java编写继承的代码,java编写继承的代码是什么

用Java继承和多态实现编写代码

代码如下：

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abstract class DongWu {

public abstract void info();

}

class Bird extends DongWu {

@Override

public void info() {

System.out.println("我是一只鸟。");

}

}

class Fish extends DongWu {

@Override

public void info() {

System.out.println("我是一条鱼。");

}

}

public class App5 {

public static void main(String[] args) {

DongWu bird = new Bird();

bird.info();

DongWu fish = new Fish();

fish.info();

}

}

java编写动物世界的继承关系代码

我写了一个，内容比较简单的。代码如下：public class AnimalTest {

Animal animal;

public void eat(Animal animal){

animal.eat();

}

public void walk(Animal animal){

animal.walk();

}

public static void main(String args[]){

Animal animal=new Animal("animal");

Wolf w=new Wolf("wolf");

Goat g=new Goat("goat");

AnimalTest at=new AnimalTest();

at.eat(animal);

at.eat(w);

at.eat(g);

at.walk(animal);

at.walk(w);

at.walk(g);

}

}

class Animal {

String name;

public Animal(String name){

this.name=name;

}

public Animal(){}

public void setName(String name){

this.name=name;

}

public String getName(){

return name;

}

public void eat(){

System.out.println("animal eat");

}

public void walk(){

System.out.println("animal walk");

}

public String toString(){

return name;

}

}class Wolf extends Animal {

public Wolf(String name){

super(name);

}

public Wolf(){}

public void eat(){

System.out.println("wolf eat meat");

}

public void walk(){

System.out.println("wolf walk");

}

public String toString(){

return name;

}

}class Goat extends Animal {

public Goat(String name){

super(name);

}

public Goat(){}

public void eat(){

System.out.println("goat eat grass");

}

public void walk(){

System.out.println("goat walk");

}

public String toString(){

return name;

}

}

写一个最简单的JAVA继承代码？？谢谢

可运行的：

import java.awt.*;

import java.awt.event.*;

public class BackJFrame extends Frame{

public BackJFrame(){

super("台球");

setSize(300,300);

setBackground(Color.cyan); //背景

setVisible(true);

addWindowListener(new WindowAdapter()

{

public void windowClosing (WindowEvent e)

{System.exit(0);}

} );

}

public static void main(String args[]){

new BackJFrame();

}

}