Java 重写 equals + toString 练习

package com.bytezreo.objectclass2;

/**
 * 
 * @Description   重写 equals  +  toString
 * @author  Bytezero·zhenglei!      Email:420498246@qq.com
 * @version
 * @date 2021年9月24日下午3:09:52
 * @
 *
 */
public class CircleTest {
    public static void main(String[] args) {
        
        Circle circle1 = new Circle(2.3);
        Circle circle2 = new Circle(2.31,"while",2.0);
        
        
        System.out.println("颜色是否相等："+circle1.getColor().equals(circle2.getColor()));
        
        System.out.println("半径是否相等："+circle1.equals(circle2));
        
        System.out.println(circle1);
        System.out.println(circle2.toString());
    
    }

}

package com.bytezreo.objectclass2;



public class Circle extends GeometricObject {
    
    private double radius;
    
    public Circle()
    {
        super();
        radius = 1.0;
        
//        color = "while";
//        weight = 1.0;
        
    }

    public Circle(double radius) {
        super();
        this.radius = radius;
    }
    
    
    public Circle(double radius,String  color,double weight) {
        super(color,weight);
        this.radius = radius;
    }

    public double getRadius() {
        return radius;
    }

    public void setRadius(double radius) {
        this.radius = radius;
    }
    
    //求圆的面积
    public double findAre() {
        return 3.14* radius *radius;
    }
    
    //比较半径是否相等
    @Override
    public boolean equals(Object obj) {
        
        if(this == obj) {
            return true;
        }
        
        if(obj instanceof Circle) {
            Circle c1 = (Circle)obj;
            return this.radius == c1.getRadius();
        }
        
        return false;
        
    }

    @Override
    public String toString() {
        return "Cirlcle [radius=" + radius + "]";
    }

    
    
}

package com.bytezreo.objectclass2;

public class GeometricObject {

    
    protected  String color;
    protected  double weight;
    
    
    
    public GeometricObject() {
         super();
         this.color = "while";
         this.weight = 1.0;
    }



    public GeometricObject(String color, double weight) {
        super();
        this.color = color;
        this.weight = weight;
    }



    public String getColor() {
        return color;
    }



    public void setColor(String color) {
        this.color = color;
    }



    public double getWeight() {
        return weight;
    }



    public void setWeight(double weight) {
        this.weight = weight;
    }
    
    
    
    
}