extends 继承

今天简单讲下extends 继承，二话不多说来个Demo

//Demo1   extends01.java

public class extends01 {
   public String name;
   public String sex;
   public int age;

}

//Demo2  extends02.java

public class extends02 extends extends01 {
   
public extends02(){

}
public extends02(String name,int age,String sex){
super.name = name;
super.age = age;
super.sex = sex;
}

public void introduce(){
System.out.println("姓名："+name+" "+"年龄："+age+" "+"性别："+sex);
}

}

//Demo03  extends03.java

public class extends03 {
    public static void main(String[] args) {
extends02 ext = new extends02("詹姆斯",32,"男");
ext.introduce();
}
}

//打印结果

姓名：詹姆斯 年龄：32 性别：男