java的this关键字

class point{
    int x;
    int y;
    point(int x,int y){
        this.x=x;//如果形参和属性名相同，为了区分开来，必须要在属性名前加this
        y=y;//若不加this,则其值还是默认定义的0
    }
}

public class This {
    public static void main(String[] args) {
        point p = new point(1,2);
        System.out.println("x的值为:"+p.x);
        System.out.println("y的值为:"+p.y);
    }
}