{"id":214,"date":"2025-12-23T14:36:25","date_gmt":"2025-12-23T14:36:25","guid":{"rendered":"https:\/\/hyc.eshachem.com\/program\/?p=214"},"modified":"2025-12-23T14:41:16","modified_gmt":"2025-12-23T14:41:16","slug":"%e5%91%bc%e5%8f%ab%e8%88%87%e5%bb%ba%e6%a7%8b%e5%ad%90","status":"publish","type":"post","link":"https:\/\/hyc.eshachem.com\/program\/%e5%91%bc%e5%8f%ab%e8%88%87%e5%bb%ba%e6%a7%8b%e5%ad%90\/","title":{"rendered":"JAVA – \u547c\u53eb\u8207\u5efa\u69cb\u5b50"},"content":{"rendered":"\n

\u975c\u614b\u8207\u975e\u975c\u614b\u547c\u53eb<\/h1>\n\n\n\n
\"\"<\/figure>\n\n\n\n

static \/ instance<\/h2>\n\n\n\n

static\u8868\u793a\u975c\u614b\u7684<\/p>\n\n\n\n

(\u6211\u89ba\u5f97\u9019\u500b\u7ffb\u8b6f\u6709\u9ede\u721b\uff0c\u4f46\u597d\u50cf\u4e5f\u627e\u4e0d\u5230\u66f4\u597d\u7684\u8aaa\u6cd5\u4e86)<\/s><\/p>\n\n\n\n

\u7c21\u55ae\u4f86\u8aaa\u5c31\u662f\u53ef\u4ee5\u76f4\u63a5 \u985e\u5225\u540d\u7a31.\u65b9\u6cd5<\/code><\/strong> \u4f86\u547c\u53eb<\/p>\n\n\n\n

\n

\u82e5\u6c92\u5beb static \u8868 \u201c \u5be6\u4f8b\u51fd\u6578 instance<\/strong> \u201d (\u53c8\u7a31\u975e\u975c\u614b\u65b9\u6cd5 , \u5be6\u4f8b\u65b9\u6cd5)\u800c\u5be6\u4f8b\u51fd\u6578 \u9700\u8981\u5148\u5efa\u7acb\u7269\u4ef6<\/strong>\u624d\u80fd\u547c\u53eb<\/p>\n<\/blockquote>\n\n\n\n

