Find X Y Coordinates Mouse Cursor Location

A similar program is available in frame – Finding x and y Coordinates of Mouse Position. The same frame program is converted to applet. Following is the example. The mouse cursor location in x and y Coordinates and the type of action are displayed on the applet window and also on the applet status bar.

To locate the cursor, the MouseEvent class defines two methods getX() and getY() that return x and y coordinates position of mouse action.

Let us see what Java API says about these methods

• int getX(): Returns the horizontal x position of the event relative to the source component.
• int getY(): Returns the vertical y position of the event relative to the source component.

Two listeners MouseListener and MouseMotionListener are added to applet and overridden total 7 abstract methods.

HTML file to call the applet, AppletMouseXY.

Java Program, File Name: AppletMouseXY.java

import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;

public class AppletMouseXY extends Applet implements MouseListener, MouseMotionListener
{
  int x, y;
  String str="";
  public void init()
  {
    addMouseListener(this);
    addMouseMotionListener(this);
  }
                                    // override ML 5 abstract methods
  public void mousePressed(MouseEvent e)
  {
    x = e.getX();
    y = e.getY();
    str = "Mouse Pressed";
    repaint();
  }
  public void mouseReleased(MouseEvent e)
  {
    x = e.getX();
    y = e.getY();
    str = "Mouse Released";
    repaint();
   }
   public void mouseClicked(MouseEvent e)
   {
     x = e.getX();
     y = e.getY();
     str = "Mouse Clicked";
     repaint();
   }
   public void mouseEntered(MouseEvent e)
   {
     x = e.getX();
     y = e.getY();
     str = "Mouse Entered";
     repaint();
   }
   public void mouseExited(MouseEvent e)
   {
     x = e.getX();
     y = e.getY();
     str = "Mouse Exited";
     repaint();
   }
                                    // override two abstract methods of MouseMotionListener
   public void mouseMoved(MouseEvent e)
   {
     x = e.getX();
     y = e.getY();
     str = "Mouse Moved";
     repaint();
   }
   public void mouseDragged(MouseEvent e)
   {
     x = e.getX();
     y = e.getY();
     str = "Mouse dragged";
     repaint();
   }
                                    // called by repaint() method
   public void paint(Graphics g)
   {
     g.setFont(new Font("Monospaced", Font.BOLD, 20));
     g.fillOval(x, y, 10, 10);
     g.drawString(x + "," + y,  x+10, y -10);
     g.drawString(str, x+10, y+20);
     showStatus(str + " at " + x + "," + y);
   }
}

addMouseListener(this);
addMouseMotionListener(this);

Two listeners MouseListener and MouseMotionListener are added to applet so that these two listener interfaces can handle the events generated by mouse on the applet window.

x = e.getX();
y = e.getY();

The getX() and getY() methods of MouseEvent returns the x and y coordinates of where the mouse action took place.

showStatus(str + ” at ” + x + “,” + y);

repaint() method calls implicitly paint() method. Calling paint() methods directly raises compilation error. Why?

showStatus(String message) of Applet class displays the message on the status bar of the applet window. See the output screen.

Output screen with x and y coordinates when mouse is moved.

Output screen of Find X Y Coordinates Mouse Cursor Location