{"id":208,"date":"2025-12-23T14:29:38","date_gmt":"2025-12-23T14:29:38","guid":{"rendered":"https:\/\/hyc.eshachem.com\/program\/?p=208"},"modified":"2025-12-23T14:41:25","modified_gmt":"2025-12-23T14:41:25","slug":"%e6%96%b9%e6%b3%95%e3%80%81%e9%a1%9e%e5%88%a5%e8%88%87%e7%89%a9%e4%bb%b6","status":"publish","type":"post","link":"https:\/\/hyc.eshachem.com\/program\/%e6%96%b9%e6%b3%95%e3%80%81%e9%a1%9e%e5%88%a5%e8%88%87%e7%89%a9%e4%bb%b6\/","title":{"rendered":"JAVA – \u65b9\u6cd5\u3001\u985e\u5225\u8207\u7269\u4ef6"},"content":{"rendered":"\n

\u81ea\u8a02\u7fa9\u65b9\u6cd5<\/h1>\n\n\n\n
\"\"<\/figure>\n\n\n\n

\u985e\u4f3c python\u88e1\u7684 def<\/p>\n\n\n\n

\u683c\u5f0f<\/p>\n\n\n

\/\/ \u5beb\u6cd51 - return <\/span>\npublic<\/span> static<\/span> \u8fd4\u56de\u8cc7\u6599\u578b\u5225 name(\u8cc7\u6599\u578b\u5225 \u53c3\u6578, ...) { \/\/\u81ea\u5b9a\u7fa9def\u958b\u59cb\u7684\u5730\u65b9<\/span>\n        return<\/span> ...;\n}\n\/\/ \u5beb\u6cd52 - \u6c92return<\/span>\npublic<\/span> static<\/span> void name(\u8cc7\u6599\u578b\u5225 \u53c3\u6578, ...) {\n    System.out.println(...);\n}\n<\/code><\/span>Code language:<\/span> PHP<\/span> (<\/span>php<\/span>)<\/span><\/small><\/pre>\n\n
public<\/span> class<\/span> IntegerTest<\/span> <\/span>{\n    public<\/span> static<\/span> void main(String[] args) {\n        System.out.println(add(1<\/span>,3<\/span>));\n    }\n    \n    public<\/span> static<\/span> int add(int a, int b) { \/\/\u81ea\u5b9a\u7fa9def\u958b\u59cb\u7684\u5730\u65b9<\/span>\n        return<\/span> a + b;\n    }\n    \n}\/\/ int \u8868\u793a\u6703\u56de\u50b3\u6574\u6578\u503c<\/span>\n<\/code><\/span>Code language:<\/span> PHP<\/span> (<\/span>php<\/span>)<\/span><\/small><\/pre>\n\n\n
\u4e0d\u5b9a\u5f15\u6578\u500b\u6578 Varargs<\/h3>\n\n\n\n
\u4f7f\u7528\u4e09\u500b\u9ede ...<\/code> \u8868\u793a\u4e0d\u5b9a\u5f15\u6578\uff0c\u5207\u8a18 \u2026 \u53ea\u80fd\u5beb\u5728\u6700\u5f8c\u9762<\/p>\n\n\n
void<\/span>  add(int x, int... y)\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
\u4e0d\u5b9a\u5f15\u6578\u5176\u5be6\u662f\u88ab Java \u7de8\u8b6f\u5668\u8655\u7406\u6210\u4e00\u500b \u9663\u5217<\/strong>\uff0c\u6240\u4ee5\u5728\u65b9\u6cd5\u5167\u90e8\uff0c\u4e0d\u5b9a\u5f15\u6578\u6703\u88ab\u7576\u4f5c\u4e00\u500b\u9663\u5217\u4f86\u4f7f\u7528 \u6240\u4ee5<\/p>\n\n\n
public static<\/span> void<\/span> printNumbers(int... numbers) {\n    for<\/span> (int num : numbers) {\n        System.out.println(num);\n    }\n}\nprintNumbers(1<\/span>, 2<\/span>, 3<\/span>); \/\/ \u5370\u51fa 1\u30012\u30013<\/span>\nprintNumbers();        \/\/ \u4e0d\u6703\u5370\u51fa\u4efb\u4f55\u6771\u897f<\/span>\nprintNumbers(10<\/span>);      \/\/ \u5370\u51fa 10<\/span>\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
