How do I get InputVerifier to work with an editable JComboBox

I've got an JComboBox with a custom inputVerifyer set to limit MaxLength when it's set to editable.

The verify method never seems to get called.

The same verifyer gets invoked on a JTextField fine.

What might I be doing wrong?

Thanks.

From stackoverflow Allain Lalonde

• Show us a small section of your code.

  package inputverifier;
  
  import javax.swing.*;
  
      class Go {
      public static void main(String[] args) {
          java.awt.EventQueue.invokeLater(new Runnable() { public void run() {
              runEDT();
          }});
      }
      private static void runEDT() {
          new JFrame("combo thing") {{
              setLayout(new java.awt.GridLayout(2, 1));
              add(new JComboBox() {{
                  setEditable(true);
                  setInputVerifier(new InputVerifier() {
                      @Override public boolean verify(JComponent input) {
                          System.err.println("Hi!");
                          return true;
                      }
                  });
              }});
              add(new JTextField());
              setDefaultCloseOperation(EXIT_ON_CLOSE);
              pack();
              setVisible(true);
          }};
      }    
  }
  

  Looks like it's a problem with JComboBox being a composite component. I'd suggest avoiding such nasty UI solutions.

  From Tom Hawtin - tackline

• I found a workaround. I thought I'd let the next person with this problem know about.

  Basically. Instead of setting the inputVerifier on the ComboBox you set it to it's "Editor Component".

  JComboBox combo = new JComboBox();
  JTextField tf = (JTextField)(combo.getEditor().getEditorComponent());
  tf.setInputVerifier(verifyer);
  

  From Allain Lalonde

• I wouldn't use the term workaround.

  Based on all the swing code I've seen from a bunch of different sources that looks to be the canonical solution.

  From shemnon