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Thread: awt cardlayout help

  1. #1
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    Question awt cardlayout help

    there is no good tourtals online for this here is my code + errors
     
        private void jButton5ActionPerformed(java.awt.event.ActionEvent evt) {
            CardLayout card = (CardLayout) Start_menue.getLayout();
            card.show(Start_menue, "Game_SinglePlayer");
        }


    run:
    Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: org.jdesktop.layout.GroupLayout cannot be cast to java.awt.CardLayout
    at NewJFrame.jButton5ActionPerformed(NewJFrame.java:3 08)
    at NewJFrame.access$300(NewJFrame.java:13)
    at NewJFrame$4.actionPerformed(NewJFrame.java:100)
    at javax.swing.AbstractButton.fireActionPerformed(Abs tractButton.java:2018)
    at javax.swing.AbstractButton$Handler.actionPerformed (AbstractButton.java:2341)
    at javax.swing.DefaultButtonModel.fireActionPerformed (DefaultButtonModel.java:402)
    at javax.swing.DefaultButtonModel.setPressed(DefaultB uttonModel.java:259)
    at javax.swing.plaf.basic.BasicButtonListener.mouseRe leased(BasicButtonListener.java:252)
    at java.awt.Component.processMouseEvent(Component.jav a:6505)
    at javax.swing.JComponent.processMouseEvent(JComponen t.java:3321)
    at java.awt.Component.processEvent(Component.java:627 0)
    at java.awt.Container.processEvent(Container.java:222 9)
    at java.awt.Component.dispatchEventImpl(Component.jav a:4861)
    at java.awt.Container.dispatchEventImpl(Container.jav a:2287)
    at java.awt.Component.dispatchEvent(Component.java:46 87)
    at java.awt.LightweightDispatcher.retargetMouseEvent( Container.java:4832)
    at java.awt.LightweightDispatcher.processMouseEvent(C ontainer.java:4492)
    at java.awt.LightweightDispatcher.dispatchEvent(Conta iner.java:4422)
    at java.awt.Container.dispatchEventImpl(Container.jav a:2273)
    at java.awt.Window.dispatchEventImpl(Window.java:2719 )
    at java.awt.Component.dispatchEvent(Component.java:46 87)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.j ava:713)
    at java.awt.EventQueue.access$000(EventQueue.java:104 )
    at java.awt.EventQueue$3.run(EventQueue.java:672)
    at java.awt.EventQueue$3.run(EventQueue.java:670)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPri vilege(ProtectionDomain.java:76)
    at java.security.ProtectionDomain$1.doIntersectionPri vilege(ProtectionDomain.java:87)
    at java.awt.EventQueue$4.run(EventQueue.java:686)
    at java.awt.EventQueue$4.run(EventQueue.java:684)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPri vilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java: 683)
    at java.awt.EventDispatchThread.pumpOneEventForFilter s(EventDispatchThread.java:244)
    at java.awt.EventDispatchThread.pumpEventsForFilter(E ventDispatchThread.java:163)
    at java.awt.EventDispatchThread.pumpEventsForHierarch y(EventDispatchThread.java:151)
    at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:147)
    at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:139)
    at java.awt.EventDispatchThread.run(EventDispatchThre ad.java:97)
    BUILD SUCCESSFUL (total time: 7 seconds)


    happens after i click the button to change jframes from the jpannle

    also im yousing netbeens 7.2.1 IDE
    Last edited by op117; August 28th, 2012 at 07:43 PM. Reason: more info


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: awt cardlayout help

    java.lang.ClassCastException: org.jdesktop.layout.GroupLayout cannot be cast to java.awt.CardLayout
    Why are you trying to cast what is returned by the getLayout() method to a CardLayout object?
    The method is returning a GroupLayout object.
    If you don't understand my answer, don't ignore it, ask a question.

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    Super Moderator curmudgeon's Avatar
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    Default Re: awt cardlayout help

    Quote Originally Posted by op117 View Post
    there is no good tourtals online for this
    I'm not sure where or how you looked, but there's a great tutorial right here: The CardLayout. In fact if you Google "CardLayout Tutorial" it's the first hit.

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    Default Re: awt cardlayout help

    Quote Originally Posted by curmudgeon View Post
    I'm not sure where or how you looked, but there's a great tutorial right here: The CardLayout. In fact if you Google "CardLayout Tutorial" it's the first hit.
    for netbeans it's different due to the code generation ect. cant find any thing on this for 7.2 version that is were im having trouble.

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    Default Re: awt cardlayout help

    this is what im converting to card layout..JavaApplication2.src.zip in a .zip file site up loader wood not let it be any outer way...

    there is all the .java files note no logic is done trying to get GUI working first and the logic code is easy.

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    Default Re: awt cardlayout help

    Please post the code with the problems here on the forum.
    If you don't understand my answer, don't ignore it, ask a question.

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