老师案例:

老师类:

• 属性:姓名,年龄,性别
• 行为:讲课

基础班老师:

• 属性:姓名,年龄,性别
• 行为:讲基础班课程

实验班老师:

• 属性:姓名,年龄,性别
• 行为:讲实验班课程

package com.itheima_2;
/*
 *  普通班老师，实验班老师
 * 
 *  共性：
 *      属性  姓名，年龄，性别
 *      行为  讲课，唱歌
 */
public class AbstractTest {
    public static void main(String[] args) {
        BasicTeacher bt = new BasicTeacher();
        bt.name = "张三";
        bt.teach();
        
        SuperTeacher st = new SuperTeacher();
        st.name = "李四";
        st.teach();
    }
}

abstract class Teacher {
    String name;//姓名
    int age;//年龄
    String gender;//性别
    
    //讲课
    public abstract void teach();
}

class BasicTeacher extends Teacher {

    @Override
    public void teach() {
        System.out.println(name + "讲普通班课程");
    }
}

class SuperTeacher extends Teacher {

    @Override
    public void teach() {
        System.out.println(name + "讲实验班课程");
    }
}