lambda<\/h1>\n\n\n\n
\u7a2e\u7c21\u6f54\u7684\u65b9\u5f0f\u4f86\u5be6\u4f5c\u533f\u540d\u51fd\u5f0f<\/p>\n\n\n\n
\u4e00\u5b9a\u8981\u6709default<\/p>\n\n\n
\/\/ \u5beb\u6cd51<\/span>\n(parameters) -> expression\n\/\/ \u5beb\u6cd52<\/span>\n(parameters) -> { statements }\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
\u65b9\u6cd5\u591a\u8f09<\/h1>\n\n\n\n
\n
\u540c\u4e00\u500b\u985e\u5225\u4e2d\uff0c\u5b9a\u7fa9\u591a\u500b\u540d\u7a31\u76f8\u540c<\/strong>\u4f46\u53c3\u6578\u4e0d\u540c<\/strong>\u7684\u65b9\u6cd5\u3002<\/p>\n<\/blockquote>\n\n\n\n
Java \u7de8\u8b6f\u5668\u6703\u6839\u64da\u50b3\u5165\u53c3\u6578\u7684\u985e\u578b\u8207\u6578\u91cf<\/strong>\u4f86\u9078\u64c7\u6700\u9069\u5408\u7684\u65b9\u6cd5\u57f7\u884c<\/p>\n\n\n
public class<\/span> Calculator<\/span> <\/span>{\n    \/\/ \u65b9\u6cd5\u591a\u8f09\uff1a\u52a0\u6cd5\u64cd\u4f5c<\/span>\n    public int add(int a, int b) { \/\/ \u63a5\u6536\u5169\u500b\u6574\u6578<\/span>\n        return<\/span> a + b;\n    }\n    \n    public int add(int a, int b, int c) { \/\/ \u63a5\u6536\u4e09\u500b\u6574\u6578<\/span>\n        return<\/span> a + b + c;\n    }\n\n    public String<\/span> add(String<\/span> a, String<\/span> b) { \/\/ \u63a5\u6536\u5169\u500b\u5b57\u4e32<\/span>\n        return<\/span> a + b;\n    }\n\n    public static<\/span> void<\/span> main(String<\/span>[] args) {\n        Calculator calc = new<\/span> Calculator();\/\/\u5efa\u7acb\u7269\u4ef6 \u5f8c\u9762\u6703\u8aaa\u5230 \u5148\u5225\u7ba1<\/span>\n\n        System.out.println(calc.add(10<\/span>, 20<\/span>)); \/\/ \u547c\u53eb int \u7248\u672c\uff0c\u8f38\u51fa 30<\/span>\n        System.out.println(calc.add(10<\/span>, 20<\/span>, 30<\/span>)); \/\/ \u547c\u53eb\u4e09\u53c3\u6578\u7248\u672c\uff0c\u8f38\u51fa 60<\/span>\n        System.out.println(calc.add(\"Hello\"<\/span>, \"World\"<\/span>)); \/\/ \u547c\u53eb\u5b57\u4e32\u7248\u672c\uff0c\u8f38\u51fa HelloWorld<\/span>\n    }\n}\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
\u9019\u88e1\u8981\u4ecb\u7d39\u4e00\u500b\u540d\u8a5e\u53eb<\/p>\n\n\n\n
\u65b9\u6cd5\u7c3d\u540d \u2013 Method Signature<\/h2>\n\n\n\n
\u7fa9\u6307<\/p>\n\n\n\n
    \n
  • \u65b9\u6cd5\u7684\u540d\u7a31<\/strong><\/li>\n\n\n\n
  • \u65b9\u6cd5\u7684\u53c3\u6578\u5217\u8868<\/strong>\uff08\u6578\u91cf\u8207\u578b\u5225\uff09<\/li>\n<\/ul>\n\n\n\n
    \u800c\u6bcf\u500b\u591a\u8f09\u7684\u65b9\u6cd5 \u4ed6\u7684\u65b9\u6cd5\u7c3d\u540d\u90fd\u8981\u662f\u4e0d\u540c\u7684<\/p>\n\n\n\n
    \n
