{"id":266,"date":"2026-07-18T08:19:18","date_gmt":"2026-07-18T00:19:18","guid":{"rendered":"http:\/\/ssjava.xyz\/index.php\/2026\/07\/19\/%e6%8a%bd%e8%b1%a1%e7%b1%bb%e4%b8%8e%e6%8a%bd%e8%b1%a1%e6%96%b9%e6%b3%95%ef%bc%9a%e5%8d%8a%e6%88%90%e5%93%81%e8%93%9d%e5%9b%be%e7%9a%84%e8%ae%be%e8%ae%a1%e5%93%b2%e5%ad%a6\/"},"modified":"2026-07-19T11:29:49","modified_gmt":"2026-07-19T03:29:49","slug":"17-%e6%8a%bd%e8%b1%a1%e7%b1%bb%e4%b8%8e%e6%8a%bd%e8%b1%a1%e6%96%b9%e6%b3%95%ef%bc%9a%e5%8d%8a%e6%88%90%e5%93%81%e8%93%9d%e5%9b%be%e7%9a%84%e8%ae%be%e8%ae%a1%e5%93%b2%e5%ad%a6","status":"publish","type":"post","link":"https:\/\/ssjava.xyz\/index.php\/2026\/07\/18\/17-%e6%8a%bd%e8%b1%a1%e7%b1%bb%e4%b8%8e%e6%8a%bd%e8%b1%a1%e6%96%b9%e6%b3%95%ef%bc%9a%e5%8d%8a%e6%88%90%e5%93%81%e8%93%9d%e5%9b%be%e7%9a%84%e8%ae%be%e8%ae%a1%e5%93%b2%e5%ad%a6\/","title":{"rendered":"17. \u62bd\u8c61\u7c7b\u4e0e\u62bd\u8c61\u65b9\u6cd5\uff1a\u534a\u6210\u54c1\u84dd\u56fe\u7684\u8bbe\u8ba1\u54f2\u5b66"},"content":{"rendered":"\n

\u7ee7\u627f\u5b66\u5b8c\u4e86\uff0c\u91cc\u6c0f\u66ff\u6362\u539f\u5219\u4e5f\u61c2\u4e86\u3002\u73b0\u5728\u95ee\u4e00\u4e2a\u95ee\u9898\uff1a\u5982\u679c\u7236\u7c7b\u4e2d\u6709\u4e00\u4e2a\u65b9\u6cd5\uff0c\u6bcf\u4e2a\u5b50\u7c7b\u7684\u5b9e\u73b0\u90fd\u4e0d\u4e00\u6837\uff0c\u90a3\u7236\u7c7b\u5199\u8fd9\u4e2a\u65b9\u6cd5\u7684\u4ee3\u7801\u6709\u4ec0\u4e48\u610f\u4e49\uff1f<\/strong><\/p>\n\n\n\n

\u6bd4\u5982\u52a8\u7269\u4f1a\u300c\u53eb\u300d\u2014\u2014\u72d7\u6c6a\u6c6a\u53eb\u3001\u732b\u55b5\u55b5\u53eb\u3001\u725b\u54de\u54de\u53eb\u3002\u4f60\u603b\u4e0d\u80fd\u5199\u4e00\u4e2aAnimal.eat()<\/code>\u7684\u65b9\u6cd5\u4f53\uff0c\u7136\u540e\u5b50\u7c7b\u5168\u7ed9\u91cd\u5199\u4e86\u5427\uff1f\u90a3\u7236\u7c7b\u7684\u65b9\u6cd5\u4f53\u5c31\u6210\u6446\u8bbe\u4e86\uff0c\u800c\u4e14\u8fd8\u5bb9\u6613\u72af\u4e00\u4e2a\u9519\u8bef\u2014\u2014\u4e07\u4e00\u54ea\u4e2a\u5b50\u7c7b\u5fd8\u4e86\u91cd\u5199\uff0c\u5c31\u76f4\u63a5\u8c03\u4e86\u7236\u7c7b\u7684\u7a7a\u5b9e\u73b0\uff0cBug \u9759\u6084\u6084\u5c31\u6765\u4e86\u3002<\/p>\n\n\n\n

Java \u7684\u8bbe\u8ba1\u8005\u4eec\u5f53\u7136\u60f3\u5230\u4e86\u8fd9\u4e2a\u95ee\u9898\u3002\u4ed6\u4eec\u63d0\u4f9b\u4e86\u4e00\u4e2a\u795e\u5947\u7684\u8bed\u6cd5\u2014\u2014\u62bd\u8c61\u65b9\u6cd5<\/strong>\uff0c\u5b83\u8ba9\u7236\u7c7b\u53ea\u58f0\u660e\u65b9\u6cd5\u7b7e\u540d\uff0c\u4e0d\u7ed9\u5b9e\u73b0\u4f53\uff0c\u5f3a\u5236\u5b50\u7c7b\u53bb\u5b9e\u73b0\u3002\u5982\u679c\u4e00\u4e2a\u7c7b\u91cc\u5305\u542b\u62bd\u8c61\u65b9\u6cd5\uff0c\u90a3\u8fd9\u4e2a\u7c7b\u81ea\u5df1\u4e5f\u5f97\u58f0\u660e\u4e3a\u62bd\u8c61\u7c7b<\/strong>\u3002<\/p>\n\n\n\n

\n

\u62bd\u8c61\u7c7b = \u300c\u90e8\u5206\u5b8c\u6210\u300d\u7684\u7c7b\uff0c\u5b83\u50cf\u4e00\u4efd\u534a\u6210\u54c1\u84dd\u56fe\uff0c\u628a\u4e00\u4e9b\u6838\u5fc3\u7ec6\u8282\u7559\u7ed9\u5b50\u7c7b\u53bb\u5b8c\u6210\u3002<\/p>\n<\/blockquote>\n\n\n\n

\u4e00\u3001\u5148\u770b\u611f\u6027\u7684\u7406\u89e3<\/h2>\n\n\n\n

\u6211\u4eec\u6765\u7c7b\u6bd4\u4e00\u4e2a\u73b0\u5b9e\u573a\u666f\uff1a\u4f60\u5f00\u4e86\u4e00\u4e2a\u300c\u53a8\u5e08\u57f9\u8bad\u73ed\u300d\uff0c\u57f9\u8bad\u6d41\u7a0b\u662f\u7edf\u4e00\u7684\u2014\u2014\u5b66\u5458\u8fdb\u6559\u5ba4\u3001\u7a7f\u53a8\u5e08\u670d\u3001\u8001\u5e08\u8bb2\u7406\u8bba\u3001\u5b66\u5458\u5b9e\u64cd\u3001\u54c1\u5c1d\u70b9\u8bc4\u3001\u4e0b\u8bfe\u79bb\u573a\u3002\u4f46\u662f\u300c\u5b9e\u64cd\u300d\u73af\u8282\u505a\u4ec0\u4e48\u83dc\u5462\uff1f\u5ddd\u83dc\u73ed\u505a\u9ebb\u5a46\u8c46\u8150\u3001\u897f\u70b9\u73ed\u505a\u86cb\u7cd5\u3001\u65e5\u6599\u73ed\u505a\u5bff\u53f8\u2026\u2026<\/p>\n\n\n\n

\u4f60\u8bbe\u8ba1\u7684\u57f9\u8bad\u6d41\u7a0b\u91cc\uff0c\u300c\u5b9e\u64cd\u300d\u73af\u8282\u53ea\u5199\u4e86\u300c\u5b66\u5458\u5b9e\u64cd\u5e76\u5b8c\u6210\u83dc\u54c1\u300d\uff0c\u4f46\u5177\u4f53\u505a\u5565\u2014\u2014\u6bcf\u4e2a\u73ed\u4e0d\u4e00\u6837\u3002\u4f60\u4e0d\u53ef\u80fd\u66ff\u6240\u6709\u73ed\u7684\u5b9e\u64cd\u5199\u597d\u5177\u4f53\u6b65\u9aa4\u3002<\/p>\n\n\n\n

