构造器重载之简写

this

public class Apple
{
    public String name;
    public String color;
    public double weight;
    public Apple(){}
    // 两个参数的构造器
    public Apple(String name , String color)
    {
        this.name = name;
        this.color = color;
    }
    // 三个参数的构造器
    public Apple(String name , String color , double weight)
    {
        // 通过this调用另一个重载的构造器的初始化代码
        this(name , color);
        // 下面this引用该构造器正在初始化的Java对象
        this.weight = weight;
    }
}

 

简写