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POMake a textfield visible on itemStatechanged event of a checkbox
 

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    <p>How to make a text field visible on <code>itemStatechanged</code> event of a check box in Swing?</p> <p>I am trying to create a frame with a check box and a text field. I want the text field to be displayed only when the check box is selected. So when I initialize the components, I have set the <code>textfield.setvisible</code> to <code>false</code> and for the check box added a <code>addItemListener</code> and call the <code>itemStateChanged</code> event and there is the check box is selected, I set the <code>setVisible</code> method to <code>true</code>. </p> <p>My SSCCE looks like:</p> <pre><code>package ui; public class Evaluator extends javax.swing.JFrame { public Evaluator() { initComponents(); } private void initComponents() { jCheckBox1 = new javax.swing.JCheckBox(); jTextField1 = new javax.swing.JTextField(); jTextField1.setVisible(false); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE); setPreferredSize(new java.awt.Dimension(800, 800)); jCheckBox1.setFont(new java.awt.Font("Tahoma", 0, 14)); jCheckBox1.setText("Properties"); jCheckBox1.addItemListener(new java.awt.event.ItemListener() { public void itemStateChanged(java.awt.event.ItemEvent evt) { jCheckBox1ItemStateChanged(evt); } }); jTextField1.setFont(new java.awt.Font("Tahoma", 0, 14)); javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane()); getContentPane().setLayout(layout); layout.setHorizontalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(layout.createSequentialGroup() .addContainerGap() .addComponent(jCheckBox1) .addGap(41, 41, 41) .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 109, javax.swing.GroupLayout.PREFERRED_SIZE) .addContainerGap(155, Short.MAX_VALUE)) ); layout.setVerticalGroup( layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING) .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup() .addContainerGap(229, Short.MAX_VALUE) .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE) .addComponent(jCheckBox1) .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 37, javax.swing.GroupLayout.PREFERRED_SIZE)) .addGap(34, 34, 34)) ); pack(); } private void jCheckBox1ItemStateChanged(java.awt.event.ItemEvent evt) { // TODO add your handling code here: if(evt.getStateChange()== java.awt.event.ItemEvent.SELECTED){ jTextField1.setVisible(true); } } public static void main(String args[]) { try { for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) { if ("Nimbus".equals(info.getName())) { javax.swing.UIManager.setLookAndFeel(info.getClassName()); break; } } } catch (ClassNotFoundException ex) { java.util.logging.Logger.getLogger(Evaluator.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (InstantiationException ex) { java.util.logging.Logger.getLogger(Evaluator.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (IllegalAccessException ex) { java.util.logging.Logger.getLogger(Evaluator.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } catch (javax.swing.UnsupportedLookAndFeelException ex) { java.util.logging.Logger.getLogger(Evaluator.class.getName()).log(java.util.logging.Level.SEVERE, null, ex); } java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new Evaluator().setVisible(true); } }); } private javax.swing.JCheckBox jCheckBox1; private javax.swing.JTextField jTextField1; } </code></pre>
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    1. COtouched one of official bug :-)
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      1. USmKorbel
    2. CO1) For this case, use a [`CardLayout`](http://docs.oracle.com/javase/7/docs/api/java/awt/CardLayout.html) as see in this [short example](http://stackoverflow.com/a/5786005/418556). Put a `JPanel` with nothing in the first card, and the `JTextField` in the second card. 2) For better help sooner, post an [SSCCE](http://sscce.org/).
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      1. USAndrew Thompson
    3. COI don't know exactly, but have you tried to validate() and repaint() the Panel/Frame?
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      1. USMarcel Höll
 

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