java方法重写override_子类重写父类方法

【1】重写：子类重写父类的方法
【2】格式要求：
（1）必须相同的：方法名、参数列表
（2）可以不同的（有限制条件、尽量一致）：返回值、修饰符

package com.msb;

import javax.sound.midi.Soundbank;

/**
 * @Author: nini
 * @Date:2021/6/26-06-26-14:57
 * @Description:TestJavaSE
 * @version:1.0
 */
public class Test1 {
    public static void main(String[] args) {
        Teacher t = new Teacher();
        t.setSdo("qa");
        t.setAge(10);

        System.out.println(t.getSdo()+t.getAge());
        t.tea();
        t.say();
    }
}
class Person{
    private int age;

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public void say(){
        System.out.println("this is Person");
    }
}

class Teacher extends Person{
    private String sdo;

    public String getSdo() {
        return sdo;
    }

    public void setSdo(String sdo) {
        this.sdo = sdo;
    }
    public void tea(){
        System.out.println("this is teacher");
    }

    @Override
    public void say() {
        System.out.println("this this teacher");
    }
}