Pg188-3 构造方法

package org.hanqi.array;

public class Father {
    
    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 Father()
//    {
//        System.out.println("父类的构造方法");
//    }
    public Father(String name)
    {
        this.name=name;
        
        System.out.println("父类的有参的构造方法");
    }
    
    public void work()
    {
        System.out.println("我劳动我光荣");
    }

}

package org.hanqi.array;

public class Son extends Father {

    public Son()
    {
        super("儿子");
        
        System.out.println("子类的构造方法");
    }
    
    public void work()
    {
        super.work();
        
        System.out.println("我边上班边练歌");
    }

}

package org.hanqi.array;

public class TestJiCheng {

    public static void main(String[] args) {


        Father f=new Father("父亲");
        
        //f.setName("父亲");
                
        f.setAge(50);
        
        System.out.println("名字是："+f.getName()+" 年龄是："+f.getAge());
        
        f.work();
        
        System.out.println();
        
        Son s=new Son();
        
        //s.setName("儿子");
        
        s.setAge(20);
        
        System.out.println("名字是："+s.getName()+" 年龄是："+s.getAge());
        
        s.work();
    
    }

}

总结：构造子类时需要先构造父类，当需要调用父类的被覆盖的成员时，可以用super关键字调用