{"id":2181,"date":"2025-03-01T18:12:51","date_gmt":"2025-03-01T10:12:51","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=2181"},"modified":"2025-03-01T18:12:51","modified_gmt":"2025-03-01T10:12:51","slug":"java-%e5%af%b9%e8%b1%a1%e5%92%8c%e7%b1%bb","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/01\/java-%e5%af%b9%e8%b1%a1%e5%92%8c%e7%b1%bb\/","title":{"rendered":"Java \u5bf9\u8c61\u548c\u7c7b"},"content":{"rendered":"\n<p>\u5728 Java \u4e2d\uff0c<strong>\u7c7b\uff08Class\uff09<\/strong>\u548c<strong>\u5bf9\u8c61\uff08Object\uff09<\/strong>\u662f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u6838\u5fc3\u6982\u5ff5\u3002\u5b83\u4eec\u662f Java \u7f16\u7a0b\u7684\u57fa\u7840\uff0c\u4e86\u89e3\u5b83\u4eec\u5982\u4f55\u5de5\u4f5c\u662f\u5b66\u4e60 Java \u7684\u91cd\u8981\u4e00\u6b65\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. <strong>\u7c7b\uff08Class\uff09<\/strong><\/h3>\n\n\n\n<p>\u7c7b\u662f\u5b9a\u4e49\u5bf9\u8c61\u7684\u84dd\u56fe\u6216\u6a21\u677f\uff0c\u5b83\u63cf\u8ff0\u4e86\u5bf9\u8c61\u7684\u72b6\u6001\u548c\u884c\u4e3a\u3002\u7c7b\u4e2d\u901a\u5e38\u5305\u542b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5b57\u6bb5\uff08Fields\uff09<\/strong>\uff1a\u7c7b\u7684\u5c5e\u6027\uff0c\u63cf\u8ff0\u5bf9\u8c61\u7684\u72b6\u6001\u3002<\/li>\n\n\n\n<li><strong>\u65b9\u6cd5\uff08Methods\uff09<\/strong>\uff1a\u7c7b\u7684\u884c\u4e3a\uff0c\u7528\u6765\u5b9a\u4e49\u5bf9\u8c61\u53ef\u4ee5\u6267\u884c\u7684\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u7c7b\u7684\u5b9a\u4e49\uff1a<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>public class Car {\n    \/\/ \u5b57\u6bb5\uff08\u5c5e\u6027\uff09\n    String model;\n    int year;\n\n    \/\/ \u6784\u9020\u51fd\u6570\uff08Constructor\uff09\n    public Car(String model, int year) {\n        this.model = model;\n        this.year = year;\n    }\n\n    \/\/ \u65b9\u6cd5\uff08\u884c\u4e3a\uff09\n    public void displayInfo() {\n        System.out.println(\"Model: \" + model + \", Year: \" + year);\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c<code>Car<\/code> \u7c7b\u6709\u4e24\u4e2a\u5b57\u6bb5\uff1a<code>model<\/code> \u548c <code>year<\/code>\uff0c\u4e00\u4e2a\u6784\u9020\u51fd\u6570\u548c\u4e00\u4e2a <code>displayInfo()<\/code> \u65b9\u6cd5\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6784\u9020\u51fd\u6570<\/strong>\uff1a\u6784\u9020\u51fd\u6570\u7528\u4e8e\u521d\u59cb\u5316\u5bf9\u8c61\u3002\u5728\u521b\u5efa\u5bf9\u8c61\u65f6\uff0c\u4f1a\u8c03\u7528\u6784\u9020\u51fd\u6570\u6765\u7ed9\u5bf9\u8c61\u7684\u5b57\u6bb5\u8d4b\u503c\u3002<\/li>\n\n\n\n<li><strong>\u65b9\u6cd5<\/strong>\uff1a<code>displayInfo()<\/code> \u662f\u4e00\u4e2a\u65b9\u6cd5\uff0c\u7528\u4e8e\u6253\u5370\u5bf9\u8c61\u7684\u4fe1\u606f\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. <strong>\u5bf9\u8c61\uff08Object\uff09<\/strong><\/h3>\n\n\n\n<p>\u5bf9\u8c61\u662f\u7c7b\u7684\u5b9e\u4f8b\u3002\u5b83\u662f\u901a\u8fc7\u7c7b\u521b\u5efa\u7684\u5177\u4f53\u5b9e\u4f53\uff0c\u5177\u6709\u7c7b\u5b9a\u4e49\u7684\u5c5e\u6027\u548c\u884c\u4e3a\u3002\u5bf9\u8c61\u53ef\u4ee5\u5b58\u50a8\u5728\u53d8\u91cf\u4e2d\uff0c\u5e76\u901a\u8fc7\u5bf9\u8c61\u8c03\u7528\u65b9\u6cd5\u548c\u8bbf\u95ee\u5b57\u6bb5\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u521b\u5efa\u5bf9\u8c61\uff1a<\/h4>\n\n\n\n<p>\u4f7f\u7528 <code>new<\/code> \u5173\u952e\u5b57\u6765\u521b\u5efa\u5bf9\u8c61\uff0c\u5e76\u901a\u8fc7\u6784\u9020\u51fd\u6570\u521d\u59cb\u5316\u5bf9\u8c61\u7684\u72b6\u6001\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class Main {\n    public static void main(String&#91;] args) {\n        \/\/ \u521b\u5efa\u4e00\u4e2a Car \u7c7b\u7684\u5bf9\u8c61\n        Car myCar = new Car(\"Toyota\", 2021);\n\n        \/\/ \u8c03\u7528\u5bf9\u8c61\u7684\u65b9\u6cd5\n        myCar.displayInfo();  \/\/ \u8f93\u51fa\uff1aModel: Toyota, Year: 2021\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>myCar<\/code> \u662f <code>Car<\/code> \u7c7b\u7684\u5bf9\u8c61\uff0c\u5b83\u88ab\u521b\u5efa\u5e76\u521d\u59cb\u5316\u4e3a <code>Toyota<\/code> \u6a21\u578b\uff0c2021 \u5e74\u3002<\/li>\n\n\n\n<li>\u901a\u8fc7 <code>myCar.displayInfo()<\/code>\uff0c\u8c03\u7528\u4e86 <code>Car<\/code> \u7c7b\u7684 <code>displayInfo()<\/code> \u65b9\u6cd5\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3. <strong>\u7c7b\u4e0e\u5bf9\u8c61\u7684\u5173\u7cfb<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u7c7b<\/strong>\u662f\u5bf9\u8c61\u7684\u84dd\u56fe\uff0c\u5b9a\u4e49\u4e86\u5bf9\u8c61\u7684\u72b6\u6001\u548c\u884c\u4e3a\u3002<\/li>\n\n\n\n<li><strong>\u5bf9\u8c61<\/strong>\u662f\u7c7b\u7684\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u662f\u7c7b\u5728\u5185\u5b58\u4e2d\u7684\u5177\u4f53\u8868\u73b0\u3002\u6bcf\u4e2a\u5bf9\u8c61\u90fd\u6709\u81ea\u5df1\u7684\u5c5e\u6027\uff08\u5b57\u6bb5\u503c\uff09\uff0c\u53ef\u4ee5\u8c03\u7528\u7c7b\u4e2d\u7684\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">4. <strong>\u6784\u9020\u51fd\u6570<\/strong><\/h3>\n\n\n\n<p>\u6784\u9020\u51fd\u6570\u662f\u7c7b\u7684\u4e00\u79cd\u7279\u6b8a\u65b9\u6cd5\uff0c\u7528\u4e8e\u521b\u5efa\u5bf9\u8c61\u65f6\u521d\u59cb\u5316\u5bf9\u8c61\u7684\u72b6\u6001\u3002\u6784\u9020\u51fd\u6570\u7684\u540d\u5b57\u4e0e\u7c7b\u7684\u540d\u5b57\u76f8\u540c\uff0c\u5e76\u4e14\u6ca1\u6709\u8fd4\u56de\u7c7b\u578b\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u6784\u9020\u51fd\u6570\u7684\u7279\u70b9\uff1a<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u9ed8\u8ba4\u6784\u9020\u51fd\u6570<\/strong>\uff1a\u5982\u679c\u6ca1\u6709\u5b9a\u4e49\u6784\u9020\u51fd\u6570\uff0cJava \u4f1a\u63d0\u4f9b\u4e00\u4e2a\u9ed8\u8ba4\u7684\u65e0\u53c2\u6784\u9020\u51fd\u6570\u3002<\/li>\n\n\n\n<li><strong>\u5e26\u53c2\u6570\u6784\u9020\u51fd\u6570<\/strong>\uff1a\u5982\u679c\u5b9a\u4e49\u4e86\u5e26\u53c2\u6570\u7684\u6784\u9020\u51fd\u6570\uff0c\u5c31\u9700\u8981\u4f7f\u7528\u8be5\u6784\u9020\u51fd\u6570\u6765\u521b\u5efa\u5bf9\u8c61\uff0c\u5e76\u4f20\u9012\u5fc5\u8981\u7684\u53c2\u6570\u3002<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u793a\u4f8b\uff1a\u5e26\u53c2\u6570\u7684\u6784\u9020\u51fd\u6570<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>public class Person {\n    String