{"id":2030,"date":"2026-07-28T06:16:01","date_gmt":"2026-07-28T06:16:01","guid":{"rendered":"https:\/\/www.vpascode.com\/cn\/docs\/uncategorized\/java-visualizer-guide\/"},"modified":"2026-07-28T06:16:01","modified_gmt":"2026-07-28T06:16:01","slug":"java-visualizer-guide","status":"publish","type":"ld_docs","link":"https:\/\/www.vpascode.com\/cn\/docs\/vpascode-docs\/java-visualizer-guide\/","title":{"rendered":"Java"},"content":{"rendered":"

\u5728\u8bbe\u8ba1\u9762\u5411\u5bf9\u8c61\u5e94\u7528\u7a0b\u5e8f\u3001\u7ba1\u7406\u7ee7\u627f\u5c42\u6b21\u7ed3\u6784\u6216\u8fdb\u884c\u4ee3\u7801\u5ba1\u67e5\u65f6\uff0c\u9605\u8bfb\u539f\u59cb\u7684Java\u6e90\u4ee3\u7801\u53ef\u80fd\u4f1a\u4f7f\u53ef\u89c6\u5316\u7c7b\u5173\u7cfb\u53d8\u5f97\u56f0\u96be\u3002\u8be5Java\u53ef\u89c6\u5316\u5de5\u5177<\/strong>\u5c06Java\u7c7b\u5b9a\u4e49\u3001\u62bd\u8c61\u7c7b\u548c\u63a5\u53e3\u8f6c\u6362\u4e3a\u6e05\u6670\u3001\u53ef\u4ea4\u4e92\u7684\u7c7b\u56fe\u3002\u901a\u8fc7\u89e3\u6790\u7c7b\u7ed3\u6784\u3001\u6210\u5458\u53ef\u89c1\u6027\u3001\u7ee7\u627f\uff08extends<\/code>\uff09\uff0c\u4ee5\u53ca\u63a5\u53e3\u5b9e\u73b0\uff08implements<\/code>\uff09\uff0c\u5f00\u53d1\u4eba\u5458\u548c\u8f6f\u4ef6\u67b6\u6784\u5e08\u53ef\u4ee5\u7acb\u5373\u5ba1\u67e5\u5e94\u7528\u7a0b\u5e8f\u67b6\u6784\u548c\u9762\u5411\u5bf9\u8c61\u8bbe\u8ba1\u3002<\/p>\n

Java\u53ef\u89c6\u5316\u7684\u5de5\u4f5c\u539f\u7406<\/h2>\n

\u5728VPasCode\u4e2d\uff0cJava\u6e32\u67d3\u4f1a\u81ea\u52a8\u5c06\u63a5\u53e3\u3001\u62bd\u8c61\u7c7b\u3001\u5b57\u6bb5\u3001\u65b9\u6cd5\u548c\u5173\u7cfb\u5173\u952e\u5b57\u89e3\u6790\u4e3a\u7ed3\u6784\u5316\u7684UML\u98ce\u683c\u7c7b\u56fe\u3002\u7c7b\u4f5c\u4e3a\u4e3b\u8981\u5b9e\u4f53\u5361\u7247\uff0c\u53ef\u89c1\u6027\u4fee\u9970\u7b26\uff08public<\/code>, protected<\/code>, private<\/code>\uff09\u663e\u793a\u4e3a\u5c5e\u6027\u7b26\u53f7\uff0c\u800c\u7ee7\u627f\u6216\u63a5\u53e3\u5b9e\u73b0\u5173\u952e\u5b57\u4f1a\u81ea\u52a8\u5728\u7c7b\u8282\u70b9\u4e4b\u95f4\u751f\u6210\u5173\u7cfb\u8fde\u63a5\u5668\u3002<\/p>\n

1. \u57fa\u7840\u8bbe\u7f6e<\/h3>\n

\u8981\u53ef\u89c6\u5316\u6807\u51c6\u7684Java\u7c7b\u5c42\u6b21\u7ed3\u6784\uff0c\u9700\u5b9a\u4e49\u63a5\u53e3\u3001\u62bd\u8c61\u7c7b\u548c\u5177\u4f53\u5b50\u7c7b\u3002\u50cf\u52a8\u7269\u6a21\u578b\u8fd9\u6837\u7684\u6807\u51c6\u5bf9\u8c61\u5c42\u6b21\u7ed3\u6784\u5c55\u793a\u4e86\u57fa\u672c\u7684\u7c7b\u5173\u7cfb\uff1a<\/p>\n

