Thread: exchanging 2 Label locations with MouseListener and MouseMotionListen (Drag & Drop)

i have tried to make a Drag and Drop for type of Puzzle. Its my school project and im the only one who is stuck with this trouble ...


it doesnt exchange me the Location of the Labels .. with MouseListener ...

package proveproject;
import javax.swing.*;
import java.awt.*;;
import java.io.*;
import java.awt.event.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.util.*;
 
public class DPuzzle implements ActionListener{
    JFrame dpFrame;
    JLabel []lbl;
    JLabel []eastLbl;
    JButton solve;
    JComponent a,b;
    int X1,Y1,X2,Y2;
 
 
    DPuzzle(){
        dpFrame = new JFrame("PUZZLE");
        dpFrame.setDefaultCloseOperation(dpFrame.EXIT_ON_CLOSE);
        dpFrame.setBounds(50,50,1200,500);
        dpFrame.setLayout(new BorderLayout());
 
 
        JPanel centerPane = new JPanel();
        centerPane.setLayout(new GridLayout(3,8,3,3));
        JPanel southPane = new JPanel();
 
 
        //Aggiungo  le immagini
        ImageIcon []img;
        img = new ImageIcon[9];
        img[0] = new ImageIcon("1.jpg");
        img[1] = new ImageIcon("2.jpg");
        img[2] = new ImageIcon("3.jpg");
        img[3] = new ImageIcon("4.jpg");
        img[4] = new ImageIcon("5.jpg");
        img[5] = new ImageIcon("6.jpg");
        img[6] = new ImageIcon("7.jpg");
        img[7] = new ImageIcon("8.jpg");
        img[8] = new ImageIcon("9.jpg"); 
 
 
        //metto le immagini nelle label
        lbl = new JLabel[9];
        for (int i = 0; i < 9; i++) {
            lbl[i]= new JLabel("");
            lbl[i].addMouseMotionListener(new DragMouseAdapter());
            lbl[i].addMouseListener(new DragMouseAdapter());
        }
 
 
        lbl[0].setIcon(img[7]);
        lbl[1].setIcon(img[4]);
        lbl[2].setIcon(img[1]);
        lbl[3].setIcon(img[3]);
        lbl[4].setIcon(img[6]);
        lbl[5].setIcon(img[2]);
        lbl[6].setIcon(img[8]);
        lbl[7].setIcon(img[5]);
        lbl[8].setIcon(img[0]);
 
 
 
        //Finisco di mettere le label nel WestPane
 
 
        //Inizio mettere le immagini nelle Label East 
        ImageIcon whiteImg = new ImageIcon("whiteImg.jpg");
        eastLbl = new JLabel[9];
 
 
        for (int i = 0; i < 9; i++) {
            eastLbl[i] = new JLabel("");
            eastLbl[i].setIcon(whiteImg);
            eastLbl[i].addMouseMotionListener(new DragMouseAdapter());
            eastLbl[i].addMouseListener(new DragMouseAdapter());
        }
 
        //Fine Pannello Ovest
 
 
        //Creare pannello sud 
        solve = new JButton("Fatto");
        solve.addActionListener(this);
        southPane.add(solve);
 
 
 
 
        centerPane.add(lbl[0]);
        centerPane.add(lbl[1]);
        centerPane.add(lbl[2]);
        centerPane.add(new JLabel(""));
        centerPane.add(new JLabel(""));
        centerPane.add(eastLbl[0]);
        centerPane.add(eastLbl[1]);
        centerPane.add(eastLbl[2]);
        centerPane.add(lbl[3]);
        centerPane.add(lbl[4]);
        centerPane.add(lbl[5]);
        centerPane.add(new JLabel(""));
        centerPane.add(new JLabel(""));
        centerPane.add(eastLbl[3]);
        centerPane.add(eastLbl[4]);
        centerPane.add(eastLbl[5]);
        centerPane.add(lbl[6]);
        centerPane.add(lbl[7]);
        centerPane.add(lbl[8]);
        centerPane.add(new JLabel(""));
        centerPane.add(new JLabel(""));
        centerPane.add(eastLbl[6]);
        centerPane.add(eastLbl[7]);
        centerPane.add(eastLbl[8]);
 
 
        dpFrame.add(centerPane,BorderLayout.CENTER);
        dpFrame.add(southPane,BorderLayout.SOUTH);
        dpFrame.setVisible(true);
    }
 
    @Override
    public void actionPerformed(ActionEvent ae) {
 
    }
 
    //MouseListener
 
 
 
    //MouseMotionListener
    public class DragMouseAdapter implements MouseMotionListener,MouseListener{
 
        @Override
        public void mouseDragged(MouseEvent me) {
            a =(JComponent)me.getSource();
            X1 = a.getX();
            Y1 = a.getY();
        }
 
        @Override
        public void mouseMoved(MouseEvent me) {
 
        }
 
        @Override
        public void mouseClicked(MouseEvent me) {
            a.setLocation(X2, Y2);
            b.setLocation(X1, Y1);
        }
 
        @Override
        public void mousePressed(MouseEvent me) {
 
        }
        @Override
        public void mouseReleased(MouseEvent me) {
            b = (JComponent)me.getSource();
            X2 = b.getX();
            Y2 = b.getY();
        }
 
        @Override
        public void mouseEntered(MouseEvent me) {
            throw new UnsupportedOperationException("Not supported yet.");
        }
 
        @Override
        public void mouseExited(MouseEvent me) {
            throw new UnsupportedOperationException("Not supported yet.");
        }
    }
 
 
 
 
    public static void main(String[] args) {
        new DPuzzle();
    }
 
}

Is there anybody who can help me doing the exchange of the JLabels Location???

how can i do that ?
can you explain me with an example ?
sorry but im at start ...

i have done a thing like that .. but it doesnt works ..

 public class DragMouseAdapter implements MouseListener{
        JLabel templbl,lbl1,lbl2;
 
 
        @Override
        public void mouseClicked(MouseEvent me) {
        }
 
        @Override
        public void mousePressed(MouseEvent me) {
            //a =(JComponent)me.getSource();
            lbl1 = (JLabel)(JComponent)me.getSource();
        }
        @Override
        public void mouseReleased(MouseEvent me) {
            lbl2 = (JLabel)(JComponent)me.getSource();
 
            templbl.setIcon(lbl1.getIcon());
            lbl1.setIcon(lbl2.getIcon());
            lbl2.setIcon(templbl.getIcon());
        }
 
        @Override
        public void mouseEntered(MouseEvent me) {
            throw new UnsupportedOperationException("Not supported yet.");
        }
 
        @Override
        public void mouseExited(MouseEvent me) {
            throw new UnsupportedOperationException("Not supported yet.");
        }
    }

        @Override
        public void mouseEntered(MouseEvent me) {
            throw new UnsupportedOperationException("Not supported yet.");
        }
 
        @Override
        public void mouseExited(MouseEvent me) {
            throw new UnsupportedOperationException("Not supported yet.");
        }

I doubt you will ever get a mouse click if you throw an exception every time the mouse moves over top of the window you want to click.