Check Images in Java Applet Example

import java.awt.*; 
 import javax.swing.*; 
 import java.awt.event.*; 
 /*<APPLET CODE=CheckImagesInJavaAppletSwing.class WIDTH=350 HEIGHT=210> </APPLET>*/ 
 public class CheckImagesInJavaAppletSwing extends JApplet implements ItemListener 
   { 
       JCheckBox ChkOne; 
       JTextField Txt; 
       public void init() 
        { 
          Container cntnr = getContentPane(); 
          cntnr.setLayout(new FlowLayout()); 
          ChkOne = new JCheckBox("Check For Image", new ImageIcon("Java.jpg")); 
          ChkOne.setSelectedIcon(new ImageIcon("Koala.jpg")); 
          ChkOne.addItemListener(this); 
          cntnr.add(ChkOne); 
          Txt = new JTextField(25); 
          cntnr.add(Txt); 
       } 
          public void itemStateChanged(ItemEvent e1) 
          { 
             if (e1.getItemSelectable() == ChkOne) 
                { 
                  Txt.setText("You Clicked For The Next Image"); 
                } 
          } 
   }