[Java知识库]Java锐格实验3子类与继承

7173

分析 运用到了子类与父类的继承关系,子类使用父类的构造方法无聊又麻烦的题

import java.util.*;//这里有结束符
class Dog{
	String breed;
	int weight;
	String color;
	Dog(String breed,int weight,String color){
		this.breed=breed;
        this.weight=weight;
        this.color=color;
	}
	void show(){
	System.out.println("这是一只"+breed+"体重为"+weight+",颜色为"+color);
	}
}
class UnspottedDog extends Dog{
	UnspottedDog(String breed,int wegiht,String color){
        super( breed,wegiht,color);//super方法传变量不用声明变量类型
    }//子类的构造方法中第一句为父类的构造方法
	public  void show(){
        System.out.println("这是一只"+breed+"犬");
    }//隐藏父类方法
}
class  SpottedDog extends Dog{//注意可以使用super调用父类的构造方法 super是子类构造方法中的头一条语句
    String spotColor;
    SpottedDog(String breed,int wegiht,String color,String spotColor){
        super(breed,wegiht,color);
        this.spotColor=spotColor;
    }
    public void show(){
        System.out.println("这是一只"+breed+"体重为"+weight+",颜色为"+color
        );
        System.out.println("这是一只"+breed+",颜色为"+color+",斑点颜色为"+spotColor);
    }
}

public class Main {
    public static void main(String[] args) {
		String breed1,breed2;
		int weight1,weight2;
		String color1,color2;
		String spotColor;
		Scanner sc=new Scanner(System.in);
		breed1=sc.next();
        weight1=sc.nextInt();
        color1=sc.next();
        spotColor=sc.next();
        breed2=sc.next();
        weight2=sc.nextInt();
        color2=sc.next();
        SpottedDog d1=new SpottedDog(breed1,weight1,color1,spotColor);
        d1.show();
        UnspottedDog d2=new UnspottedDog(breed2,weight2,color2);
        d2.show();
		
	}
}

7174

跟上面一样的思路，建议熟悉了直接copy别人的，我就不传了

7175 后面的是接口和抽象类相关内容