How to find final coordinates(x & y) of the objects position in JApplet and write them to a text file

Question

I am able to define,drag and remove the objects in JApplet. Please help me how to find the the final coordinates(x and y) of the objects position in JApplet and writing them to a text file. Please help me with this. Thanks in advance.

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.awt.geom.*;
import javax.swing.*;

This is my main class

public class MouseTest extends JApplet
{
    public void init()
    {
    EventQueue.invokeLater(new Runnable() {
        public void run()
        {
        MousePanel panel = new MousePanel();
        add(panel);
        }
    });
    }
   public static void main(String[] args)
   {
      EventQueue.invokeLater(new mainThread());
   }
}

class mainThread implements Runnable
{
    public void run()
    {
    JPanel panel = new MousePanel();
    JFrame frame = new JFrame("MouseTest");
    frame.add(panel);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(300,200);
    frame.setVisible(true);
    }
}

class MousePanel extends JPanel
{
   public MousePanel()
   {
      squares = new ArrayList<Rectangle2D>();
      current = null;

      addMouseListener(new MouseHandler());
      addMouseMotionListener(new MouseMotionHandler());
   }

   public void paintComponent(Graphics g)
   {
       super.paintComponent(g);

       Graphics2D g2 = (Graphics2D) g;

      // draw all squares
      for (Rectangle2D r : squares)
         g2.draw(r);
   }

   /**
    * Finds the first square containing a point.
    * @param p a point
    * @return the first square that contains p
    */
   public Rectangle2D find(Point2D p)
   {
      for (Rectangle2D r : squares)
      {
         if (r.contains(p)) return r;
      }
      return null;
   }

   /**
    * Adds a square to the collection.
    * @param p the center of the square
    */
   public void add(Point2D p)
   {
      double x = p.getX();
      double y = p.getY();

      current = new Rectangle2D.Double(x - SIDELENGTH / 2, y - SIDELENGTH / 2, SIDELENGTH,
            SIDELENGTH);
      squares.add(current);
      repaint();
   }

   /**
    * Removes a square from the collection.
    * @param s the square to remove
    */
   public void remove(Rectangle2D s)
   {
      if (s == null) return;
      if (s == current) current = null;
      squares.remove(s);
      repaint();
   }

   private static final int SIDELENGTH = 10;
   private ArrayList<Rectangle2D> squares;
   private Rectangle2D current;

   // the square containing the mouse cursor

these are methods for defining and dragging and removing the object

   private class MouseHandler extends MouseAdapter
   {

      public void mousePressed(MouseEvent event)
      {
         // add a new square if the cursor isn't inside a square
         current = find(event.getPoint());
         if (current == null) add(event.getPoint());
      }    
      public void mouseClicked(MouseEvent event)
      {
         // remove the current square if double clicked
         current = find(event.getPoint());
         if (current != null && event.getClickCount() >= 2) remove(current);
      }
   }

   private class MouseMotionHandler implements MouseMotionListener
   {
      public void mouseMoved(MouseEvent event)
      {
         // set the mouse cursor to cross hairs if it is inside
         // a rectangle

         if (find(event.getPoint()) == null) setCursor(Cursor.getDefaultCursor());
         else setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));
      } 
      public void mouseDragged(MouseEvent event)
      {
         if (current != null)
         {
            int x = event.getX();
            int y = event.getY();

            // drag the current rectangle to center it at (x, y)
            current.setFrame(x - SIDELENGTH / 2, y - SIDELENGTH / 2, SIDELENGTH, SIDELENGTH);
            repaint();
         }
      }
   }
}

Answer 1

i dont know how to determine when the user has finished dragging a component?

Finally an actual requirement.

Override the mouseReleased() method of your MouseListener.

Then in this code you get the location and write the location to a file.