    \u65b9\u6cd5\u7684\u8fd4\u56de\u578b\u5225<\/strong>\uff08Return Type\uff09\u4e0d\u5c6c\u65bc\u65b9\u6cd5\u7c3d\u540d\u7684\u4e00\u90e8\u5206\u3002<\/p>\n<\/blockquote>\n\n\n\n
    \u6240\u4ee5\u4e0b\u65b9\u70ba\u932f\u8aa4\u5beb\u6cd5<\/p>\n\n\n
    void<\/span> method<\/span>() { }\nint<\/span> method<\/span>() { }\n<\/code><\/span>Code language:<\/span> CSS<\/span> (<\/span>css<\/span>)<\/span><\/small><\/pre>\n\n\n
    \u5169\u500b\u65b9\u6cd5\u7684\u540d\u7a31\u76f8\u540c\uff0c\u53c3\u6578\u5217\u8868\u76f8\u540c\uff08\u90fd\u662f\u7a7a\u53c3\u6578\uff09\uff0c\u800c\u8fd4\u56de\u578b\u5225\uff08void<\/code> \u548c int<\/code>\uff09\u4e26\u4e0d\u88ab\u8996\u70ba\u65b9\u6cd5\u7c3d\u540d\u7684\u4e00\u90e8\u5206\u3002\u56e0\u6b64\uff0cJava \u7de8\u8b6f\u5668\u7121\u6cd5\u5340\u5206\u9019\u5169\u500b\u65b9\u6cd5\uff0c\u6703\u62cb\u51fa\u932f\u8aa4\u3002<\/p>\n\n\n\n
    Java\u7684\u6838\u5fc3\u5c31\u662f\u7269\u4ef6\uff0c\u5c0e\u5411\u7c21\u55ae\u4f86\u8aaa\u5c31\u662f\u53ef\u4ee5\u81ea\u8a02\u7fa9\u7684\u8cc7\u6599\u578b\u614b<\/p>\n\n\n\n
    \u5047\u8a2d\u6709\u500b\u7269\u4ef6<\/strong>\u662f\u72d7\uff0c\u5b83\u7684\u7279\u8272<\/strong> \u5982 \u540d\u5b57 \u6591\u7d0b \u984f\u8272\u7b49\uff0c\u800c\u4ed6\u7684\u884c\u70ba<\/strong>\u53ef\u4ee5\u6709 \u8dd1 \u5750\u4e0b \u8df3\u9ad8<\/p>\n\n\n\n
    \u5728\u7269\u4ef6\u5c0e\u5411\u4e2d\uff0c<\/p>\n\n\n\n
    \u6211\u5011\u5c31\u5c07\u9019\u96bb\u72d7\u7684 \u7279\u8272<\/strong> \u7a31\u505a \u5c6c\u6027<\/strong> \u800c \u884c\u70ba<\/strong> \u7a31\u4f5c \u65b9\u6cd5<\/strong><\/p>\n\n\n\n
    \n\n\n\n
    \u5efa\u7acb\u5728\u985e\u5225\u4e2d\u7684\u81ea\u8a02\u7fa9\u51fd\u5f0f<\/h2>\n\n\n
    \/\/\u5beb\u6cd5\u4e00 \u6c92\u6709return <\/span>\nvoid<\/span> sleep(){ \/\/ \u65b9\u6cd5<\/span>\n        System.out.println(name+\"\u6b63\u5728\u7761\u89ba\"<\/span>);\n}\n\/\/\u5beb\u6cd5\u4e8c return<\/span>\nint Deposit(int x){\n        return<\/span> x;  \n}\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
    \u5b9a\u7fa9\u985e\u5225<\/h1>\n\n\n\n
    \"\"<\/figure>\n\n\n\n
    \u5beb\u5728 public class \u6a94\u6848\u540d<\/code><\/strong> \u9019\u884c\u7684\u5916\u9762<\/p>\n\n\n
    class<\/span> \u985e\u5225\u540d\u7a31<\/span>{\n    String<\/span> name; \/\/ \u5c6c\u6027<\/span>\n    void<\/span> sleep(){ \/\/ \u65b9\u6cd5<\/span>\n        System.out.println(name+\"\u6b63\u5728\u7761\u89ba\"<\/span>);\n    }\n}\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
    \u547c\u53eb\u985e\u5225<\/h1>\n\n\n\n
    \u900f\u904e\u5efa\u69cb\u5f0f<\/strong>\u4f86\u5275\u5efa\u7269\u4ef6<\/strong>\u5f8c\u547c\u53eb( \u5f8c\u9762\u6703\u8a73\u8ff0\u5efa\u69cb\u5f0f)<\/p>\n\n\n
