Remove imageicon problem!!Please help!!

Question

Hi!I m trying to do this:When the delete button is pressed , remove the jlabels appeared by one, from the last one to the first one!!How can i do this?I tried to do it with icon.set(null) but they all dissapear!Thank you!
package icons;
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Icons extends Applet {
  JButton jButton1 = new JButton("a");
  JButton jButton2 = new JButton("b");
  JButton jButton3 = new JButton("c");
  JButton jButton4 = new JButton("d");
  JButton jButton5 = new JButton("e");
  JButton jButton6 = new JButton("f");
  JButton jButton7 = new JButton("g");
  JButton jButton8 = new JButton("compare");
  JButton jButton9 = new JButton("delete");
  FlowLayout flowLayout1 = new FlowLayout();
  JLabel jLabel1 = new JLabel();
  JLabel jLabel2 = new JLabel();
  JLabel jLabel3 = new JLabel();
  JLabel jLabel4 = new JLabel();
  JLabel jLabel5 = new JLabel();
  JLabel jLabel6 = new JLabel();
  JLabel jLabel7 = new JLabel();
String s=new String();
  int i =1;
  ImageIcon myIcon1 = new ImageIcon("eikones/image1.gif");
  ImageIcon myIcon2 = new ImageIcon("eikones/image2.gif");
  ImageIcon myIcon3= new ImageIcon("eikones/image3.gif");
  ImageIcon myIcon4= new ImageIcon("eikones/image4.gif");
  ImageIcon myIcon5  = new ImageIcon("eikones/image5.gif");
  ImageIcon myIcon6 = new ImageIcon("eikones/image6.gif");
  ImageIcon myIcon7 = new ImageIcon("eikones/image7.gif");
  public void init() {
    jButton1.setPreferredSize(new Dimension(150, 25));
    jButton1.setIcon(myIcon1);
    jButton1.addActionListener(new Icons_jButton1_actionAdapter(this));
     jButton2.setPreferredSize(new Dimension(150, 25));
    jButton2.setIcon(myIcon2);
    jButton2.addActionListener(new Icons_jButton2_actionAdapter(this));
    jButton3.setPreferredSize(new Dimension(150, 25));
    jButton3.setIcon(myIcon3);
    jButton3.addActionListener(new Icons_jButton3_actionAdapter(this));
    jButton4.addActionListener(new Icons_jButton4_actionAdapter(this));
    jButton4.setPreferredSize(new Dimension(150, 25));
    jButton4.setIcon(myIcon4);
    jButton5.addActionListener(new Icons_jButton5_actionAdapter(this));
    jButton5.setPreferredSize(new Dimension(150, 25));
    jButton5.setIcon(myIcon5);
    jButton6.setPreferredSize(new Dimension(150, 25));
    jButton6.setIcon(myIcon6);
    jButton6.addActionListener(new Icons_jButton6_actionAdapter(this));
    jButton7.setPreferredSize(new Dimension(150, 25));
    jButton7.setIcon(myIcon7);
    jButton7.addActionListener(new Icons_jButton7_actionAdapter(this));
    jButton8.setPreferredSize(new Dimension(150, 25));
    jButton8.addActionListener(new Icons_jButton8_actionAdapter(this));
    jButton9.setPreferredSize(new Dimension(150, 25));
    jButton9.addActionListener(new Icons_jButton9_actionAdapter(this));
    jLabel1.getIcon();
    jLabel2.getIcon();
    jLabel3.getIcon();
    jLabel4.getIcon();
    jLabel5.getIcon();
    jLabel6.getIcon();
    jLabel7.getIcon();
    add(jButton1);
    add(jButton2);
    add(jButton3);
    add(jButton4);
    add(jButton5);
    add(jButton6);
    add(jButton7);
    add(jButton8);
    add(jButton9);
    add(jLabel1);
    add(jLabel2);
    add(jLabel3);
    add(jLabel4);
    add(jLabel5);
    add(jLabel6);
    add(jLabel7);
      public Icons()
