java学习-多态

菜鸟教程实例Java 多态 | 菜鸟教程 (runoob.com)

代码：

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public class shili1{
    private String name;
    private String address;
    private int number;
    public shili1(String name,String address,int number){
        System.out.println("Employee 构造函数");
        this.name=name;
        this.address=address;
        this.number=number;
    }
    public void mailCheck(){
        System.out.println("邮寄支票给:"+this.name+"  "+this.address);
    }
    public String toString(){
        return name +"  "+address+"  "+number;
    }
    public String getName(){
        return name;
    }
    public String getAddress(){
        return address;
    }
    public void setAddress(String newAddress){
        address=newAddress;
    }
    public int getNumber(){
        return number;
    }
}

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public class Salary extends shili1{
    private double salary;
    public Salary(String name,String address,int number,double salary){
        super(name,address,number);
        setSalary(salary);
    }
    public void mailCheck(){
        System.out.println("Salsry类的mailCheck方法");
        System.out.println("邮寄支票给:"+getName()+",工资为:"+salary);
    }
    public double  getSalary(){
        return salary;
    }
    public void setSalary(double newSalary){
        if(newSalary>=0.0){
            salary=newSalary;
        }
    }
    public double computePay(){
        System.out.println("计算工资,付给:"+getName());
        return salary/52;
    }
}

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public class VirtuaDemo {
    public static void main(String[] args) {
        Salary s=new Salary("员工 A","北京",3,3600.00);
        shili1 e=new Salary("员工 B","上海",2,2400.00);
        System.out.println("使用Salary的引用调用mailCheck--");
        s.mailCheck();
        System.out.println("\n使用shili1的引用调用mailCheck--");
        e.mailCheck();
    }
}

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运行结果如下：

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Employee 构造函数
Employee 构造函数
使用Salary的引用调用mailCheck--
Salsry类的mailCheck方法
邮寄支票给:员工 A,工资为:3600.0

使用shili1的引用调用mailCheck--
Salsry类的mailCheck方法
邮寄支票给:员工 B,工资为:2400.0

进程已结束，退出代码为 0