    \u985e\u5225\u540d\u7a31 \u7269\u4ef6\u540d\u7a31 = new<\/span> \u5efa\u69cb\u5f0f\u540d\u7a31(\u5f15\u6578)\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
    \u57f7\u884c\u7bc4\u4f8b<\/p>\n\n\n
    class<\/span> Dog<\/span> <\/span>{ \/\/ \u5ba3\u544a\u985e\u5225<\/span>\n    String<\/span> name;\n    void<\/span> sleep(){\n        System.out.println(name+\"\u6b63\u5728\u7761\u89ba\"<\/span>);\n    }\n}\n\npublic class<\/span> Main<\/span> <\/span>{\n    public static<\/span> void<\/span> main(String<\/span>[] args) {\n        Dog myDog = new<\/span> Dog(); \/\/ \u5efa\u7acb\u7269\u4ef6<\/span>\n\n        myDog.name = \"Harry\"<\/span>; \/\/ \u8a2d\u5b9a\u5c6c\u6027\u521d\u503c<\/span>\n        System.out.println(myDog.name);\n        myDog.sleep();\/\/\u547c\u53eb\u65b9\u6cd5<\/span>\n    }\n}\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
    \u7df4\u7fd2<\/h1>\n\n\n\n
    \u88fd\u505a\u9280\u884c\u5e33\u6236\u985e\u5225 \u4f9b\u4f7f\u7528\u8005\u5b58\u5165\u548c\u63d0\u51fa<\/p>\n\n\n
    \/\/\u8f38\u51fa\u7d50\u679c<\/span>\n\u5b58\u5165\u91d1\u984d100\n\u76ee\u524d\u5e33\u6236\u9918\u984d:100<\/span>\n\u5b58\u5165\u91d1\u984d10\n\u76ee\u524d\u5e33\u6236\u9918\u984d:110<\/span>\n\u53d6\u51fa\u91d1\u984d50\n\u76ee\u524d\u5e33\u6236\u9918\u984d:60<\/span>\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n
    \/\/ code<\/span>\nclass<\/span> Bank<\/span> <\/span>{\n    int Balance = 0<\/span>;\n\n    void<\/span> Withdraw(int x){\n        System.out.println(\"\u5b58\u5165\u91d1\u984d\"<\/span>+x);\n        System.out.println(\"\u76ee\u524d\u5e33\u6236\u9918\u984d:\"<\/span> + (Balance+x ));\n        Balance += x ;\n    }\n    void<\/span> Deposit(int x){\n        System.out.println(\"\u53d6\u51fa\u91d1\u984d\"<\/span>+x);\n        System.out.println(\"\u76ee\u524d\u5e33\u6236\u9918\u984d:\"<\/span>+ (Balance-x));\n        Balance-=x;\n    }\n}\n\npublic class<\/span> Main<\/span> <\/span>{\n    public static<\/span> void<\/span> main(String<\/span>[] args) {\n        Bank account = new<\/span> Bank();\n        account.Withdraw(100<\/span>);\n        account.Withdraw(10<\/span>);\n        account.Deposit(50<\/span>);\n    }\n}\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
    \n\n\n\n
    \u6240\u4ee5\u4f60\u6703\u767c\u73fe<\/h1>\n\n\n\n
    \u6211\u5011\u4e4b\u524d\u57f7\u884c\u7684\u7a0b\u5f0f\u78bc<\/p>\n\n\n\n
    \u5176\u5be6\u5c31\u662f\u5728\u4e00\u500b\u540d\u53eb Main \u7684class\u4e0b \u7684 \u81ea\u8a02\u7fa9 \u7121\u56de\u50b3\u503c function \u57f7\u884c\u7684<\/p>\n\n\n\n
    \n
    \u800c\u7269\u4ef6\u662f\u6839\u64da\u985e\u5225\u6240\u7522\u751f\u7684\u5be6\u9ad4(instance)<\/p>\n<\/blockquote>\n\n\n\n