\u5728 Java \u91cc\uff0c\u8fd9\u5c31\u53eb\u62bd\u8c61\u65b9\u6cd5<\/strong>\uff1a\u6211\u77e5\u9053\u8981\u6709\u8fd9\u4e48\u4e2a\u6b65\u9aa4\uff0c\u4f46\u5177\u4f53\u600e\u4e48\u505a\uff0c\u7531\u5b50\u7c7b\u51b3\u5b9a\u3002<\/p>\n\n\n\n

\u4e8c\u3001\u8bed\u6cd5\u5165\u95e8<\/h2>\n\n\n\n

2.1 \u5b9a\u4e49\u4e00\u4e2a\u62bd\u8c61\u7c7b<\/h3>\n\n\n\n
\/\/ \u62bd\u8c61\u7c7b\u7528 abstract \u5173\u952e\u5b57\u4fee\u9970\npublic abstract class Animal {\n\n    \/\/ \u666e\u901a\u5c5e\u6027\n    protected String name;\n    protected int age;\n\n    \/\/ \u666e\u901a\u65b9\u6cd5\u2014\u2014\u6709\u65b9\u6cd5\u4f53\n    public void eat() {\n        System.out.println(name + \" \u6b63\u5728\u5403\u4e1c\u897f\u2026\u2026\");\n    }\n\n    \/\/ \u62bd\u8c61\u65b9\u6cd5\u2014\u2014\u6ca1\u6709\u65b9\u6cd5\u4f53\uff0c\u53ea\u6709\u58f0\u660e\n    public abstract void sound();\n\n    \/\/ \u62bd\u8c61\u65b9\u6cd5\u4e5f\u53ef\u4ee5\u6709\u53c2\u6570\u548c\u8fd4\u56de\u503c\n    public abstract String getInfo();\n}<\/code><\/pre>\n\n\n\n
\u6ce8\u610f\u51e0\u4e2a\u5173\u952e\u70b9\uff1a<\/p>\n\n\n\n
    \n
  1. \u4f7f\u7528 abstract<\/code> \u5173\u952e\u5b57\u4fee\u9970\u7c7b \u2192 \u8fd9\u4e2a\u7c7b\u5c31\u662f\u62bd\u8c61\u7c7b<\/li>\n\n\n\n
  2. \u62bd\u8c61\u65b9\u6cd5\u4e5f\u53ea\u6709 abstract<\/code> \u5173\u952e\u5b57\uff0c\u6ca1\u6709\u65b9\u6cd5\u4f53<\/strong>\uff08\u8fde\u82b1\u62ec\u53f7\u90fd\u6ca1\u6709\uff0c\u76f4\u63a5\u5206\u53f7\u7ed3\u5c3e\uff09<\/li>\n\n\n\n
  3. \u62bd\u8c61\u7c7b\u53ef\u4ee5\u540c\u65f6\u5305\u542b<\/strong>\u666e\u901a\u65b9\u6cd5\u548c\u62bd\u8c61\u65b9\u6cd5\u2014\u2014\u5b83\u4e0d\u662f”\u5b8c\u5168\u4e0d\u53ef\u7528\u7684\u7c7b”\uff0c\u800c\u662f”\u90e8\u5206\u5b9e\u73b0\u4e86\u7684\u7c7b”<\/li>\n\n\n\n
  4. \u62bd\u8c61\u7c7b\u4e5f\u53ef\u4ee5\u6709\u6784\u9020\u5668\u3001\u6210\u5458\u53d8\u91cf\u3001\u9759\u6001\u65b9\u6cd5\u2014\u2014\u666e\u901a\u7c7b\u80fd\u6709\u7684\u5b83\u57fa\u672c\u90fd\u6709<\/li>\n<\/ol>\n\n\n\n
    2.2 \u5b50\u7c7b\u5b9e\u73b0\u62bd\u8c61\u65b9\u6cd5<\/h3>\n\n\n\n
    \/\/ \u5b50\u7c7b\u5fc5\u987b\u5b9e\u73b0\u7236\u7c7b\u6240\u6709\u7684\u62bd\u8c61\u65b9\u6cd5\uff0c\u5426\u5219\u5b50\u7c7b\u4e5f\u8981\u58f0\u660e\u4e3a\u62bd\u8c61\u7c7b\npublic class Dog extends Animal {\n\n    public Dog(String name, int age) {\n        this.name = name;\n        this.age = age;\n    }\n\n    @Override\n    public void sound() {\n        System.out.println(name + \" \u6c6a\u6c6a\u6c6a\uff01\");\n    }\n\n    @Override\n    public String getInfo() {\n        return \"\u72d7\u540d\uff1a\" + name + \"\uff0c\u5e74\u9f84\uff1a\" + age + \"\u5c81\";\n    }\n}\n\npublic class Cat extends Animal {\n\n    public Cat(String name, int age) {\n        this.name = name;\n        this.age = age;\n    }\n\n    @Override\n    public void sound() {\n        System.out.println(name + \" \u55b5\u55b5\u55b5\uff5e\");\n    }\n\n    @Override\n    public String getInfo() {\n        return \"\u732b\u540d\uff1a\" + name + \"\uff0c\u5e74\u9f84\uff1a\" + age + \"\u5c81\";\n    }\n}<\/code><\/pre>\n\n\n\n
    2.3 \u4f7f\u7528\u62bd\u8c61\u7c7b\u548c\u5b50\u7c7b<\/h3>\n\n\n\n
    public class Main {\n    public static void main(String[] args) {\n        \/\/ \u274c \u62bd\u8c61\u7c7b\u4e0d\u80fd\u76f4\u63a5 new\n        \/\/ Animal animal = new Animal(); \/\/ \u7f16\u8bd1\u9519\u8bef\uff01\n\n        \/\/ \u2705 \u4f46\u53ef\u4ee5\u58f0\u660e\u62bd\u8c61\u7c7b\u7684\u5f15\u7528\uff0c\u6307\u5411\u5b50\u7c7b\u5bf9\u8c61\uff08\u5411\u4e0a\u8f6c\u578b\uff09\n        Animal dog = new Dog(\"\u65fa\u8d22\", 3);\n        Animal cat = new Cat(\"\u54aa\u54aa\", 2);\n\n        dog.eat();    \/\/ \u8c03\u7684\u662f\u666e\u901a\u65b9\u6cd5\uff08\u7ee7\u627f\u81eaAnimal\uff09\n        dog.sound();  \/\/ \u8c03\u7684\u662f Dog \u91cd\u5199\u7684 sound()\n        System.out.println(dog.getInfo());\n\n        cat.eat();\n        cat.sound();\n        System.out.println(cat.getInfo());\n    }\n}<\/code><\/pre>\n\n\n\n
    \u8f93\u51fa\uff1a<\/p>\n\n\n\n
