Question

我如何制作一个无参数构造函数来创建（0，0）点？如在Java中的X和Y点？注意：我知道代码不完整，可能会有一些错误，请帮我构造一下在此先感谢

public class MyPoint {
public static void main(String[] args) {
private double X;
private double Y;
private String name;
public static int numberOfCreatedPoints;

MyPoint() {
X = 0;
Y = 0;
name = "center";
}

MyPoint (double XCoor, double YCoor, String pointName){
    X = xCoor;
    Y = yCoor;
    name = pointName;

public double getX() {
    return X;
}  

public double getY() {
        return Y;
    }

public String name() {
        return name;
    }
public static getNumberOfCreatedPoints() {

    }
 }
   }
}

Answer 1

您的课程应该看起来像这样：

public class MyPoint {
  private double X;
  private double Y;
  private String name;

  MyPoint() {
    X = 0;
    Y = 0;
    name = "center";
  }

  //getters and setters ...

  public static void main(String[] args) {
  }
}

如何创建一个构造函数并使其创建一个（0,0）点？

1 个答案: