ToString方法的重写，可以实现自我描述

class Apple
{
        private String color;
        private double weight;
        public Apple(){}
        public Apple(String color,double weight)
        {
                this.color = color;
                this.weight = weight;
        }
        public String toString()
        {
                //System.out.println("thecoloris:" + color,"theweightis:" +
                //              weight);
                return "theapplecoloris:" + color + "theweightis:" + weight;
        }
}
public class ToStringTest
{
        public static void main(String[] args)
        {
                Apple a = new Apple("red",23);
                System.out.println(a);//直接打印引用变量
        }
}

ToString方法的重写，可以实现自我描述,布布扣,bubuko.com