    \u65fa\u8d22 \u6b63\u5728\u5403\u4e1c\u897f\u2026\u2026\n\u65fa\u8d22 \u6c6a\u6c6a\u6c6a\uff01\n\u72d7\u540d\uff1a\u65fa\u8d22\uff0c\u5e74\u9f84\uff1a3\u5c81\n\u54aa\u54aa \u6b63\u5728\u5403\u4e1c\u897f\u2026\u2026\n\u54aa\u54aa \u55b5\u55b5\u55b5\uff5e\n\u732b\u540d\uff1a\u54aa\u54aa\uff0c\u5e74\u9f84\uff1a2\u5c81<\/code><\/pre>\n\n\n\n
    \u8fd9\u6837\u5c31\u5b8c\u7f8e\u4e86\u2014\u2014Animal<\/code> \u5b9a\u4e49\u4e86\u4e00\u4e2a\u300c\u5408\u7ea6\u300d\uff1a\u6240\u6709\u52a8\u7269\u90fd\u4f1a\u53eb\uff0c\u4f46\u5177\u4f53\u600e\u4e48\u53eb\uff0c\u6bcf\u4e2a\u52a8\u7269\u81ea\u5df1\u51b3\u5b9a\u3002\u5982\u679c\u6709\u4eba\u60f3\u65b0\u589e\u4e00\u4e2a Pig<\/code> \u7c7b\uff0c\u7f16\u8bd1\u5668\u4f1a\u5f3a\u5236<\/strong>\u4ed6\u5b9e\u73b0 sound()<\/code> \u548c getInfo()<\/code> \u65b9\u6cd5\uff0c\u6f0f\u4e00\u4e2a\u90fd\u7f16\u8bd1\u4e0d\u901a\u8fc7\u3002\u5408\u7ea6\u5f3a\u5236\u9075\u5b88<\/strong>\uff0c\u8fd9\u5c31\u53eb\u8bbe\u8ba1\u4fdd\u969c\u3002<\/p>\n\n\n\n
    \n\n\n\n
    \u4e09\u3001\u62bd\u8c61\u7c7b\u7684\u6838\u5fc3\u7279\u6027\u4e0e\u6ce8\u610f\u4e8b\u9879<\/h2>\n\n\n\n
    3.1 \u62bd\u8c61\u7c7b\u4e0d\u80fd\u5b9e\u4f8b\u5316<\/h3>\n\n\n\n
    \u8fd9\u662f\u6700\u57fa\u7840\u4f46\u53c8\u6700\u597d\u7406\u89e3\u7684\u4e00\u6761\u3002new Animal()<\/code> \u76f4\u63a5\u7f16\u8bd1\u62a5\u9519\u3002\u4e3a\u4ec0\u4e48\uff1f\u56e0\u4e3a\u4f60\u521b\u5efa\u4e00\u4e2a”\u52a8\u7269”\u5bf9\u8c61\uff0c\u5b83\u53eb\u4e0d\u51fa\u6765\uff0c\u6ca1\u6709\u610f\u4e49\u2014\u2014\u62bd\u8c61\u7c7b\u5929\u751f\u5c31\u662f\u4e0d\u5b8c\u6574\u7684\u3002<\/p>\n\n\n\n
    \u4f46\u53cd\u8fc7\u6765\uff0c\u4e0a\u9762\u4f60\u770b\u5230\u4e86\uff1a\u62bd\u8c61\u7c7b\u53ef\u4ee5\u6709\u6784\u9020\u5668<\/strong>\u3002\u8fd9\u77db\u76fe\u5417\uff1f\u4e0d\u77db\u76fe\u3002 \u6784\u9020\u5668\u662f\u7ed9\u5b50\u7c7b\u7528\u7684\u2014\u2014\u5b50\u7c7b\u521b\u5efa\u5bf9\u8c61\u65f6\uff0c\u4f1a\u901a\u8fc7 super()<\/code> \u8c03\u7528\u7236\u7c7b\u7684\u6784\u9020\u5668\u6765\u521d\u59cb\u5316\u7236\u7c7b\u4e2d\u5b9a\u4e49\u7684\u5c5e\u6027\u3002<\/p>\n\n\n\n
    public abstract class Animal {\n    protected String name;\n    protected int age;\n\n    \/\/ \u62bd\u8c61\u7c7b\u53ef\u4ee5\u6709\u6784\u9020\u5668\uff0c\u4f46\u53ea\u80fd\u88ab\u5b50\u7c7b\u8c03\u7528\n    public Animal(String name, int age) {\n        this.name = name;\n        this.age = age;\n    }\n\n    public abstract void sound();\n}\n\npublic class Dog extends Animal {\n    public Dog(String name, int age) {\n        super(name, age); \/\/ \u8c03\u7528\u7236\u7c7b\u6784\u9020\u5668\n    }\n\n    @Override\n    public void sound() {\n        System.out.println(name + \" \u6c6a\u6c6a\u6c6a\uff01\");\n    }\n}<\/code><\/pre>\n\n\n\n
    3.2 \u62bd\u8c61\u7c7b\u53ef\u4ee5\u6709\u6210\u5458\u53d8\u91cf\u548c\u5e38\u91cf<\/h3>\n\n\n\n
    \u62bd\u8c61\u7c7b\u53ef\u4ee5\u5b9a\u4e49\u5b9e\u4f8b\u53d8\u91cf\uff0c\u4e5f\u53ef\u4ee5\u5b9a\u4e49\u5e38\u91cf \u2014 \u8fd9\u4e9b\u90fd\u53ef\u4ee5\u88ab\u7ee7\u627f\u7ed9\u5b50\u7c7b\u4f7f\u7528\u3002<\/p>\n\n\n\n
    public abstract class Shape {\n    protected String color;         \/\/ \u6210\u5458\u53d8\u91cf\n    public static final double PI = 3.1415926535;  \/\/ \u5e38\u91cf\n\n    public Shape(String color) {\n        this.color = color;\n    }\n\n    public abstract double area();     \/\/ \u62bd\u8c61\u65b9\u6cd5\n    public abstract double perimeter();\n\n    \/\/ \u666e\u901a\u65b9\u6cd5\uff1a\u6240\u6709\u5b50\u7c7b\u5171\u7528\n    public void displayInfo() {\n        System.out.println(\"\u989c\u8272\uff1a\" + color);\n        System.out.println(\"\u9762\u79ef\uff1a\" + area());\n        System.out.println(\"\u5468\u957f\uff1a\" + perimeter());\n    }\n}\n\npublic class Circle extends Shape {\n    private double radius;\n\n    public Circle(String color, double radius) {\n        super(color);\n        this.radius = radius;\n    }\n\n    @Override\n    public double area() {\n        return PI * radius * radius; \/\/ \u4f7f\u7528\u7236\u7c7b\u5b9a\u4e49\u7684 PI\n    }\n\n    @Override\n    public double perimeter() {\n        return 2 * PI * radius;\n    }\n}\n\npublic class Rectangle extends Shape {\n    private double width;\n    private double height;\n\n    public Rectangle(String color, double width, double height) {\n        super(color);\n        this.width = width;\n        this.height = height;\n    }\n\n    @Override\n    public double area() {\n        return width * height;\n    }\n\n    @Override\n    public double perimeter() {\n        return 2 * (width + height);\n    }\n}<\/code><\/pre>\n\n\n\n