\n\n\n\n

\u8aaa\u4f8b<\/h2>\n\n\n
\t\npublic<\/span> class<\/span> MyMath<\/span> <\/span>{ \/\/ \u5b9a\u7fa9\u4e00\u500b\u516c\u5171\u985e\u5225<\/span>\n\n    static<\/span> int mul(int x, int y) {return<\/span> x*y; }\n\n    int div (int x, int y) { return<\/span> x\/y; }\n\n}\n<\/code><\/span>Code language:<\/span> PHP<\/span> (<\/span>php<\/span>)<\/span><\/small><\/pre>\n\n\n
\u547c\u53eb mul<\/p>\n\n\n
int product = MyMath.mul(12, 12);\n<\/code><\/span><\/pre>\n\n\n
\u547c\u53eb div<\/p>\n\n\n
MyMath mMath = new<\/span> MyMath(); \n\nint quo = mMath.div(12<\/span>, 12<\/span>);\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
\u50b3\u503c\u547c\u53eb \u8207 \u53c3\u8003\u547c\u53eb<\/h1>\n\n\n\n
\n
\u50b3\u503c\u547c\u53eb<\/strong> \u5c31\u662f\u76f4\u63a5\u50b3 int double \u7b49\u57fa\u672c\u6578\u64da\u578b\u614b \uff0c\u82e5\u662f\u50b3\u5176\u4ed6\u7684\u5982\u7269\u4ef6\u6216list\u7b49 \u5247\u53c3\u8003\u547c\u53eb<\/strong><\/p>\n<\/blockquote>\n\n\n\n
\u5be6 \/ \u865b\u53c3\u6578<\/h1>\n\n\n\n
\u53c3\u6578 \u53c8\u7a31\u5f15\u6578<\/p>\n\n\n\n
\u5728java \u4e2d \u5f15\u6578\u5206\u70ba \u5be6\u5f15\u6578<\/strong>\u8207\u865b\u5f15\u6578<\/strong><\/p>\n\n\n\n
\n
\u5beb\u5728\u81ea\u8a02\u7fa9\u65b9\u6cd5\u90a3\u7684 \u53eb \u865b\u5f15\u6578<\/p>\n<\/blockquote>\n\n\n
public class<\/span> Main<\/span> <\/span>{\n    public static<\/span> void<\/span> display(int number) { \/\/ \u865b\u5f15\u6578<\/span>\n        System.out.println(\"\u63a5\u6536\u5230\u7684\u6578\u503c: \"<\/span> + number);\n    }\n\n    public static<\/span> void<\/span> main(String<\/span>[] args) {\n        int x = 10<\/span>;\n        display(x); \/\/ \u5be6\u5f15\u6578\u70ba x<\/span>\n    }\n}\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n
public static<\/span> void<\/span> callAdd( ) {\n\n    int anum = 100<\/span>;\n\n    for<\/span> (int cnt = 0<\/span>; cnt < 100<\/span>; cnt++) { add(anum); }\n\n    System.out.println(anum);   \/\/ \u8f38\u51fa<\/span>\n\n}\n\npublic static<\/span> void<\/span> add(int anum) { anum++;\/\/\u6539\u8b8a\u7684\u662f\u865b\u5f15\u6578\u7684anum }<\/span>\n\n\/\/\u8f38\u51fa100<\/span>\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
\u7d50\u8ad6<\/h1>\n\n\n\n
\n
\u5728\u300c\u50b3\u503c\u547c\u53eb<\/strong>\u300d\u4e2d,\u300c\u5be6\u5f15\u6578\u300d\u8207\u300c\u865b\u5f15\u6578\u300d\u4e8c\u8005\u5360\u4e0d\u540c<\/strong> \u8a18\u61b6\u9ad4\u4f4d\u7f6e<\/p>\n<\/blockquote>\n\n\n\n
\n
\u5728\u300c\u53c3\u8003\u547c\u53eb<\/strong>\u300d\u4e2d,\u300c\u5be6\u5f15\u6578\u300d\u8207\u300c\u865b\u5f15\u6578\u300d\u4e8c\u8005\u5360\u76f8\u540c<\/strong> \u8a18\u61b6\u9ad4\u4f4d\u7f6e<\/p>\n<\/blockquote>\n\n\n\n
private \u8207 public<\/h1>\n\n\n\n
\"\"<\/figure>\n\n\n\n
private<\/code><\/strong><\/th>\u53ea\u80fd\u5728\u8a72\u985e\u5225\u5167\u4f7f\u7528\uff0c\u5916\u90e8\u7121\u6cd5\u5b58\u53d6\u3002<\/th><\/tr><\/thead>
public<\/code><\/strong><\/td>\u53ef\u4ee5\u5f9e \u4efb\u4f55\u5730\u65b9<\/strong> \u5b58\u53d6\uff0c\u5305\u62ec\u4e0d\u540c\u7684\u985e\u5225\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\n
\u5916\u90e8\u985e\u5225\u900f\u904eget, set\u65b9\u6cd5\u4f86\u5b58\u53d6\u8cc7\u6599<\/p>\n<\/blockquote>\n\n\n\n
\u7bc4\u4f8b<\/h2>\n\n\n\n
Person.java<\/code><\/strong><\/p>\n\n\n
