java - 无法在溢出的构造函数中默认参数

Question

我无法默认参数，我不知道如何使用(this)语句设置数组。我知道这听起来很愚蠢，但我从来没有用言语表达过。

package try_Constructor;

public class NewTry {

    private int[] point1;
    private int[] point2;
    private int[] point3;

    public NewTry(){

            this(0,0, 1,0, 1,1);
    }

    public NewTry(int[] point1){

        this(point1, 1,0, 1,1);
    }

    public NewTry(int[] point1, int[] point2){

        this(point1, point2, 1,1);
    }

        public NewTry(int[] point1,int[] point2,int[] point3){

            setPointsOfTry(point1, point2, point3);
        }

Answer 1

不要重新发明轮子。使用Point class 。另外，始终链接到下一个最具体的构造函数，而不是破坏链并跳到末尾。

然后...

private static final Point DEFAULT_POINT_1 = new Point(0, 0);
private static final Point DEFAULT_POINT_2 = new Point(1, 0);
private static final Point DEFAULT_POINT_3 = new Point(1, 1);

public NewTry() {
    this(DEFAULT_POINT_1);
}

public NewTry(Point point1) {
    this(point1, DEFAULT_POINT_2);
}

public NewTry(Point point1, Point point2) {
    this(point1, point2, DEFAULT_POINT_3);
}

public NewTry(Point point1, Point point2, Point point3) {
    this.point1 = point1;
    this.point2 = point2;
    this.point3 = point3;
}