    \u6d4b\u8bd5\u4e00\u4e0b\uff1a<\/p>\n\n\n\n
    public class Main {\n    public static void main(String[] args) {\n        Shape circle = new Circle(\"\u7ea2\u8272\", 5.0);\n        Shape rect = new Rectangle(\"\u84dd\u8272\", 4.0, 6.0);\n\n        circle.displayInfo(); \/\/ \u8c03\u666e\u901a\u65b9\u6cd5\n        System.out.println(\"---\");\n        rect.displayInfo();   \/\/ \u591a\u6001\uff1a\u4e0d\u540c\u5b50\u7c7b\u4e0d\u540c\u884c\u4e3a\n    }\n}<\/code><\/pre>\n\n\n\n
    \u8f93\u51fa\uff1a<\/p>\n\n\n\n
    \u989c\u8272\uff1a\u7ea2\u8272\n\u9762\u79ef\uff1a78.5398163375\n\u5468\u957f\uff1a31.415926535\n\n\u989c\u8272\uff1a\u84dd\u8272\n\u9762\u79ef\uff1a24.0\n\u5468\u957f\uff1a20.0<\/code><\/pre>\n\n\n\n
    3.3 \u62bd\u8c61\u65b9\u6cd5\u4e0d\u80fd\u7528 private\u3001static\u3001final \u4fee\u9970<\/h3>\n\n\n\n
    \u8fd9\u662f\u9762\u8bd5\u4e2d\u7ecf\u5e38\u6316\u5751\u7684\u5730\u65b9\uff1a<\/p>\n\n\n\n
    \u4fee\u9970\u7b26<\/th>\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u548c abstract \u4e00\u8d77\u7528\uff1f<\/th><\/tr><\/thead>
    private<\/code><\/td>private \u65b9\u6cd5\u5b50\u7c7b\u770b\u4e0d\u5230\uff0c\u65e0\u6cd5\u91cd\u5199\uff0c\u4f46\u62bd\u8c61\u65b9\u6cd5\u7684\u76ee\u6807\u5c31\u662f\u8ba9\u5b50\u7c7b\u5b9e\u73b0\uff0c\u81ea\u76f8\u77db\u76fe\u3002<\/td><\/tr>
    static<\/code><\/td>static \u65b9\u6cd5\u5c5e\u4e8e\u7c7b\uff0c\u4e0d\u80fd\u88ab\u5b50\u7c7b\u91cd\u5199\uff08\u53ea\u80fd\u9690\u85cf\uff09\uff0c\u62bd\u8c61\u65b9\u6cd5\u8981\u6c42\u52a8\u6001\u7ed1\u5b9a\uff0c\u77db\u76fe\u3002<\/td><\/tr>
    final<\/code><\/td>final \u65b9\u6cd5\u7981\u6b62\u5b50\u7c7b\u91cd\u5199\uff0c\u62bd\u8c61\u65b9\u6cd5\u5f3a\u5236\u5b50\u7c7b\u5b9e\u73b0\uff0c\u76f4\u63a5\u51b2\u7a81\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
    \u4e00\u53e5\u8bdd\u8bb0\uff1a\u62bd\u8c61\u65b9\u6cd5\u5929\u751f\u5c31\u662f\u8981\u88ab\u91cd\u5199\u7684\uff0c\u6240\u4ee5\u548c\u7981\u6b62\u91cd\u5199\u7684\u5173\u952e\u5b57\uff08private\/static\/final\uff09\u662f\u6b7b\u5bf9\u5934\u3002<\/strong><\/p>\n\n\n\n
    3.4 \u62bd\u8c61\u7c7b\u53ef\u4ee5\u6709\u9759\u6001\u65b9\u6cd5\u548c main \u65b9\u6cd5<\/h3>\n\n\n\n
    \u4f60\u6ca1\u770b\u9519\u2014\u2014\u62bd\u8c61\u7c7b\u4e5f\u80fd\u6709\u81ea\u5df1\u7684 main()<\/code> \u65b9\u6cd5\uff0c\u53ef\u4ee5\u76f4\u63a5\u8fd0\u884c\uff1a<\/p>\n\n\n\n
    public abstract class Demo {\n    public abstract void doSomething();\n\n    public static void main(String[] args) {\n        System.out.println(\"\u62bd\u8c61\u7c7b\u4e5f\u80fd\u8fd0\u884c main \u65b9\u6cd5\uff01\");\n        \/\/ \u4f46\u4e0d\u80fd\u5728\u8fd9\u91cc\u521b\u5efa\u81ea\u5df1\u7684\u5b9e\u4f8b\n    }\n}<\/code><\/pre>\n\n\n\n
    \u867d\u7136\u4f60\u4e0d\u80fd new Demo()<\/code>\uff0c\u4f46\u9759\u6001\u65b9\u6cd5\u8ddf\u5bf9\u8c61\u6ca1\u5173\u7cfb\uff0c\u6240\u4ee5\u5b8c\u5168\u5408\u6cd5\u3002\u8fd9\u53ef\u4ee5\u7528\u6765\u653e\u4e00\u4e9b\u5de5\u5382\u65b9\u6cd5\u6216\u8005\u5de5\u5177\u903b\u8f91\u3002<\/p>\n\n\n\n
    3.5 \u5b50\u7c7b\u53ef\u4ee5\u4e0d\u88ab\u5b9e\u73b0\uff1f<\/h3>\n\n\n\n
    \u5982\u679c\u4e00\u4e2a\u5b50\u7c7b\u4e0d\u60f3\u5b9e\u73b0\u7236\u7c7b\u7684\u6240\u6709\u62bd\u8c61\u65b9\u6cd5\uff0c\u90a3\u5b83\u81ea\u5df1\u4e5f\u5f97\u662f\u62bd\u8c61\u7c7b<\/strong>\uff1a<\/p>\n\n\n\n