    this<\/h1>\n\n\n\n
    \u5047\u5982\u4f60\u4eca\u5929\u5beb\u5728\u985e\u5225\u88e1\u7684\u51fd\u5f0f \u4f60\u50b3\u9032\u53bb\u7684\u53c3\u6578\u8ddf\u4f60\u539f\u672c\u7684\u53c3\u6578\u649e\u540d<\/p>\n\n\n\n
    \u9019\u6642\u5019\u5c31\u53ef\u4ee5\u7528this<\/p>\n\n\n
    class<\/span> Bank<\/span> <\/span>{\n    int money = 0<\/span>; \/\/\u9810\u8a2d\u4e00\u500b\u8b8a\u6578\u53ebmoney \u5beb\u5728\u6240\u6709\u81ea\u8a02\u7fa9func\u7684\u5916\u9762<\/span>\n\n    void<\/span> Withdraw(int money){\/\/ \u50b3\u9032\u4f86\u7684\u53c3\u6578\u4e5f\u53ebmoney<\/span>\n        System.out.println(\"\u5b58\u5165\u91d1\u984d\"<\/span>+money);\n        System.out.println(\"\u76ee\u524d\u5e33\u6236\u9918\u984d:\"<\/span> + (this<\/span>.money +money ));\n        \/\/ this.money\u6703\u6307\u5411 \u6700\u5916\u9762\u7684\u90a3\u500bmoney<\/span>\n        this<\/span>.money += money ;\n    }\n}\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
    \u82e5\u4eca\u5929\u8981\u5beb\u5728\u4e0b\u65b9 class main\u4e2d \u4f60\u6703\u767c\u73fe\u4e0b\u9762\u7684\u5beb\u6cd5\u662f\u932f\u8aa4\u7684<\/p>\n\n\n
    public class<\/span> Main<\/span> <\/span>{\n    public static<\/span> void<\/span> main(String<\/span>[] args) {\n        int age;\n    }\n    public static<\/span> int year(int age){\n        this<\/span>.age = age\n        return<\/span> age+10<\/span>;\n    }\n}\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
    \u932f\u8aa41 \u2013 \u56e0\u70ba this \u53ea\u80fd\u7528\u5728\u975e\u975c\u614b\u65b9\u6cd5\u4e2d<\/p>\n\n\n\n
    \u800cstatic\u8868\u793a\u4e86\u975c\u614b<\/p>\n\n\n\n
    \u932f\u8aa42 \u2013 int age \u5ba3\u544a\u7684\u5730\u65b9 \u61c9\u8a72\u8981\u662f\u6240\u6709\u81ea\u8a02\u7fa9function\u7684\u6700\u5916\u5c64 \uff11\u4e0d\u662f\u5728\u5176\u4ed6function ( main )\u88e1\u9762<\/p>\n\n\n\n
    \u6b63\u78ba\u5beb\u6cd5<\/p>\n\n\n
    public class<\/span> Main<\/span> <\/span>{\n    int age; \/\/ \u56e0\u70baMain\u4e5f\u662f\u500b\u985e\u5225 \u6240\u4ee5\u8981\u5beb\u5728\u6240\u6709func\u7684\u6700\u5916\u9762<\/span>\n    \n    int year(int age){\n        this<\/span>.age = age;\n        return<\/span> this<\/span>.age+10<\/span>;\n    }\n    \n    public static<\/span> void<\/span> main(String<\/span>[] args) {\n        Main obj = new<\/span> Main(); \/\/ \u5275\u5efa\u7269\u4ef6<\/span>\n        obj.age = 20<\/span>;          \/\/ \u8a2d\u5b9a age<\/span>\n        System.out.println(\"Age after 10 years: \"<\/span> + obj.year(obj.age));\n    }\n}\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>","protected":false},"excerpt":{"rendered":"
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