继承、重载、多态
来源:互联网 发布:苹果映客主播笑声软件 编辑:程序博客网 时间:2024/05/16 09:57
1、重载
package iji;
class person{private String name;
private int age;
public person(){
}
public person(int age){
this.age= age;
}
public person(String name,int age){
this.name= name;
this.age= age;
}
public void show1(){
System.out.println("无");
}
public void show2(){
System.out.println("age:"+age);
}
public void show3(){
System.out.println("name:"+name+"\t"+"age:"+age);
}
}
public class Demo {
public static void main(String[] args) {
// TODO Auto-generated method stub
person d= new person ();
d.show1();
person d1=new person(15);
d1.show2();
person d3= new person("xiaoli",16);
d3.show3();
}
}
2、继承
class person{
private String name;
private int age;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age ;
}
public void setAge(int age) {
this.age = age;
}
public void show(){
System.out.println("name:"+name+"\t"+"age="+age);
}
}
class Student extends person{
private int score;
public int getScore() {
return score;
}
public void setScore(int score) {
this.score = score;
}
public void show(){
super.show();
System.out.println("score:"+score);
}
}
public class JiCheng {
public static void main(String[] args) {
// TODO Auto-generated method stub
Student s= new Student();
s.setAge(16);
s.setName("xiaowang");
s.setScore(95);
s.show();
}
}
3、多态
package day0901;
abstract class Animal{
private String name;
private int age;
abstract public void eat();
}
class cat extends Animal{
public void eat(){
System.out.println("吃鱼");
}
}
class dog extends Animal{
public void eat(){
System.out.println("啃骨头");
}
}
public class duotaidemo {
public static void main(String[] args) {
// TODO Auto-generated method stub
cat a=new cat();
cat a1=new cat();
cat a2=new cat();
function (a);
function (a1);
function (a2);
dog b=new dog();
dog b1=new dog();
function (b);
function (b1);
}
public static void function(Animal a){
a.eat();
}
}
- 继承,多态,重载
- 【insigma】继承、重载、多态
- 继承、重载、覆盖、多态
- 继承,封装,多态,重载
- 继承、重载、多态
- 继承,多态,重写,重载
- 继承、重载、多态
- java 重载、继承、多态
- 重写、重载、继承、多态
- 继承,重载,多态
- 基本概念继承,封装,多态,重载
- 继承、多态、重载和重写
- 继承、多态、重载和重写
- 继承、多态、重载和重写
- java-重载、重写、继承、多态
- 继承 多态 重载 重写----杂谈
- 继承、多态、重载和重写
- 关于封装、继承、多态、重载
- ZOJ2388解题报告
- spring的scope讲解
- 使用hmailserver搭建邮件服务器
- HDFS简易客户端实例
- 立贴为誓
- 继承、重载、多态
- BHO浏览器辅助对象
- Class使用方式
- 10分钟学会Git教程 - 安装Git、建仓库、添加和推送文件至库
- git 使用说明
- 韩顺平 java 第一讲 内容介绍,项目演示,原理剖析
- 【Leetcode】Set matrix zeros
- C宏高级应用之##/#
- QT显示图片