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Editorial Team
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Asked: 2026-06-15T19:25:22+00:00

getContentPane().setLayout(new CardLayout()); CardLayout x = (CardLayout) getLayout(); I’m using Netbeans and in Design manager

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getContentPane().setLayout(new CardLayout());
CardLayout x = (CardLayout) getLayout();

I’m using Netbeans and in Design manager I chosed my JFrame contents as CardLayout. However I cannot make it work so far. I set the above code after the initComponenets call and still I have this error: 

java.awt.BorderLayout cannot be cast to java.awt.CardLayout

Somehow I have BorderLayout instead of CardLayout. How is it possible? I’ve just set layout as CardLayout. PS: my class extends javax.swing.JFrame.

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1 Answer

  1. Editorial Team

    You can use:

    CardLayout x = (CardLayout) getContentPane().getLayout();

    Similarly to switch card panels you can use:

    x.show(getContentPane(), "card2");

    This is not an issue if you simply use a separate JPanel as the ‘card’ container plus you get the added benefit of using the JFrame BorderLayout should you wish to add navigation buttons, say in the BorderLayout.SOUTH location.

    Essential reading for using CardLayout

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