\n
\nJava<\/span>
\n
\n<\/path><\/path><\/svg>
\n\u5728VPasCode\u4e2d\u7f16\u8f91Java<\/span>
\n<\/a>\n<\/div>\n
\n
\r\n
\r\n Java<\/span>\r\n \r\n <\/path><\/path><\/svg>\r\n Edit Java in VPasCode<\/span>\r\n <\/a>\r\n <\/div>\r\n
\r\n 
\/\/ Java\u52a8\u7269\u5c42\u6b21\u7ed3\u6784\u793a\u4f8b\r\npublic interface Playable {\r\n    void play();\r\n}\r\n\r\npublic interface Comparable {\r\n    int compareTo(Object other);\r\n}\r\n\r\npublic abstract class Animal implements Comparable {\r\n    protected String name;\r\n    private int age;\r\n\r\n    public Animal(String name, int age) {\r\n        this.name = name;\r\n        this.age = age;\r\n    }\r\n\r\n    public abstract void makeSound();\r\n\r\n    public String getInfo() {\r\n        return name + \" \u662f \" + age + \" \u5c81\";\r\n    }\r\n\r\n    public int compareTo(Object other) {\r\n        Animal a = (Animal) other;\r\n        return this.name.compareTo(a.name);\r\n    }\r\n}\r\n\r\npublic class Dog extends Animal implements Playable {\r\n    private String breed;\r\n    static String species = \"\u72ac\u79d1\";\r\n\r\n    public Dog(String name, int age, String breed) {\r\n        super(name, age);\r\n        this.breed = breed;\r\n    }\r\n\r\n    public void makeSound() {\r\n        System.out.println(\"\u6c6a\u6c6a\uff01\");\r\n    }\r\n\r\n    public void play() {\r\n        System.out.println(name + \" \u6b63\u5728\u73a9\u6361\u7403\u6e38\u620f\");\r\n    }\r\n}\r\n\r\npublic class Cat extends Animal {\r\n    private String furColor;\r\n\r\n    public Cat(String name, int age, String furColor) {\r\n        super(name, age);\r\n        this.furColor = furColor;\r\n    }\r\n\r\n    public void makeSound() {\r\n        System.out.println(\"\u55b5\u55b5\uff01\");\r\n    }\r\n}<\/code><\/pre>                <\/div>\r\n                
\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit Java in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n
\n
\n<\/path><\/path><\/svg>
\n\u5728VPasCode\u4e2d\u7f16\u8f91Java<\/span>
\n<\/a>\n<\/div>\n<\/div>\n
\"\"<\/p>\n
\u00a0<\/p>\n
\u9ad8\u7ea7\u7ed3\u6784\u6280\u672f<\/h2>\n
Java\u53ef\u89c6\u5316\u5728\u5c55\u793a\u9886\u57df\u6a21\u578b\u3001\u4f01\u4e1a\u670d\u52a1\u5c42\u4ee5\u53ca\u4ed3\u5e93\u548c\u5de5\u5382\u7b49\u8bbe\u8ba1\u6a21\u5f0f\u65b9\u9762\u8868\u73b0\u51fa\u8272\u3002<\/p>\n
1. \u7535\u5b50\u5546\u52a1\u9886\u57df\u6a21\u578b\u5c42\u6b21\u7ed3\u6784<\/h3>\n
\u901a\u8fc7\u58f0\u660e\u8ba2\u5355\u63a5\u53e3\u3001\u62bd\u8c61\u652f\u4ed8\u5904\u7406\u7a0b\u5e8f\u548c\u5177\u4f53\u7684\u7ed3\u8d26\u5b9e\u73b0\uff0cVPasCode\u5c06\u590d\u6742\u7684\u4f01\u4e8b\u4e1a\u9886\u57df\u6a21\u578b\u6620\u5c04\u4e3a\u6e05\u6670\u7684\u7c7b\u8282\u70b9\uff1a<\/p>\n
\n
\nJava<\/span>
\n
\n<\/path><\/path><\/svg>
\n\u5728VPasCode\u4e2d\u7f16\u8f91Java<\/span>
\n<\/a>\n<\/div>\n
\n            
\r\n                                
\r\n                    Java<\/span>\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit Java in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                
\r\n                    
public interface PaymentProcessor {\r\n    boolean processPayment(double amount);\r\n}\r\n\r\npublic abstract class Order {\r\n    private String orderId;\r\n    protected double totalAmount;\r\n\r\n    public Order(String orderId, double totalAmount) {\r\n        this.orderId = orderId;\r\n        this.totalAmount = totalAmount;\r\n    }\r\n\r\n    public abstract void fulfill();\r\n}\r\n\r\npublic class CreditCardOrder extends Order implements PaymentProcessor {\r\n    private String cardNumber;\r\n\r\n    public CreditCardOrder(String orderId, double totalAmount, String cardNumber) {\r\n        super(orderId, totalAmount);\r\n        this.cardNumber = cardNumber;\r\n    }\r\n\r\n    public boolean processPayment(double amount) {\r\n        return true;\r\n    }\r\n\r\n    public void fulfill() {\r\n        System.out.println(\"\u8ba2\u5355 \" + orderId + \" \u5df2\u901a\u8fc7\u4fe1\u7528\u5361\u5b8c\u6210\u3002\");\r\n    }\r\n}<\/code><\/pre>                <\/div>\r\n                