                this.setLayout(new FlowLayout(FlowLayout.LEFT));
  void jButton1_actionPerformed(ActionEvent e) {
   if (i==1)
      jLabel1.setIcon(myIcon1);
        else if (i==2)
     jLabel2.setIcon(myIcon1);
   else if (i==3)
      jLabel3.setIcon(myIcon1);
    else if (i==4)
        jLabel4.setIcon(myIcon1);
      else if (i==5)
        jLabel5.setIcon(myIcon1);
       else if (i==6)
        jLabel6.setIcon(myIcon1);
     else if (i==7)
     jLabel7.setIcon(myIcon1);
      s=s+jButton1.getText();
      i++;
  void jButton2_actionPerformed(ActionEvent e) {
    if (i==1)
      jLabel1.setIcon(myIcon2);
   else if (i==2)
     jLabel2.setIcon(myIcon2);
    else if (i==3)
     jLabel3.setIcon(myIcon2);
  else if (i==4)
        jLabel4.setIcon(myIcon2);
      else if (i==5)
         jLabel5.setIcon(myIcon2);
        else if (i==6)
         jLabel6.setIcon(myIcon2);
      else if (i==7)
      jLabel7.setIcon(myIcon2);
        s=s+jButton2.getText();
      i++;
  void jButton3_actionPerformed(ActionEvent e) {
    if (i==1)
     jLabel1.setIcon(myIcon3);
    else if (i==2)
      jLabel2.setIcon(myIcon3);
    else if (i==3)
      jLabel3.setIcon(myIcon3);
   else if (i==4)
    jLabel4.setIcon(myIcon3);
     else if (i==5)
        jLabel5.setIcon(myIcon3);
       else if (i==6)
        jLabel6.setIcon(myIcon3);
     else if (i==7)
      jLabel7.setIcon(myIcon3);
        s=s+jButton3.getText();
    i++;
  void jButton4_actionPerformed(ActionEvent e) {
   if (i==1)
    jLabel1.setIcon(myIcon4);
   else if (i==2)
     jLabel2.setIcon(myIcon4);
   else if (i==3)
      jLabel3.setIcon(myIcon4);
    else if (i==4)
        jLabel4.setIcon(myIcon4);
      else if (i==5)
        jLabel5.setIcon(myIcon4);
       else if (i==6)
        jLabel6.setIcon(myIcon4);
     else if (i==7)
      jLabel7.setIcon(myIcon4);
        s=s+jButton4.getText();
      i++;
  void jButton5_actionPerformed(ActionEvent e) {
    if (i==1)
      jLabel1.setIcon(myIcon5);
   else if (i==2)
     jLabel2.setIcon(myIcon5);
    else if (i==3)
     jLabel3.setIcon(myIcon5);
  else if (i==4)
        jLabel4.setIcon(myIcon5);
      else if (i==5)
         jLabel5.setIcon(myIcon5);
        else if (i==6)
         jLabel6.setIcon(myIcon5);
      else if (i==7)
      jLabel7.setIcon(myIcon5);
        s=s+jButton5.getText();
      i++;
  void jButton6_actionPerformed(ActionEvent e) {
    if (i==1)
     jLabel1.setIcon(myIcon6);
    else if (i==2)
      jLabel2.setIcon(myIcon6);
    else if (i==3)
      jLabel3.setIcon(myIcon6);
   else if (i==4)
    jLabel4.setIcon(myIcon6);
     else if (i==5)
        jLabel5.setIcon(myIcon6);
       else if (i==6)
        jLabel6.setIcon(myIcon6);
     else if (i==7)
      jLabel7.setIcon(myIcon6);
     s=s+jButton6.getText();
    i++;
  void jButton7_actionPerformed(ActionEvent e) {
   if (i==1)
    jLabel1.setIcon(myIcon7);
   else if (i==2)
     jLabel2.setIcon(myIcon7);
   else if (i==3)
      jLabel3.setIcon(myIcon7);
    else if (i==4)
        jLabel4.setIcon(myIcon7);
      else if (i==5)
        jLabel5.setIcon(myIcon7);
       else if (i==6)
        jLabel6.setIcon(myIcon7);
     else if (i==7)
      jLabel7.setIcon(myIcon7);
       s=s+jButton7.getText();
      i++;
  void jButton8_actionPerformed(ActionEvent e) {
  void jButton9_actionPerformed(ActionEvent e) {
      s="";
