title: Opening an applet from a frame button click
body: <p>I have a button inside an frame. On the click of the button, applet should load in another frame. These exceptions are coming up. defg is my applet class. Is there some other way to do it. Thanks.</p>
  
  <pre><code>     private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
      // TODO add your handling code here:
       JApplet applet = new defg();
  
       // Send the applet an init() message.
       applet.init();
  
       // Construct a JFrame.
       final JFrame frame =
               new JFrame("FrameTitle");
  
       // Transfer the applet's context pane to the JFrame.
       frame.setContentPane(applet.getContentPane());
  
       // Transfer the applet's menu bar into the JFrame.
       // This line can be omitted if the applet
       // does not create a menu bar.
       frame.setJMenuBar(applet.getJMenuBar());
  
       // Make the application shut down when the user clicks
       // on the close button.
       frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  
       // Set the size of the frame.
       // To pack the frame as tightly as possible
       // replace the setSize() message with the following.
       // frame.pack();
       frame.setSize(800, 800);
  
       // Set the location of the frame.
       frame.setLocation(30, 30);
  
       // Show the frame.
       frame.setVisible(true);
  
  
  
  }  
  </code></pre>
  
  <p>The exception...</p>
  
  <pre><code>  Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
  at defg.init(defg.java:198)
  at AppMain1.jButton1ActionPerformed(AppMain1.java:80)
  at AppMain1.access$0(AppMain1.java:75)
  at AppMain1$1.actionPerformed(AppMain1.java:40)
  at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
  at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
  at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
  at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
  at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
  at java.awt.Component.processMouseEvent(Component.java:6505)
  at javax.swing.JComponent.processMouseEvent(JComponent.java:3320)
  at java.awt.Component.processEvent(Component.java:6270)
  at java.awt.Container.processEvent(Container.java:2229)
  at java.awt.Component.dispatchEventImpl(Component.java:4861)
  at java.awt.Container.dispatchEventImpl(Container.java:2287)
  at java.awt.Component.dispatchEvent(Component.java:4687)
  at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
  at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
  at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
  at java.awt.Container.dispatchEventImpl(Container.java:2273)
  at java.awt.Window.dispatchEventImpl(Window.java:2719)
  at java.awt.Component.dispatchEvent(Component.java:4687)
  at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)
  at java.awt.EventQueue.access$200(EventQueue.java:103)
  at java.awt.EventQueue$3.run(EventQueue.java:694)
  at java.awt.EventQueue$3.run(EventQueue.java:692)
  at java.security.AccessController.doPrivileged(Native Method)
  at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
  at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
  at java.awt.EventQueue$4.run(EventQueue.java:708)
  at java.awt.EventQueue$4.run(EventQueue.java:706)
  at java.security.AccessController.doPrivileged(Native Method)
  at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
  at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
  at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
  at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
  at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
  at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
  at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
  at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
  </code></pre>