\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit Java in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n
\n
\n<\/path><\/path><\/svg>
\n\u5728VPasCode\u4e2d\u7f16\u8f91Java<\/span>
\n<\/a>\n<\/div>\n<\/div>\n
\"\"<\/p>\n
\u00a0<\/p>\n
\u6784\u5efa\u4f01\u4e1a\u7ea7\u6570\u636e\u6a21\u578b\u548c\u4ed3\u5e93<\/h2>\n
\u53ef\u89c6\u5316\u6570\u636e\u8bbf\u95ee\u5c42\u548c\u5b9e\u4f53\u5173\u7cfb\u6709\u52a9\u4e8e\u540e\u7aef\u56e2\u961f\u9a8c\u8bc1\u5bf9\u8c61-\u5173\u7cfb\u6620\u5c04\uff08ORM\uff09\u7ed3\u6784\u548c\u63a5\u53e3\u62bd\u8c61\u5c42\u3002<\/p>\n
1. \u7528\u6237\u7ba1\u7406\u4e0e\u4ed3\u5e93\u5c42<\/h3>\n
\u7ec4\u7ec7\u5b9e\u4f53\u3001\u6570\u636e\u4f20\u8f93\u5bf9\u8c61\uff08DTOs\uff09\u548c\u670d\u52a1\u63a5\u53e3\uff0c\u4ee5\u53ef\u89c6\u5316\u6e05\u6670\u7684\u5173\u6ce8\u70b9\u5206\u79bb\uff1a<\/p>\n
\n
\nJava<\/span>
\n
\n<\/path><\/path><\/svg>
\n\u5728 VPasCode \u4e2d\u7f16\u8f91 Java<\/span>
\n<\/a>\n<\/div>\n
\n            
\r\n                                
\r\n                    Java<\/span>\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit Java in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n                                
\r\n                    
public interface UserRepository {\r\n    User findById(String id);\r\n    void save(User user);\r\n}\r\n\r\npublic class User {\r\n    private String id;\r\n    private String username;\r\n    private String email;\r\n\r\n    public User(String id, String username, String email) {\r\n        this.id = id;\r\n        this.username = username;\r\n        this.email = email;\r\n    }\r\n\r\n    public String getUsername() {\r\n        return username;\r\n    }\r\n}\r\n\r\npublic class UserServiceImpl implements UserRepository {\r\n    public User findById(String id) {\r\n        return new User(id, \"johndoe\", \"john@example.com\");\r\n    }\r\n\r\n    public void save(User user) {\r\n        System.out.println(\"Saving user: \" + user.getUsername());\r\n    }\r\n}<\/code><\/pre>                <\/div>\r\n                
\r\n                    \r\n                        <\/path><\/path><\/svg>\r\n                        Edit Java in VPasCode<\/span>\r\n                    <\/a>\r\n                <\/div>\r\n            <\/div>\r\n            \n<\/p><\/div>\n
\n
\n<\/path><\/path><\/svg>
\n\u5728 VPasCode \u4e2d\u7f16\u8f91 Java<\/span>
\n<\/a>\n<\/div>\n<\/div>\n
\"\"<\/p>\n
\u00a0<\/p>\n
\u6218\u7565\u6700\u4f73\u5b9e\u8df5<\/h2>\n
    \n
  • \u58f0\u660e\u660e\u786e\u7684\u8bbf\u95ee\u4fee\u9970\u7b26\uff1a<\/strong> \u59cb\u7ec8\u6307\u5b9a public<\/code>, protected<\/code>\uff0c\u6216 private<\/code>\u4ee5\u4fbf\u7c7b\u56fe\u80fd\u6e05\u6670\u663e\u793a\u6210\u5458\u7684\u53ef\u89c1\u6027\u3002<\/li>\n
  • \u4f7f\u7528\u63a5\u53e3\u5b9a\u4e49\u884c\u4e3a\u5951\u7ea6\uff1a<\/strong> \u5c06\u884c\u4e3a\u5951\u7ea6\u5206\u4e3a interface<\/code> \u5b9a\u4e49\uff0c\u5e76\u4f7f\u7528 implements<\/code>\u4ee5\u4fdd\u6301\u89c6\u89c9\u5173\u7cfb\u7684\u89e3\u8026\u3002<\/li>\n
  • \u4fdd\u6301\u62bd\u8c61\u7c7b\u8fb9\u754c\u6e05\u6670\uff1a<\/strong> \u4f7f\u7528 abstract class<\/code>\u7528\u4e8e\u5171\u4eab\u72b6\u6001\u548c\u57fa\u7840\u5b9e\u73b0\uff0c\u4ee5\u751f\u6210\u6e05\u6670\u7684\u5c42\u6b21\u7c7b\u6811\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
    \u5728\u8bbe\u8ba1\u9762\u5411\u5bf9\u8c61\u5e94\u7528\u7a0b\u5e8f\u3001\u7ba1\u7406\u7ee7\u627f\u5c42\u6b21\u7ed3\u6784\u6216\u8fdb\u884c\u4ee3\u7801\u5ba1\u67e5\u65f6\uff0c\u9605\u8bfb\u539f\u59cb\u7684Java\u6e90\u4ee3…<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"template":"","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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