cf\u3002<\/p>\n
\u4ee5\u4e0b\u662f\u6570\u636e\u7c7b\u578b\u7684\u5217\u8868\uff0c\u8be6\u89c1https:\/\/java-code.jp\/68<\/p>\n
\r\n   public<\/span> static<\/span> \u623b\u308a\u5024\u306e\u30c7\u30fc\u30bf\u578b<\/span> \u30e1\u30bd\u30c3\u30c9\u540d<\/span>(<\/span>\u5f15\u6570<\/span>)<\/span> {<\/span>\r\n    retune<\/span> \u623b\u308a\u5024<\/span> ;<\/span>  \r\n   }<\/span>\r\n\r\n   public<\/span> static<\/span> int<\/span> add<\/span>(<\/span>int<\/span> a<\/span>,<\/span> int<\/span> b<\/span>)<\/span> {<\/span> \/\/\u30c7\u30fc\u30bf\u578b\u304cint\u3060\u304b\u3089\u6574\u6570\u3067\u8fd4\u3059<\/span>\r\n    retune<\/span> a<\/span> +<\/span> b<\/span>;<\/span>\r\n   }<\/span>\r\n<\/code><\/pre>\n
\u56de\u62a5\u8bf4\u660e\u5012\u4e0d\u5982\u6df1\u5165\u7406\u89e3\u6570\u636e\u7c7b\u578b\/\/\u4e2a\u4eba\u5907\u5fd8\u5f55<\/p>\n
\u8d85\u8f7d\u53ef\u4ee5\u4f7f\u7528\u76f8\u540c\u7684\u65b9\u6cd5\u540d\uff0c\u53ea\u662f\u53c2\u6570\u7684\u7c7b\u578b\u548c\u6570\u91cf\u4e0d\u540c\uff0c\u6765\u5b9a\u4e49\u591a\u4e2a\u65b9\u6cd5\u3002
\n\u5373\u4f7f\u6709\u540c\u540d\u7684\u65b9\u6cd5\uff0c\u8ba1\u7b97\u673a\u4e5f\u53ef\u4ee5\u6839\u636e\u4e0d\u540c\u7684\u53c2\u6570\u6765\u5224\u65ad\u5e94\u8be5\u8c03\u7528\u54ea\u4e2a\u65b9\u6cd5\u3002<\/p>\n
\u8bf7\u5728\u4e2d\u56fd\u672c\u5730\u5316\u8bed\u5883\u4e2d\u8fdb\u884c\u6539\u5199\uff0c\u4ec5\u63d0\u4f9b\u4e00\u79cd\u9009\u62e9\uff1a<\/p>\n
\r\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    nameData<\/span>(<\/span>fullName<\/span>(<\/span>\"\u7530\u4e2d\"<\/span>,<\/span> \"\u4e00\u90ce\"<\/span>),<\/span> 25<\/span>);<\/span> \/\/\u540c\u3058\u30e1\u30bd\u30c3\u30c9\u540d\u3060\u304c\u6570\u304c\u9055\u3046<\/span>\r\n    nameData<\/span>(<\/span>fullName<\/span>(<\/span>\"\u4f50\u85e4\"<\/span>,<\/span> \"\u30de\u30e1\u30b7\u30d0\"<\/span>,<\/span> \"\u4e8c\u90ce\"<\/span>),<\/span> 38<\/span>);<\/span> \/\/\u540c\u3058\u30e1\u30bd\u30c3\u30c9\u540d\u3060\u304c\u6570\u304c\u9055\u3046<\/span>\r\n  }<\/span>\r\n\r\n  public<\/span> static<\/span> void<\/span> nameData<\/span>(<\/span>String<\/span> name<\/span>,<\/span> int<\/span> age<\/span>)<\/span> {<\/span>\r\n   System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"\u540d\u524d\u306f\"<\/span> +<\/span> name<\/span> +<\/span> \"\u3067\u5e74\u9f62\u306f\"<\/span> +<\/span> age<\/span> +<\/span> \"\u3067\u3059\"<\/span>);<\/span> \/\/\u5f15\u6570\u3092\u5909\u3048\u3066\u3084\u308a\u305f\u3044\u540c\u3058\u51e6\u7406<\/span>\r\n  }<\/span>\r\n\r\n  public<\/span> static<\/span> String<\/span> fullName<\/span>(<\/span>String<\/span> firstName<\/span>,<\/span> String<\/span> lastName<\/span>)<\/span> {<\/span> \/\/\u7530\u4e2d\u306e\u65b9\u304c\u767a\u52d5\u3059\u308b<\/span>\r\n   return<\/span> firstName<\/span> +<\/span> \" \"<\/span> +<\/span> lastName<\/span>;<\/span>\r\n  }<\/span>\r\n\r\n  public<\/span> static<\/span> String<\/span> fullName<\/span>(<\/span>String<\/span> firstName<\/span>,<\/span> String<\/span> middleName<\/span>,<\/span> String<\/span> lastName<\/span>)<\/span> {<\/span> \/\/\u4f50\u85e4\u306e\u65b9\u304c\u767a\u52d5\u3059\u308b<\/span>\r\n   return<\/span> firstName<\/span> +<\/span> \" \"<\/span> +<\/span> middleName<\/span> +<\/span> \" \"<\/span> +<\/span> lastName<\/span>;<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4f5c\u4e3a\u4e3b\u8981\u4f7f\u7528Override\u7684\u539f\u56e0\u662f\u60f3\u8981\u4f7f\u7528\u4e0d\u540c\u7684\u53c2\u6570\u6765\u6267\u884c\u76f8\u540c\u7684\u64cd\u4f5c\u3002<\/p>\n
\u6700\u540e\u5728\u8def\u9014\u4e2d\u6295\u7a3f\u65f6\u82b1\u8d39\u4e86\u5f88\u591a\u65f6\u95f4\u624d\u5b8c\u6210\u3002
\n\u5bf9\u4e8e\u8fd4\u56de\u503c\u548c\u91cd\u8f7d\uff0c\u6211\u53ea\u80fd\u6a21\u7cca\u7406\u89e3\u3002
\n\u7948\u7977\u80fd\u591f\u9010\u6e10\u719f\u6089\u5e76\u7406\u89e3\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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