package  mypack;


 import  javax.swing.*;
 import  java.awt.*;
 import  java.applet.*;

 public   class  Test  extends  Applet {
   private   boolean  isStandalone = false;
   private  JButton jButton1 =  new  JButton();
 
  //Construct the applet
   public  Test() {
  }
  //Initialize the applet
   public   void  init() {
     try  {
      jbInit();
    }
     catch (Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
   private   void  jbInit()  throws  Exception {
    jButton1.setText("jButton1");
     this .add(jButton1,  null );
  }
  //Get Applet information
   public  String getAppletInfo() {
     return  "Applet Information";
  }
  //Get parameter info
   public  String[][] getParameterInfo() {
     return   null ;
  }
}

<applet width="300" height="300" code= "C:/APP_FR/MYPACK/classes/mypack/Test.class">
     </applet>

load:  class  C:/APP_FR/MYPACK/classes/mypack/Test. class  not found.
java.lang.ClassNotFoundException: C:.APP_FR.MYPACK.classes.mypack.Test. class 
	at sun.applet.AppletClassLoader.findClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at sun.applet.AppletClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at sun.applet.AppletClassLoader.loadCode(Unknown Source)
	at sun.applet.AppletPanel.createApplet(Unknown Source)
	at sun.plugin.AppletViewer.createApplet(Unknown Source)
	at sun.applet.AppletPanel.runLoader(Unknown Source)
	at sun.applet.AppletPanel.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.net.MalformedURLException: unknown protocol: c
	at java.net.URL.<init>(Unknown Source)
	at java.net.URL.<init>(Unknown Source)
	at sun.applet.AppletClassLoader$ 1 .run(Unknown Source)
	at java.security.AccessController.doPrivileged( Native  Method)
	...  10  more