How to use an Applet with multiple-jars

Question

Hi everybody,
I would like to use an applet with multiple-jars.
ex:
<applet codebase="." archive="main.jar,Addon1.jar,Addon2.jar" code="Appl.class" id="MyTest" width="600" height="30">
     <param name = "MyParam" value = "1;2">
</applet>
An applet with :
-> 1 Main JAR
-> X Addon JARs (X : a parameter "PRM")
My main part knows the parameter "PRM" -> knows which addon to use
My question is, how do I use classes from addons, inside the main part (and vise-versa if possible) ?
Thanks in advance
Best regards

Answer 1

I try what you say :
=== HTML ===
<applet codebase="." archive="Main.jar,Addon1.jar" code="Test.Appli.class" id="MyTest"  width="600" height="30">
     <param name = "myPrm1" value = "1;2">
</applet>=== MAIN JAR ===
package retest;
interface InterfAddOn1 {
    public void AfficheTest1(String sStrTest);
public class Ctest {
    public Ctest() {}
    public void unTest(String sClassNameR) {
      String sClassName = "PackTestAddon.TestClass1";
      try {
          Object oObj = Class.forName(sClassName).newInstance();
          ((InterfAddOn1) oObj).AfficheTest1(" Hello World ");
      } catch (ClassNotFoundException ex1) {
          System.out.println("ERR Class not found");
      } catch (IllegalAccessException ex1) {
          System.out.println("ERR Illegal Access");
      } catch (InstantiationException ex1) {
          System.out.println("ERR Instantiation Exception");
}=== ADDON JAR ===
package PackTestAddon;
public interface InterfAddOn1 {
    public void AfficheTest1(String sStrTest);
package PackTestAddon;
public class TestClass1 implements InterfAddOn1 {
    public TestClass1() {}
    public void AfficheTest1(String sStrTest) {
      System.out.println("Test :"+sStrTest);
}I have this error :
Exception in thread "AWT-EventQueue-2" java.lang.ClassCastException: PackTestAddon.TestClass1
     at retest.Ctest.unTest(Ctest.java:58)
     at retest.Appli.actionPerformed(Appli.java:442)
     at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
     at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
     at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
     at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
     at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
     at java.awt.Component.processMouseEvent(Unknown Source)
     at javax.swing.JComponent.processMouseEvent(Unknown Source)
     at java.awt.Component.processEvent(Unknown Source)
     at java.awt.Container.processEvent(Unknown Source)
     at java.awt.Component.dispatchEventImpl(Unknown Source)
     at java.awt.Container.dispatchEventImpl(Unknown Source)
     at java.awt.Component.dispatchEvent(Unknown Source)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
     at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
     at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
     at java.awt.Container.dispatchEventImpl(Unknown Source)
     at java.awt.Component.dispatchEvent(Unknown Source)
     at java.awt.EventQueue.dispatchEvent(Unknown Source)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
     at java.awt.EventDispatchThread.run(Unknown Source)
I don't really know why ... =;o(
Helppppp ... Thanks in advance.