新人笔记-final

package com_black.final00;

public class Demo {
    public static void main(String[] args) {
        zi z=new zi();
        z.method();
        z.show();
    }
}


package com_black.final00;
//当写为public  final class fu    此类不可被继承
public  class fu {
    public final void method(){//此方法不可被重写
        System.out.println("fu method");
    }
}



package com_black.final00;

public class zi extends fu{
   /* @Override
    public void method(){
        System.out.println("zi method");
    }
    */
    public final int age=30;
    public void show(){
        //age=100;    之前用final修饰后会报错
        System.out.println(age);
    }
}