name;\n    int age;\n\n    \/\/ \u5e26\u53c2\u6570\u7684\u6784\u9020\u51fd\u6570\n    public Person(String name, int age) {\n        this.name = name;\n        this.age = age;\n    }\n\n    \/\/ \u65b9\u6cd5\n    public void displayInfo() {\n        System.out.println(\"Name: \" + name + \", Age: \" + age);\n    }\n\n    public static void main(String&#91;] args) {\n        Person person1 = new Person(\"John\", 30);\n        person1.displayInfo(); \/\/ \u8f93\u51fa\uff1aName: John, Age: 30\n    }\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">5. <strong>this \u5173\u952e\u5b57<\/strong><\/h3>\n\n\n\n<p>\u5728\u7c7b\u7684\u6784\u9020\u51fd\u6570\u548c\u65b9\u6cd5\u4e2d\uff0c<code>this<\/code> \u5173\u952e\u5b57\u7528\u4e8e\u5f15\u7528\u5f53\u524d\u5bf9\u8c61\u7684\u5b9e\u4f8b\u3002\u5b83\u5e38\u5e38\u7528\u4e8e\u533a\u5206\u7c7b\u7684\u5b57\u6bb5\u548c\u65b9\u6cd5\u7684\u53c2\u6570\u540d\u76f8\u540c\u7684\u60c5\u51b5\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public class Car {\n    String model;\n    int year;\n\n    \/\/ \u4f7f\u7528 this \u533a\u5206\u5b57\u6bb5\u548c\u53c2\u6570\n    public Car(String model, int year) {\n        this.model = model;\n        this.year = year;\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c<code>this.model<\/code> \u548c <code>this.year<\/code> \u6307\u4ee3\u5f53\u524d\u5bf9\u8c61\u7684\u5b57\u6bb5\uff0c\u800c <code>model<\/code> \u548c <code>year<\/code> \u662f\u6784\u9020\u51fd\u6570\u53c2\u6570\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">6. <strong>\u7c7b\u7684\u8bbf\u95ee\u4fee\u9970\u7b26<\/strong><\/h3>\n\n\n\n<p>\u7c7b\u53ef\u4ee5\u4f7f\u7528\u8bbf\u95ee\u4fee\u9970\u7b26\u6765\u63a7\u5236\u5176\u53ef\u89c1\u6027\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>public<\/strong>\uff1a\u7c7b\u662f\u516c\u5171\u7684\uff0c\u53ef\u4ee5\u88ab\u4efb\u4f55\u7c7b\u8bbf\u95ee\u3002<\/li>\n\n\n\n<li><strong>private<\/strong>\uff1a\u7c7b\u4e0d\u80fd\u88ab\u5916\u90e8\u8bbf\u95ee\uff08\u901a\u5e38\u7528\u4e8e\u5b57\u6bb5\u548c\u65b9\u6cd5\uff09\u3002<\/li>\n\n\n\n<li><strong>protected<\/strong>\uff1a\u7c7b\u53ef\u4ee5\u88ab\u540c\u4e00\u5305\u5185\u7684\u7c7b\u548c\u7ee7\u627f\u8be5\u7c7b\u7684\u5b50\u7c7b\u8bbf\u95ee\u3002<\/li>\n\n\n\n<li><strong>\u9ed8\u8ba4\uff08\u5305\u7ea7\u522b\u8bbf\u95ee\uff09<\/strong>\uff1a\u5982\u679c\u6ca1\u6709\u6307\u5b9a\u8bbf\u95ee\u4fee\u9970\u7b26\uff0c\u7c7b\u53ea\u80fd\u5728\u540c\u4e00\u5305\u5185\u8bbf\u95ee\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">7. <strong>\u9759\u6001\uff08Static\uff09\u6210\u5458<\/strong><\/h3>\n\n\n\n<p>\u5728 Java \u4e2d\uff0c\u9759\u6001\u53d8\u91cf\u548c\u9759\u6001\u65b9\u6cd5\u5c5e\u4e8e\u7c7b\u800c\u4e0d\u662f\u5b9e\u4f8b\u5316\u7684\u5bf9\u8c61\u3002\u9759\u6001\u6210\u5458\u53ef\u4ee5\u76f4\u63a5\u901a\u8fc7\u7c7b\u540d\u6765\u8bbf\u95ee\uff0c\u800c\u4e0d\u9700\u8981\u521b\u5efa\u7c7b\u7684\u5bf9\u8c61\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u9759\u6001\u53d8\u91cf\u548c\u65b9\u6cd5\u7684\u4f8b\u5b50\uff1a<\/h4>\n\n\n\n<pre class=\"wp-block-code\"><code>public class Counter {\n    \/\/ \u9759\u6001\u53d8\u91cf\n    static int count = 0;\n\n    \/\/ \u9759\u6001\u65b9\u6cd5\n    public static void increment() {\n        count++;\n    }\n\n    public static void main(String&#91;] args) {\n        Counter.increment();\n        System.out.println(\"Count: \" + Counter.count); \/\/ \u8f93\u51fa\uff1aCount: 1\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c<code>count<\/code> \u662f\u9759\u6001\u53d8\u91cf\uff0c<code>increment()<\/code> \u662f\u9759\u6001\u65b9\u6cd5\u3002\u4f60\u53ef\u4ee5\u76f4\u63a5\u901a\u8fc7\u7c7b\u540d <code>Counter<\/code> \u8bbf\u95ee\u5b83\u4eec\uff0c\u800c\u65e0\u9700\u521b\u5efa\u5bf9\u8c61\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">8. <strong>\u5b9e\u4f8b\u5316\u4e0e\u521d\u59cb\u5316<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5b9e\u4f8b\u5316<\/strong>\uff1a\u901a\u8fc7 <code>new<\/code> \u5173\u952e\u5b57\u521b\u5efa\u7c7b\u7684\u5bf9\u8c61\u3002<\/li>\n\n\n\n<li><strong>\u521d\u59cb\u5316<\/strong>\uff1a\u901a\u8fc7\u6784\u9020\u51fd\u6570\u4e3a\u5bf9\u8c61\u7684\u5b57\u6bb5\u8d4b\u503c\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">9. <strong>\u603b\u7ed3<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u7c7b<\/strong>\uff1a\u7c7b\u662f\u5bf9\u8c61\u7684\u6a21\u677f\uff0c\u5b9a\u4e49\u4e86\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u884c\u4e3a\u3002<\/li>\n\n\n\n<li><strong>\u5bf9\u8c61<\/strong>\uff1a\u5bf9\u8c61\u662f\u7c7b\u7684\u5b9e\u4f8b\uff0c\u6bcf\u4e2a\u5bf9\u8c61\u90fd\u6709\u81ea\u5df1\u7684\u5c5e\u6027\u548c\u884c\u4e3a\u3002<\/li>\n\n\n\n<li><strong>\u6784\u9020\u51fd\u6570<\/strong>\uff1a\u6784\u9020\u51fd\u6570\u7528\u4e8e\u521d\u59cb\u5316\u5bf9\u8c61\u7684\u72b6\u6001\u3002<\/li>\n\n\n\n<li><strong>\u9759\u6001\u6210\u5458<\/strong>\uff1a\u9759\u6001\u53d8\u91cf\u548c\u65b9\u6cd5\u5c5e\u4e8e\u7c7b\uff0c\u4e0d\u4f9d\u8d56\u4e8e\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n\n\n\n<p>\u7c7b\u548c\u5bf9\u8c61\u662f Java \u7f16\u7a0b\u7684\u6838\u5fc3\u6982\u5ff5\uff0c\u7406\u89e3\u4e86\u5b83\u4eec\uff0c\u4f60\u5c31\u80fd\u7f16\u5199\u9762\u5411\u5bf9\u8c61\u7684\u7a0b\u5e8f\u4e86\u3002\u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Java \u4e2d\uff0c\u7c7b\uff08Class\uff09\u548c\u5bf9\u8c61\uff08Object\uff09\u662f\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u7684\u6838\u5fc3\u6982\u5ff5\u3002\u5b83\u4eec\u662f Java \u7f16\u7a0b\u7684\u57fa\u7840 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[68],"tags":[],"class_list":["post-2181","post","type-post","status-publish","format-standard","hentry","category-java"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2181","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=2181"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2181\/revisions"}],"predecessor-version":[{"id":2182,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2181\/revisions\/2182"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=2181"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=2181"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=2181"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}