    public abstract class Animal {\n    public abstract void sound();\n    public abstract void move();\n}\n\n\/\/ Dog \u53ea\u5b9e\u73b0\u4e86 sound()\uff0c\u6ca1\u5b9e\u73b0 move() \u2014\u2014 \u5b83\u5fc5\u987b\u4e5f\u58f0\u660e\u4e3a abstract\npublic abstract class Dog extends Animal {\n    @Override\n    public void sound() {\n        System.out.println(\"\u6c6a\u6c6a\u6c6a\");\n    }\n    \/\/ move() \u6ca1\u5b9e\u73b0\uff0c\u7559\u7ed9\u66f4\u5177\u4f53\u7684\u5b50\u7c7b\n}\n\n\/\/ Husky \u7ec8\u4e8e\u5168\u90e8\u5b9e\u73b0\u4e86\npublic class Husky extends Dog {\n    @Override\n    public void move() {\n        System.out.println(\"\u54c8\u58eb\u5947\u5728\u6ee1\u5c4b\u5b50\u8dd1\u2026\u2026\");\n    }\n}<\/code><\/pre>\n\n\n\n
    \u8fd9\u5728\u5927\u578b\u7ee7\u627f\u4f53\u7cfb\u91cc\u5f88\u5e38\u89c1\u2014\u2014\u4e2d\u95f4\u5c42\u62bd\u8c61\u7c7b\u8d1f\u8d23\u5b9e\u73b0\u4e00\u90e8\u5206\u62bd\u8c61\u65b9\u6cd5\uff0c\u5269\u4e0b\u7684\u4ea4\u7ed9\u66f4\u5177\u4f53\u7684\u5b50\u7c7b\u3002\u9010\u5c42\u5b9e\u73b0\uff0c\u9010\u6e10\u5177\u4f53\u5316\u3002<\/p>\n\n\n\n
    \n\n\n\n
    \u56db\u3001\u62bd\u8c61\u7c7b vs \u666e\u901a\u7c7b\uff1a\u4ec0\u4e48\u65f6\u5019\u7528\u62bd\u8c61\u7c7b\uff1f<\/h2>\n\n\n\n
    \u5bf9\u6bd4\u7ef4\u5ea6<\/th>\u62bd\u8c61\u7c7b<\/th>\u666e\u901a\u7c7b<\/th><\/tr><\/thead>
    \u5b9e\u4f8b\u5316<\/td>\u274c \u4e0d\u80fd new<\/td>\u2705 \u53ef\u4ee5 new<\/td><\/tr>
    \u62bd\u8c61\u65b9\u6cd5<\/td>\u2705 \u53ef\u4ee5\u6709<\/td>\u274c \u4e0d\u80fd\u6709<\/td><\/tr>
    \u6210\u5458\u53d8\u91cf<\/td>\u2705 \u53ef\u4ee5\u6709<\/td>\u2705 \u53ef\u4ee5\u6709<\/td><\/tr>
    \u6784\u9020\u5668<\/td>\u2705 \u53ef\u4ee5\u6709<\/td>\u2705 \u53ef\u4ee5\u6709<\/td><\/tr>
    \u666e\u901a\u65b9\u6cd5<\/td>\u2705 \u53ef\u4ee5\u6709<\/td>\u2705 \u53ef\u4ee5\u6709<\/td><\/tr>
    \u9759\u6001\u65b9\u6cd5\/\u5e38\u91cf<\/td>\u2705 \u53ef\u4ee5\u6709<\/td>\u2705 \u53ef\u4ee5\u6709<\/td><\/tr>
    \u8bbe\u8ba1\u76ee\u7684<\/td>\u5b9a\u4e49\u516c\u5171\u5c5e\u6027\u548c\u884c\u4e3a\u6a21\u677f\uff0c\u90e8\u5206\u884c\u4e3a\u4e0d\u786e\u5b9a<\/td>\u5b8c\u6574\u53ef\u7528\u7684\u7c7b<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
    \u4ec0\u4e48\u65f6\u5019\u7528\u62bd\u8c61\u7c7b\uff1f\u8bb0\u4f4f\u8fd9\u4e09\u70b9\u5c31\u591f\u4e86\uff1a<\/strong><\/p>\n\n\n\n
      \n
    1. \u591a\u4e2a\u5b50\u7c7b\u6709\u516c\u5171\u7684\u5c5e\u6027\u548c\u884c\u4e3a<\/strong>\uff08\u6210\u5458\u53d8\u91cf + \u666e\u901a\u65b9\u6cd5\uff09\uff0c\u53ef\u4ee5\u63d0\u53d6\u5230\u7236\u7c7b\u590d\u7528<\/li>\n\n\n
    2. \u90e8\u5206\u884c\u4e3a\u6bcf\u4e2a\u5b50\u7c7b\u5404\u4e0d\u76f8\u540c<\/strong>\uff0c\u7236\u7c7b\u65e0\u6cd5\u7ed9\u51fa\u6709\u610f\u4e49\u7684\u9ed8\u8ba4\u5b9e\u73b0<\/li>\n\n\n
    3. \u60f3\u8ba9\u7236\u7c7b\u4e0d\u80fd\u88ab\u76f4\u63a5\u5b9e\u4f8b\u5316\uff0c\u9632\u6b62\u5f00\u53d1\u8005\u8bef\u7528<\/li>\n<\/ol>\n\n\n\n
      \u7b80\u5355\u8bf4\uff1a\u4f60\u53d1\u73b0\u4e0d\u540c\u7c7b\u4e4b\u95f4\u300c\u6709\u5171\u540c\u70b9\uff0c\u4f46\u67d0\u4e9b\u884c\u4e3a\u5c31\u662f\u4e0d\u4e00\u6837\u300d\uff0c\u5c31\u628a\u5171\u540c\u70b9\u62bd\u8c61\u5230\u7236\u7c7b\uff0c\u628a\u4e0d\u4e00\u6837\u7684\u5730\u65b9\u58f0\u660e\u6210\u62bd\u8c61\u65b9\u6cd5\u3002<\/strong><\/p>\n\n\n\n
      \n\n\n\n
      \u4e94\u3001\u5b9e\u6218\u6848\u4f8b\uff1a\u5458\u5de5\u85aa\u8d44\u8ba1\u7b97\u7cfb\u7edf<\/h2>\n\n\n\n
      \u5149\u8bb2\u7406\u8bba\u4e0d\u8fc7\u763e\uff0c\u54b1\u4eec\u5199\u4e00\u4e2a\u5b9e\u9645\u7ec3\u4e60\u3002\u5047\u8bbe\u4f60\u5728\u7ed9\u4e00\u4e2a\u516c\u53f8\u5199\u85aa\u8d44\u7cfb\u7edf\uff1a<\/p>\n\n\n\n
        \n
      1. \u5168\u804c\u5458\u5de5\uff08FullTimeEmployee\uff09<\/strong>\uff1a\u6708\u85aa\u56fa\u5b9a\uff0c\u6bcf\u6708\u62ff\u56fa\u5b9a\u5de5\u8d44<\/li>\n\n\n
      2. \u517c\u804c\u5458\u5de5\uff08PartTimeEmployee\uff09<\/strong>\uff1a\u6309\u5c0f\u65f6\u8ba1\u85aa\uff0c\u6708\u5e95\u7ed3\u7b97<\/li>\n\n\n
      3. \u5b9e\u4e60\u751f\uff08Intern\uff09<\/strong>\uff1a\u6309\u6708\u9886\u56fa\u5b9a\u6d25\u8d34\uff0c\u4f46\u91d1\u989d\u6bd4\u5168\u804c\u5c11<\/li>\n<\/ol>\n\n\n\n
