this关键字的构造方法的使用

package com.wh.Object3;

public class this_Demo {
    private String name;
    private double price;
    private int num;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }

    public int getNum() {
        return num;
    }

    public void setNum(int num) {
        this.num = num;
    }

    public this_Demo() {
        //this关键字的构造方法的使用 
        this("可乐", 2.5, 1001);
    }

    public this_Demo(String name, double price, int num) {
        this.name = name;
        this.price = price;
        this.num = num;
    }

    public static void main(String[] args) {
        /*
         * this("","",""); 代表一个构造方法
         */
        this_Demo th=new this_Demo();
        System.out.println(th.getName());
        System.out.println(th.getPrice());
        System.out.println(th.getNum());
    }
}