11.13作业，继承与覆写AB类工人和学生类

//1、

package com.Hani;

class E{
    private F b=null;
    public void fun(){
        this.b=new F (this);
        this.b.fun();
    }
    public void print(){
        System.out.println("Hello World!!!");
    }
};
class F{
    private E a=null;
    public F(E a){
        this.a=a;
        }
    public void fun(){
        this.a.print();
    }
};

public class DemoThis {
    public static void main(String args[]){
        new E().fun();
    }

}
 

//2

package com.Hani;

abstract class A{
    public abstract void fun();
}
class B extends A{
    public void fun(){
        System.out.println("Hello World!");
    }
}
public class DemoAbstract{
    public static void main(String args[]){
        B b=new B();
        b.fun();
    }
    
}

//3.

package com.Hani;
abstract class C{
    private String name;
    public C(String name){
        this.name=name;
    }
    public String getName(){
        return this.name;
    }
    public abstract void fun();
};

class D extends C {
    public D(String name){
        super(name);
    }
    public void fun() {    
        System.out.println(super.getName());
    }    
};
public class DemoAbstrsct1 {
    public static void main(String args[]){
        D d=new D("爱豆鹿晗");
        d.fun();
    }

}

//4.

package com.Hani;

public abstract 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 Person(String name,int age){
        this.name=name;
        this.age=age;
    }
    public  Person(){
        super();
    }
    public String toString(){
        return "Person [name="+ name +",age="+ age +"]";
    }
    public abstract String speak();

}

package com.Hani;

public class Student extends Person{
    private float score;
    public Student(String name,int age,float score){
        super(name,age);
        this.setScore(score);
    }
    @Override
    public String speak() {
        return "学生说-->我的姓名："+super.getName()+" "+super.getAge()+"岁"+this.score+"分";
    }
    public float getScore(){
        return score;
    }
    public void setScore(float score){
        this.score=score;
    }
    

}

package com.Hani;

public class Worker extends Person{
    private float salary;
    public Worker(String name,int age,float salary){
        super(name,age);
        this.setSalary(salary);
    }
    private void setSalary(float salary2) {
        // TODO 自动生成的方法存根
        
    }
    @Override
    public String speak() {
        return "工人说-->我的姓名："+super.getName()+" "+super.getAge()+"岁"+this.salary+"元";
    }
    public float getScore(){
        return salary;
    }
    public void setScore(float salary){
        this.salary=salary;
    }
    

}

package com.Hani;

public class DemoStudentWorker {
    public static void main(String[] args){
        Person student=new Student("旺财",13,90.5f);
        Person worker=new Student("小强",31,7777.7f);
        print(student.speak());
        print(worker.speak());
    }
    private static void print(String speak){
        System.out.println(speak);
    }

}