public class Emp { //雇员类 private int empno; //雇员编号 private String ename; //雇员姓名 private String job; //雇员职

interface Fruit{ //定义一个接口 public void eat();}class Apple implements Fruit{ //实现接口 public void eat() { System.out.println("吃苹果"); }}class Orange implements Fruit

public class Test { public static void main(String[] args) { Computer c = new Computer(); c.plugin(new Phone()); c.plugin(new Print()); }}interface Usb{//定义接口 publ

public class Item { private int id; //主类编号 private String title; //主类名称 private Subitem subitem[]; //多个子类 public Item(

public class Person { private String name; //姓名 private int age; //年龄 public Person(String name,int age) { //构造方法 this.name = name;

public class Emp { //雇员类 private int id; //雇员编号 private String name; //雇员姓名

/** * 简单继承类 */public class Animal { //创建一个动物类 public void eat() { System.out.println("动物具有吃东西的能力"); } public static void main(String[] args) { Animal animal = new Dog

public class Book { private int id;//图书编号 private String name;//图书名称 private String category;//图书类别 public Book() {}//Book类无参构造方法 public Book(int id,String name,String category) {

public class Member { private int mid; private String name; private Car car; public Member() {} public Member(int mid,String name) { this.mid = mid; this.name = name

public class TestInterface {//测试接口类 public static void main(String[] args) { Fish myfish = new Fish("鱼");//实例化鱼对象 Sheep mysheep = new Sheep("山羊");//实例化山羊对象 Frog myfrog = new

public class Outer { //外部类 private String s = "Hello World"; //外部类的属性 class Inner{ //内部类 public void print() { System.out.println

public class Person { private String name; //属性封装 private int age; //属性封装 public Person() { //无参构造方法 } public Person(String name)

interface Network{ //定义Network接口 public void browse(); //定义抽象方法}class Real implements Network{ //真实的上网操作 public void browse() { //覆写抽象