为什么我输出cat1 cat2 cat3 就会输出toString里的内容
import java.awt.Color;java
public class Cfc1
{
public static void main(String args[])
{
Cat cat1=new Cat("Java",12,21,Color.black);
Cat cat2=new Cat("C++",12,21,Color.white);
Cat cat3=new Cat("Java",12,21,Color.black);
System.out.println("猫咪1号:"+cat1);//为什么我输出cat1 cat2 cat3 就会输出toString里的内容
System.out.println("猫咪2号:"+cat2);//为什么我输出cat1 cat2 cat3 就会输出toString里的内容
System.out.println("猫咪3号:"+cat3);//为什么我输出cat1 cat2 cat3 就会输出toString里的内容
}
}
class Cat
{
private String name;
private int age;
private double weight;
private Color color;
public Cat(String name,int age,double weight,Color color)
{
this.name=name;
this.age=age;
this.weight=weight;
this.color=color;
}
public boolean equals(Cat cat)
{
if(this==cat)
{
return true;
}
else
{
return false;
}
}
public String toString()
{
StringBuffer sb=new StringBuffer();
sb.append("name="+name+"\n");
sb.append("age="+age+"\n");
sb.append("weight="+weight+"\n");
sb.append("Color="+color+"\n");
return sb.toString();
}
}