        \u6240\u6709\u5458\u5de5\u90fd\u6709\u540d\u5b57\u3001\u5de5\u53f7\u548c\u85aa\u6c34\u8ba1\u7b97\u65b9\u6cd5\uff0c\u4f46\u8ba1\u7b97\u65b9\u5f0f\u4e0d\u540c\u2014\u2014\u5178\u578b\u7684\u62bd\u8c61\u7c7b\u573a\u666f\u3002<\/p>\n\n\n\n
        5.1 \u62bd\u8c61\u7236\u7c7b Employee<\/h3>\n\n\n\n
        public abstract class Employee {\n    protected String name;\n    protected String id;\n\n    public Employee(String name, String id) {\n        this.name = name;\n        this.id = id;\n    }\n\n    \/\/ \u62bd\u8c61\u65b9\u6cd5\uff1a\u8ba1\u7b97\u6708\u85aa\u2014\u2014\u6bcf\u4e2a\u5458\u5de5\u7c7b\u578b\u4e0d\u540c\n    public abstract double calculateMonthlySalary();\n\n    \/\/ \u666e\u901a\u65b9\u6cd5\uff1a\u6253\u5370\u5de5\u8d44\u5355\uff08\u6240\u6709\u5458\u5de5\u5171\u7528\uff09\n    public void printPaySlip() {\n        System.out.println(\"=== \u5de5\u8d44\u5355 ===\");\n        System.out.println(\"\u59d3\u540d\uff1a\" + name);\n        System.out.println(\"\u5de5\u53f7\uff1a\" + id);\n        System.out.println(\"\u672c\u6708\u85aa\u8d44\uff1a\u00a5\" + calculateMonthlySalary());\n        System.out.println(\"==============\");\n    }\n}<\/code><\/pre>\n\n\n\n
        5.2 \u5168\u804c\u5458\u5de5<\/h3>\n\n\n\n
        public class FullTimeEmployee extends Employee {\n    private double monthlySalary;\n\n    public FullTimeEmployee(String name, String id, double monthlySalary) {\n        super(name, id);\n        this.monthlySalary = monthlySalary;\n    }\n\n    @Override\n    public double calculateMonthlySalary() {\n        \/\/ \u5168\u804c\u5458\u5de5\u7b80\u5355\u7684\u56fa\u5b9a\u6708\u85aa\n        return monthlySalary;\n    }\n}<\/code><\/pre>\n\n\n\n
        5.3 \u517c\u804c\u5458\u5de5<\/h3>\n\n\n\n
        public class PartTimeEmployee extends Employee {\n    private double hourlyRate;    \/\/ \u65f6\u85aa\n    private int hoursWorked;      \/\/ \u672c\u6708\u5de5\u4f5c\u5c0f\u65f6\u6570\n\n    public PartTimeEmployee(String name, String id,\n                            double hourlyRate, int hoursWorked) {\n        super(name, id);\n        this.hourlyRate = hourlyRate;\n        this.hoursWorked = hoursWorked;\n    }\n\n    @Override\n    public double calculateMonthlySalary() {\n        return hourlyRate * hoursWorked;\n    }\n}<\/code><\/pre>\n\n\n\n
        5.4 \u5b9e\u4e60\u751f<\/h3>\n\n\n\n
        public class Intern extends Employee {\n    private double stipend;  \/\/ \u5b9e\u4e60\u6d25\u8d34\n\n    public Intern(String name, String id, double stipend) {\n        super(name, id);\n        this.stipend = stipend;\n    }\n\n    @Override\n    public double calculateMonthlySalary() {\n        \/\/ \u5b9e\u4e60\u751f\u53ea\u62ff\u6d25\u8d34\n        return stipend;\n    }\n}<\/code><\/pre>\n\n\n\n
        5.5 \u6d4b\u8bd5\u8fd0\u884c<\/h3>\n\n\n\n
        public class PayrollSystem {\n    public static void main(String[] args) {\n        \/\/ \u6240\u6709\u5458\u5de5\u7528 Employee \u5f15\u7528\u7ba1\u7406\u2014\u2014\u591a\u6001\n        Employee[] employees = new Employee[] {\n            new FullTimeEmployee(\"\u5f20\u4e09\", \"FT001\", 15000.0),\n            new PartTimeEmployee(\"\u674e\u56db\", \"PT001\", 50.0, 80),\n            new Intern(\"\u738b\u4e94\", \"IN001\", 3000.0)\n        };\n\n        \/\/ \u7edf\u4e00\u6253\u5370\u5de5\u8d44\u5355\n        for (Employee emp : employees) {\n            emp.printPaySlip();\n            System.out.println();\n        }\n\n        \/\/ \u8ba1\u7b97\u516c\u53f8\u672c\u6708\u603b\u85aa\u8d44\u652f\u51fa\n        double total = 0;\n        for (Employee emp : employees) {\n            total += emp.calculateMonthlySalary();\n        }\n        System.out.println(\"\u516c\u53f8\u672c\u6708\u85aa\u8d44\u603b\u652f\u51fa\uff1a\u00a5\" + total);\n    }\n}<\/code><\/pre>\n\n\n\n
        \u8f93\u51fa\u7ed3\u679c\uff1a<\/p>\n\n\n\n