  jLabel4.setText(null);
i=1;
class Icons_jButton1_actionAdapter implements java.awt.event.ActionListener {
  Icons adaptee;
  Icons_jButton1_actionAdapter(Icons adaptee) {
    this.adaptee = adaptee;
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton1_actionPerformed(e);
class Icons_jButton2_actionAdapter implements java.awt.event.ActionListener {
  Icons adaptee;
  Icons_jButton2_actionAdapter(Icons adaptee) {
    this.adaptee = adaptee;
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton2_actionPerformed(e);
class Icons_jButton3_actionAdapter implements java.awt.event.ActionListener {
  Icons adaptee;
  Icons_jButton3_actionAdapter(Icons adaptee) {
    this.adaptee = adaptee;
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton3_actionPerformed(e);
class Icons_jButton4_actionAdapter implements java.awt.event.ActionListener {
  Icons adaptee;
  Icons_jButton4_actionAdapter(Icons adaptee) {
    this.adaptee = adaptee;
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton4_actionPerformed(e);
class Icons_jButton5_actionAdapter implements java.awt.event.ActionListener {
  Icons adaptee;
  Icons_jButton5_actionAdapter(Icons adaptee) {
    this.adaptee = adaptee;
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton5_actionPerformed(e);
class Icons_jButton6_actionAdapter implements java.awt.event.ActionListener {
  Icons adaptee;
  Icons_jButton6_actionAdapter(Icons adaptee) {
    this.adaptee = adaptee;
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton6_actionPerformed(e);
class Icons_jButton7_actionAdapter implements java.awt.event.ActionListener {
  Icons adaptee;
  Icons_jButton7_actionAdapter(Icons adaptee) {
    this.adaptee = adaptee;
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton7_actionPerformed(e);
class Icons_jButton8_actionAdapter implements java.awt.event.ActionListener {
  Icons adaptee;
  Icons_jButton8_actionAdapter(Icons adaptee) {
    this.adaptee = adaptee;
  public void actionPerformed(ActionEvent e) {
    Graphics g = getGraphics();
    if(s.equals("a"+"b"+"b"+"e"))
       g.drawString("ok",350,300);
          else
       g.drawString("wrong",150,300);
    adaptee.jButton8_actionPerformed(e);
class Icons_jButton9_actionAdapter implements java.awt.event.ActionListener {
  Icons adaptee;
  Icons_jButton9_actionAdapter(Icons adaptee) {
    this.adaptee = adaptee;
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton9_actionPerformed(e);
public void paint(Graphics g){
  g.setColor (back);
   g.fillRect (0,0,300,250);
   g.setColor (back1);
   g.fillRect (0,250,100,50);
  super.paint(g);
}

Answer 1

I don't really understand what you are trying to do but it is easier to write a single listener for all your buttons with code something like the following:
ActionListener listener = new ActionListener()
    public void actionPerformed(ActionEvent e)
        JButton button = (JButton)e.getSource();
        String command = button.getActionCommand();
        if ("a".equals( command ))
            jLabel1.setIcon( null );
        else if ("b".equals( command ) )
            jLabel2.setIcon( null );
};Another option would be to store you buttons and labels in an array. Then you would search the button array to find the index of the button clicked. Once you know this index then you can reset the label at the same index.