获取一键单击的坐标

Question

I am using this class from Sedgewick and Wayne and I need to get the coordinates from a mouse click when it is pressed at the standard draw window. This class have a method boolean mousePressed that identifies when mouse is pressed and we can get the coordinates from a point when the mouse is pressed at that point. I've tried to modify the java code to do something similar for a mouse click:

public static boolean mouseClicked() {
    synchronized (mouseLock) {
        return mouseClicked;
    }
}

. . .

  public void mouseClicked(MouseEvent e) {
     synchronized (mouseLock) {
         mouseX = StdDraw.userX(e.getX());
         mouseY = StdDraw.userY(e.getY());
         mouseClicked = true;
     }
}

...

 public void mouseReleased(MouseEvent e) {
    synchronized (mouseLock) {
        mousePressed = false;
        mouseClicked = false;
    }
}

If I run the following program

public class test {

public static void main(String[] args) {
    while(true){
        if (StdDraw.mouseClicked()) {
            System.out.println("hello");
        }
    }
}

}

It keeps printing hello (so it means that mouseClicked is returning true. How can I make it stop? I've tried to set mouseClicked=false on released event, but didnt work. What am I doing wrong? First, I've tried to use mousePressed to get the point, but I couldn't use it to get two points.

Thanks!

Answer 1

You have to set the mouseClicked flag false after printing the value

while (true) {
        if (StdDraw.mouseClicked()) {
            System.out.println("hello");
            StdDraw.mouseClicked=false;
        }
    }