Hlep in deleting Componantes using Key event listeners.

Question

Hi All,
I am tring to write a GUI program. I am dragging componets from the left side of the panel to the right side of the panel. Everything works well as of now. But i am tring to delete the componets which i placed on the right side of the paenl using key stroke events. Can anyone tell how this can be done. I have like labels and textfield componeets.
Please help
Smitha

Answer 1

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.Border;
public class KeyDeletion extends JPanel {
    JComponent selectedComponent;
    public KeyDeletion(JFrame f) {
        setLayout(null);
        Dimension d = new Dimension(65,25);
        for(int j = 0; j < 4; j++) {
            JLabel label = new JLabel("label " + (j+1),
                                       JLabel.CENTER);
            label.setBorder(BorderFactory.createEtchedBorder());
            int x = 20 + j*(d.width + 25);
            int y = 20 + j*(d.height + 75);
            label.setBounds(x, y, d.width, d.height);
            add(label);
        addMouseListener(ma);
        registerKey(f);
    /** Press the "x" key to delete selected label. */
    private void registerKey(JFrame f) {
        JRootPane jrp = f.getRootPane();
        int c = JComponent.WHEN_IN_FOCUSED_WINDOW;
        jrp.getInputMap(c).put(KeyStroke.getKeyStroke("X"), "DELETE");
        jrp.getActionMap().put("DELETE", deleteAction);
    public static void main(String[] args) {
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        KeyDeletion panel = new KeyDeletion(f);
        f.add(panel);
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
    private MouseAdapter ma = new MouseAdapter() {
        Border etched = BorderFactory.createEtchedBorder();
        Border select = BorderFactory.createLineBorder(Color.red);
        JComponent lastSelection;
        public void mousePressed(MouseEvent e) {
            Point p = e.getPoint();
            Component[] c = getComponents();
            boolean haveSelection = false;
            for(int j = 0; j < c.length; j++) {
                Rectangle r = c[j].getBounds();
                if(r.contains(p)) {
                    setSelection(c[j]);
                    haveSelection = true;
                    break;
            if(!haveSelection && selectedComponent != null) {
                setSelection(null);
        private void setSelection(Component c) {
            selectedComponent = (JComponent)c;
            if(c != null)
                selectedComponent.setBorder(select);
            if(lastSelection != null)
                lastSelection.setBorder(etched);
            lastSelection = selectedComponent;
    private Action deleteAction = new AbstractAction() {
        public void actionPerformed(ActionEvent e) {
            if(selectedComponent != null) {
                remove(selectedComponent);
                selectedComponent = null;
                repaint();
}