        === \u5de5\u8d44\u5355 ===\n\u59d3\u540d\uff1a\u5f20\u4e09\n\u5de5\u53f7\uff1aFT001\n\u672c\u6708\u85aa\u8d44\uff1a\u00a515000.0\n==============\n\n=== \u5de5\u8d44\u5355 ===\n\u59d3\u540d\uff1a\u674e\u56db\n\u5de5\u53f7\uff1aPT001\n\u672c\u6708\u85aa\u8d44\uff1a\u00a54000.0\n==============\n\n=== \u5de5\u8d44\u5355 ===\n\u59d3\u540d\uff1a\u738b\u4e94\n\u5de5\u53f7\uff1aIN001\n\u672c\u6708\u85aa\u8d44\uff1a\u00a53000.0\n==============\n\n\u516c\u53f8\u672c\u6708\u85aa\u8d44\u603b\u652f\u51fa\uff1a\u00a522000.0<\/code><\/pre>\n\n\n\n
        \u770b\u5230\u4e86\u5427\u2014\u2014\u65b0\u589e\u4e00\u79cd\u5458\u5de5\u7c7b\u578b\uff08\u6bd4\u5982\u6539\u6210Contractor<\/code>\u5916\u5305\u5458\u5de5\uff09\uff0c\u53ea\u9700\u8981\u518d\u7ee7\u627f Employee<\/code>\uff0c\u5b9e\u73b0\u4e00\u4e2a calculateMonthlySalary()<\/code> \u5c31\u884c\u4e86\u3002\u539f\u6709\u7684\u5faa\u73af\u7ba1\u7406\u4ee3\u7801\u4e00\u4e2a\u5b57\u90fd\u4e0d\u7528\u6539\u3002\u5f00\u95ed\u539f\u5219\uff08\u5bf9\u6269\u5c55\u5f00\u653e\uff0c\u5bf9\u4fee\u6539\u5173\u95ed\uff09<\/strong>\uff0c\u62bd\u8c61\u7c7b\u5e2e\u6211\u4eec\u505a\u5230\u4e86\u3002<\/p>\n\n\n\n
        \n\n\n\n
        \u516d\u3001\u62bd\u8c61\u7c7b\u4e0e\u7ee7\u627f\u7684\u5bf9\u6bd4\u603b\u7ed3<\/h2>\n\n\n\n
        \u5230\u76ee\u524d\u4e3a\u6b62\uff0c\u4f60\u5df2\u7ecf\u63a5\u89e6\u4e86\u7ee7\u627f\u548c\u62bd\u8c61\u7c7b\u3002\u505a\u4e2a\u5bf9\u6bd4\uff1a<\/p>\n\n\n\n
        \u5bf9\u6bd4\u7ef4\u5ea6<\/th>\u666e\u901a\u7ee7\u627f<\/th>\u62bd\u8c61\u7c7b<\/th><\/tr><\/thead>
        \u7236\u7c7b\u662f\u5426\u6709\u65b9\u6cd5\u4f53<\/td>\u6240\u6709\u65b9\u6cd5\u90fd\u6709\u5b9e\u73b0<\/td>\u90e8\u5206\u65b9\u6cd5\u6ca1\u6709\u5b9e\u73b0\uff08\u62bd\u8c61\u65b9\u6cd5\uff09<\/td><\/tr>
        \u7236\u7c7b\u80fd\u5426\u5b9e\u4f8b\u5316<\/td>\u2705 \u53ef\u4ee5<\/td>\u274c \u4e0d\u53ef\u4ee5<\/td><\/tr>
        \u5b50\u7c7b\u5fc5\u987b\u5b9e\u73b0\u7684<\/td>\u9009\u62e9\u6027\u91cd\u5199\uff08\u4e0d\u5f3a\u5236\uff09<\/td>\u5f3a\u5236\u6240\u6709\u62bd\u8c61\u65b9\u6cd5<\/td><\/tr>
        \u8bbe\u8ba1\u610f\u56fe<\/td>\u4ee3\u7801\u590d\u7528 + \u5c42\u6b21\u5173\u7cfb<\/td>\u5b9a\u4e49\u884c\u4e3a\u89c4\u8303 + \u7ea6\u675f\u5b50\u7c7b<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
        \u6709\u7ee7\u627f\u4e0d\u4e00\u5b9a\u9700\u8981\u62bd\u8c61\u7c7b\uff0c\u4f46\u6709\u62bd\u8c61\u65b9\u6cd5\u5fc5\u987b\u662f\u62bd\u8c61\u7c7b\u3002\u5f53\u4f60\u5199\u7236\u7c7b\u53d1\u73b0\u67d0\u4e2a\u65b9\u6cd5\u5199\u4e0d\u51fa\u901a\u7528\u7684\u5b9e\u73b0<\/strong>\uff0c\u6216\u8005\u5199\u51fa\u6765\u4e5f\u6ca1\u610f\u4e49\u53cd\u6b63\u5b50\u7c7b\u90fd\u8981\u91cd\u5199<\/strong>\u2014\u2014\u90a3\u5c31\u8be5\u7528\u62bd\u8c61\u65b9\u6cd5\u4e86\u3002<\/p>\n\n\n\n
        \n\n\n\n
        \u4e03\u3001\u9762\u8bd5\u4e2d\u5e38\u89c1\u95ee\u9898<\/h2>\n\n\n\n
        \u6574\u7406\u51e0\u4e2a\u9762\u8bd5\u9ad8\u9891\u9898\uff0c\u5e2e\u4f60\u52a0\u6df1\u7406\u89e3\uff1a<\/p>\n\n\n\n
        Q1\uff1a\u62bd\u8c61\u7c7b\u548c\u666e\u901a\u7c7b\u7684\u533a\u522b\uff1f<\/h3>\n\n\n\n
        \u6700\u7b80\u5355\u7684\u7b54\u6cd5\uff1a\u62bd\u8c61\u7c7b\u7528 abstract<\/code> \u4fee\u9970\u3001\u4e0d\u80fd new<\/code>\u3001\u53ef\u4ee5\u6709\u62bd\u8c61\u65b9\u6cd5\u2014\u2014\u5176\u4ed6\u548c\u666e\u901a\u7c7b\u4e00\u6837\u3002\u62bd\u8c61\u7c7b\u7684\u6838\u5fc3\u4ef7\u503c\u662f\u5b9a\u4e49\u884c\u4e3a\u89c4\u8303<\/strong>\uff0c\u666e\u901a\u7c7b\u7684\u6838\u5fc3\u4ef7\u503c\u662f\u76f4\u63a5\u4f7f\u7528<\/strong>\u3002<\/p>\n\n\n\n
        Q2\uff1a\u62bd\u8c61\u65b9\u6cd5\u80fd\u4e0d\u80fd\u662f private \u7684\uff1f<\/h3>\n\n\n\n
        \u4e0d\u80fd\u3002private \u65b9\u6cd5\u5b50\u7c7b\u4e0d\u53ef\u89c1\uff0c\u800c\u62bd\u8c61\u65b9\u6cd5\u9700\u8981\u5b50\u7c7b\u5b9e\u73b0\u2014\u2014private + abstract = \u903b\u8f91\u6b7b\u5faa\u73af<\/strong>\u3002<\/p>\n\n\n\n
        Q3\uff1a\u62bd\u8c61\u7c7b\u80fd\u4e0d\u80fd\u6ca1\u6709\u62bd\u8c61\u65b9\u6cd5\uff1f<\/h3>\n\n\n\n