public class<\/span> Person<\/span> <\/span>{\n    private String<\/span> name;  \/\/ \u79c1\u6709\u8b8a\u6578\uff0c\u50c5\u80fd\u5728 Person \u985e\u5225\u5167\u90e8\u5b58\u53d6<\/span>\n\n    \/\/ \u63d0\u4f9b\u516c\u958b\u7684\u65b9\u5f0f\u8b93\u5916\u90e8\u53ef\u4ee5\u5b89\u5168\u5730\u5b58\u53d6 private \u6210\u54e1<\/span>\n    public String<\/span> getName() {\n        return<\/span> name;\n    }\n\n    public void<\/span> setName(String<\/span> name) {\n        this<\/span>.name = name;\n    }\n}\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
App.java<\/code><\/strong><\/p>\n\n\n
public class<\/span> App<\/span> <\/span>{\n    public static<\/span> void<\/span> main(String<\/span>[] args) {\n        Person person = new<\/span> Person();  \/\/ \u5275\u5efa Person \u985e\u5225\u7684\u7269\u4ef6<\/span>\n        \/\/ person.name = \"John\"; \/\/ \u932f\u8aa4\uff01\u7121\u6cd5\u76f4\u63a5\u5b58\u53d6 private \u6210\u54e1<\/span>\n        person.setName(\"John\"<\/span>);  \/\/ \u6b63\u78ba\uff01\u900f\u904e public \u65b9\u6cd5\u4fee\u6539\u503c<\/span>\n        System.out.println(person.getName()); \/\/ \u6b63\u78ba\uff01\u900f\u904e public \u65b9\u6cd5\u8b80\u53d6\u503c<\/span>\n    }\n}\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
\u5728\u985e\u5225\u4e2d\u5b9a\u7fa9\u5efa\u69cb\u5f0f\u4e0d\u7528void,\u76f4\u63a5 public Class() { A=x ; B=y }<\/p>\n\n\n\n
\u5efa\u69cb\u5f0f Constructor<\/h1>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\n
\u985e\u5225\u4e2d\u7684\u4e00\u7a2e\u7279\u6b8a\u65b9\u6cd5\uff0c\u7528\u65bc\u521d\u59cb\u5316\u7269\u4ef6\u3002\u5efa\u69cb\u5f0f\u7684\u540d\u7a31\u5fc5\u9808\u8207\u985e\u5225\u540d\u7a31\u76f8\u540c\uff0c\u4e14\u6c92\u6709\u56de\u50b3\u578b\u5225<\/p>\n<\/blockquote>\n\n\n\n
\u6240\u4ee5\u5728\u7269\u4ef6\u57fa\u790e\u8a8d\u8b58\u90a3\u7bc7\u6211\u5011\u6709\u8aaa\u5230<\/p>\n\n\n\n
\u900f\u904e\u5efa\u69cb\u5f0f\u5275\u5efa\u7269\u4ef6<\/strong>\u7684\u8a9e\u6cd5\u5982\u4e0b<\/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
\u4e4b\u5f8c\u6211\u5011\u8981\u8ce6\u4e88\u6211\u5011\u985e\u5225\u5167\u7684\u5c6c\u6027\u65b9\u6cd5\u90fd\u8981\u7528\u4ee5\u4e0b\u5beb\u6cd5<\/p>\n\n\n
myDog.name = \"Harry\"<\/span>; \/\/ \u8a2d\u5b9a\u5c6c\u6027\u521d\u503c<\/span>\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
\u53ef\u662f\u9019\u6a23\u6703\u964d\u4f4e\u7a0b\u5f0f\u7684\u53ef\u8b80\u6027<\/p>\n\n\n\n
\u6240\u4ee5\u6211\u5011\u53ef\u4ee5\u76f4\u63a5\u5728 class \u4e2d \u201c \u5b9a\u7fa9\u5efa\u69cb\u5f0f \u201d<\/p>\n\n\n\n
\u8a9e\u6cd5\u5982\u4e0b<\/p>\n\n\n
class<\/span> Rectangle<\/span> <\/span>{\n    double width;\n    double len;\n\n    \/\/ \u81ea\u5b9a\u7fa9\u5efa\u69cb\u5f0f<\/span>\n    public Rectangle(double width, double len) {\n        this<\/span>.width = width;\n        this<\/span>.len = len;\n    }\n}\n\npublic class<\/span> Main<\/span> <\/span>{\n    public static<\/span> void<\/span> main(String<\/span>[] args) {\n        \/\/ \u4f7f\u7528\u5efa\u69cb\u5f0f\u521d\u59cb\u5316\u5c6c\u6027<\/span>\n        Rectangle r = new<\/span> Rectangle(5.0<\/span>, 10.0<\/span>);\/\/ \u76f4\u63a5\u5beb\u5165\u521d\u503c<\/span>\n        System.out.println(\"\u5bec\u5ea6: \"<\/span> + r.width + \", \u9577\u5ea6: \"<\/span> + r.len);\n    }\n}\n\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
\u5982\u679c\u6c92\u6709\u5148\u5b9a\u7fa9\u5efa\u69cb\u5f0f\u5247\u8981\u5beb\u6210\u9019\u6a23<\/p>\n\n\n
