第一個:
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public?class?Yaojing?{
protected?String?name;
protected?int?age;
protected?String?gender;
public?void?showBasicInfo()?{
System.out.println(toString());
}
public?void?eatTangSeng()?{
System.out.println("吃飽了");
}
@Override
public?String?toString()?{
return?"Yaojing?[name="?+?name?+?",?age="?+?age?+?",?gender="?+?gender?+?"]";
}
}
第二個類
public?class?Zhizhujing?extends?Yaojing?{
public?void?buildNet(){
System.out.println("蜘蛛在織網(wǎng)");
}
}
第三個類
public?class?Baigujing?extends?Yaojing?{
public?void?beBeauty(){
System.out.println("白骨精");
}
}
看看下面這個例子,就會明白了:JAVA中繼承可以實現(xiàn)代碼復用,
由于在父類中已經(jīng)定義的方法,被子類繼承以后,就可以使用,實現(xiàn)了代碼的復用
class Father{
private int moneyDollar=300;
int moneyHK=200;
int add(int x,int y){
return x+y;
}
}
class Son extends Father{
int moneyRMB=800;
public void changMoneyHK(int x){
moneyHK=x;
}
public void changMoneyRMB(int x){
moneyRMB=x;
}
int subs(int x,int y){
return x-y;
}
}
class GrandSon extends Son{
int multi(int x,int y){
return x*y;
}
}
public class Example5_1{
public static void main(String args[]){
int a=5,b=3;
Son son=new Son();
GrandSon sunzi=new GrandSon();
son.changMoneyHK(666);
son.changMoneyRMB(5000);
System.out.println("兒子的港幣是繼承的屬性,當前的值是:"+son.moneyHK);
System.out.println("兒子的人民幣是新增的屬性,當前的值是:"+son.moneyRMB);
System.out.printf("減法是兒子新增的功能,%d-%d等于%d\n",a,b,son.subs(a,b));
System.out.printf("加法是兒子繼承的功能,%d+%d等于%d\n",a,b,son.add(a,b));
System.out.println("孫子的港幣和人民幣都是繼承的屬性,,當前的值是:");
System.out.println("港幣:"+sunzi.moneyHK+" 人民幣:"+sunzi.moneyRMB);
System.out.printf("乘法是孫子新增的功能,%d*%d等于%d\n",a,b,sunzi.multi(a,b));
System.out.printf("加法是孫子繼承的功能,%d+%d等于%d\n",a,b,sunzi.add(a,b));
System.out.printf("減法是孫子繼承的功能,%d-%d等于%d\n",a,b,sunzi.subs(a,b));
}
}
我寫了一個,內(nèi)容比較簡單的。代碼如下: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;
}
}
可運行的:
import java.awt.*;
import java.awt.event.*;
public class BackJFrame extends Frame{
public BackJFrame(){
super("臺球");
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();
}
}
網(wǎng)站標題:提現(xiàn)繼承的java代碼 繼承 java
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