        \u53ef\u4ee5\uff01\u4f60\u53ef\u4ee5\u58f0\u660e\u4e00\u4e2a\u6ca1\u6709\u62bd\u8c61\u65b9\u6cd5\u7684\u62bd\u8c61\u7c7b\u3002\u867d\u7136\u5c11\u89c1\uff0c\u4f46\u6709\u65f6\u5019\u4f60\u53ea\u662f\u4e0d\u60f3\u8ba9\u522b\u4eba new<\/code> \u8fd9\u4e2a\u7c7b\uff0c\u53ef\u4ee5\u7528 abstract class<\/code> \u628a\u5b83\u5361\u4f4f\u3002\u6bd4\u5982 Java \u7684 HttpServlet<\/code> \u5c31\u662f\u4e00\u4e2a\u62bd\u8c61\u7c7b\uff0c\u5b83\u6240\u6709\u65b9\u6cd5\u90fd\u6709\u9ed8\u8ba4\u5b9e\u73b0\uff0c\u4f46\u5b83\u4e0d\u8ba9\u4f60 new\u2014\u2014\u5fc5\u987b\u7ee7\u627f\u91cd\u5199\u3002<\/p>\n\n\n\n
        Q4\uff1a\u62bd\u8c61\u7c7b\u80fd\u4e0d\u80fd\u5b9e\u73b0\u63a5\u53e3\uff1f<\/h3>\n\n\n\n
        \u80fd\uff01\u800c\u4e14\u63a5\u53e3\u7684\u62bd\u8c61\u65b9\u6cd5\u5728\u62bd\u8c61\u7c7b\u91cc\u53ef\u4ee5\u9009\u62e9\u6027\u5b9e\u73b0<\/strong>\u2014\u2014\u4e0d\u5b9e\u73b0\u7684\u7559\u7ed9\u5b50\u7c7b\u3002\u8fd9\u4e2a\u6211\u4eec\u5728\u8bb2\u63a5\u53e3\u7684\u65f6\u5019\u4f1a\u8be6\u7ec6\u804a\u5230\u3002<\/p>\n\n\n\n
        \n\n\n\n
        \u7ed3\u8bed<\/h2>\n\n\n\n
        \u8fd9\u7bc7\u6211\u4eec\u8bb2\u4e86\u62bd\u8c61\u7c7b\u4e0e\u62bd\u8c61\u65b9\u6cd5\u7684\u6838\u5fc3\u6982\u5ff5\u548c\u7528\u6cd5\u3002\u4e00\u53e5\u8bdd\u603b\u7ed3\uff1a\u62bd\u8c61\u7c7b\u662f\u4e00\u4efd\u300c\u534a\u6210\u54c1\u300d\u6a21\u677f\uff0c\u628a\u786e\u5b9a\u7684\u4e1c\u897f\u5199\u597d\uff0c\u628a\u4e0d\u786e\u5b9a\u7684\u4e1c\u897f\u7559\u7ed9\u5b50\u7c7b\u53bb\u586b\u5145\u3002<\/strong><\/p>\n\n\n\n
        \u4f46\u4f60\u6709\u6ca1\u6709\u6ce8\u610f\u5230\uff0c\u85aa\u8d44\u7cfb\u7edf\u91cc\u6709\u4e2a\u95ee\u9898\uff1a\u5b9e\u4e60\u751f\u5982\u679c\u8868\u73b0\u597d\uff0c\u662f\u4e0d\u662f\u53ef\u4ee5\u8f6c\u5168\u804c\uff1fJava \u7684\u7c7b\u53ea\u80fd\u5355\u7ee7\u627f\u2014\u2014Intern<\/code>\u4e00\u65e6\u7ee7\u627f\u4e86 Employee<\/code>\uff0c\u5c31\u4e0d\u80fd\u518d\u7ee7\u627f\u5176\u4ed6\u7c7b\u4e86\u3002\u5982\u679c\u300c\u8f6c\u5168\u804c\u300d\u9700\u8981\u628a Intern<\/code> \u5bf9\u8c61\u53d8\u6210 FullTimeEmployee<\/code>\uff0c\u90a3\u5c31\u5c34\u5c2c\u4e86\u3002<\/p>\n\n\n\n
        Java \u7684\u8bbe\u8ba1\u8005\u7528\u53e6\u4e00\u79cd\u8bed\u6cd5\u89e3\u51b3\u4e86\u8fd9\u4e2a\u95ee\u9898\u2014\u2014\u63a5\u53e3\uff08Interface\uff09<\/strong>\u3002\u4e0b\u4e00\u7bc7\u54b1\u4eec\u5c31\u804a\u804a\u63a5\u53e3\uff0c\u770b\u5b83\u8ddf\u62bd\u8c61\u7c7b\u6709\u4ec0\u4e48\u533a\u522b\u3001\u4ec0\u4e48\u65f6\u5019\u7528\u63a5\u53e3\u3001\u4ec0\u4e48\u65f6\u5019\u7528\u62bd\u8c61\u7c7b\u3002<\/p>\n\n\n\n
        \u4ee3\u7801\u5199\u591a\u4e86\u4f60\u81ea\u7136\u4f1a\u8bb0\u4f4f\u4e00\u53e5\u8bdd\uff1a\u300c\u62bd\u8c61\u7c7b\u662f is-a \u5173\u7cfb\uff0c\u63a5\u53e3\u662f can-do \u5173\u7cfb\u3002\u300d<\/strong>\u2014\u2014\u4e0b\u4e00\u7bc7\uff0c\u54b1\u4eec\u6765\u8bc1\u660e\u8fd9\u53e5\u8bdd\u3002<\/p>\n\n\n\n
        \u6211\u4eec\u4e0b\u4e00\u7bc7\u89c1 \ud83d\ude80<\/p>\n\n","protected":false},"excerpt":{"rendered":"
        \u7ee7\u627f\u5b66\u5b8c\u4e86\uff0c\u91cc\u6c0f\u66ff\u6362\u539f\u5219\u4e5f\u61c2\u4e86\u3002\u73b0\u5728\u95ee\u4e00\u4e2a\u95ee\u9898\uff1a\u5982\u679c\u7236\u7c7b\u4e2d\u6709\u4e00\u4e2a\u65b9\u6cd5\uff0c\u6bcf\u4e2a\u5b50\u7c7b\u7684\u5b9e\u73b0\u90fd\u4e0d\u4e00\u6837\uff0c\u90a3\u7236\u7c7b\u5199\u8fd9\u4e2a\u65b9\u6cd5 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[35,67],"tags":[],"class_list":["post-266","post","type-post","status-publish","format-standard","hentry","category-03-","category-03-abstract-class"],"_links":{"self":[{"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/posts\/266","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/comments?post=266"}],"version-history":[{"count":2,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/posts\/266\/revisions"}],"predecessor-version":[{"id":276,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/posts\/266\/revisions\/276"}],"wp:attachment":[{"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/media?parent=266"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/categories?post=266"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ssjava.xyz\/index.php\/wp-json\/wp\/v2\/tags?post=266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}