class<\/span> Rectangle<\/span> <\/span>{\n    double width;\n    double len;\n}\n\npublic class<\/span> Main<\/span> <\/span>{\n    public static<\/span> void<\/span> main(String<\/span>[] args) {\n        Rectangle r = new<\/span> Rectangle();\n        r.width = 5.0<\/span>;  \/\/ \u5fc5\u9808\u624b\u52d5\u8a2d\u5b9a\u5c6c\u6027<\/span>\n        r.len = 10.0<\/span>;\n        System.out.println(\"\u5bec\u5ea6: \"<\/span> + r.width + \", \u9577\u5ea6: \"<\/span> + r.len);\n    }\n}\n\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>","protected":false},"excerpt":{"rendered":"
\u975c\u614b\u8207\u975e\u975c\u614b\u547c\u53eb static \/ instance static\u8868\u793a\u975c\u614b\u7684 (\u6211\u89ba\u5f97\u9019\u500b\u7ffb\u8b6f\u6709\u9ede\u721b\uff0c\u4f46\u597d\u50cf\u4e5f\u627e\u4e0d\u5230\u66f4\u597d\u7684\u8aaa\u6cd5\u4e86) \u7c21\u55ae\u4f86\u8aaa\u5c31\u662f\u53ef\u4ee5\u76f4\u63a5 \u985e\u5225\u540d\u7a31.\u65b9\u6cd5 \u4f86\u547c\u53eb \u82e5\u6c92\u5beb static \u8868 \u201c \u5be6\u4f8b\u51fd\u6578 instance \u201d (\u53c8\u7a31\u975e\u975c\u614b\u65b9\u6cd5 , \u5be6\u4f8b\u65b9\u6cd5)\u800c\u5be6\u4f8b\u51fd\u6578 \u9700\u8981\u5148\u5efa\u7acb\u7269\u4ef6\u624d\u80fd\u547c\u53eb \u8aaa\u4f8b \u547c\u53eb mul \u547c\u53eb div \u50b3\u503c\u547c\u53eb \u8207 \u53c3\u8003\u547c\u53eb \u50b3\u503c\u547c\u53eb \u5c31\u662f\u76f4\u63a5\u50b3 int double \u7b49\u57fa\u672c\u6578\u64da\u578b\u614b \uff0c\u82e5\u662f\u50b3\u5176\u4ed6\u7684\u5982\u7269\u4ef6\u6216list\u7b49 \u5247\u53c3\u8003\u547c\u53eb \u5be6 \/ \u865b\u53c3\u6578 \u53c3\u6578 \u53c8\u7a31\u5f15\u6578 \u5728java \u4e2d \u5f15\u6578\u5206\u70ba \u5be6\u5f15\u6578\u8207\u865b\u5f15\u6578 \u5beb\u5728\u81ea\u8a02\u7fa9\u65b9\u6cd5\u90a3\u7684 \u53eb \u865b\u5f15\u6578 \u7d50\u8ad6 \u5728\u300c\u50b3\u503c\u547c\u53eb\u300d\u4e2d,\u300c\u5be6\u5f15\u6578\u300d\u8207\u300c\u865b\u5f15\u6578\u300d\u4e8c\u8005\u5360\u4e0d\u540c \u8a18\u61b6\u9ad4\u4f4d\u7f6e \u5728\u300c\u53c3\u8003\u547c\u53eb\u300d\u4e2d,\u300c\u5be6\u5f15\u6578\u300d\u8207\u300c\u865b\u5f15\u6578\u300d\u4e8c\u8005\u5360\u76f8\u540c \u8a18\u61b6\u9ad4\u4f4d\u7f6e private \u8207 public […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[19],"tags":[],"class_list":["post-214","post","type-post","status-publish","format-standard","hentry","category-java"],"views":6,"_links":{"self":[{"href":"https:\/\/hyc.eshachem.com\/program\/wp-json\/wp\/v2\/posts\/214","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hyc.eshachem.com\/program\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hyc.eshachem.com\/program\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hyc.eshachem.com\/program\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/hyc.eshachem.com\/program\/wp-json\/wp\/v2\/comments?post=214"}],"version-history":[{"count":2,"href":"https:\/\/hyc.eshachem.com\/program\/wp-json\/wp\/v2\/posts\/214\/revisions"}],"predecessor-version":[{"id":222,"href":"https:\/\/hyc.eshachem.com\/program\/wp-json\/wp\/v2\/posts\/214\/revisions\/222"}],"wp:attachment":[{"href":"https:\/\/hyc.eshachem.com\/program\/wp-json\/wp\/v2\/media?parent=214"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hyc.eshachem.com\/program\/wp-json\/wp\/v2\/categories?post=214"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hyc.eshachem.com\/program\/wp-json\/wp\/v2\/tags?post=214"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}