New entry in editable JComboBox

I have been looking through the forum to try and find an answer to this, but I can only find queries about positioning in an editable combo box. what i want to do is for a person to be able to select an item from a combo box, or enter a new item. is this possible?

JComboBox myComboBox = new JComboBox();
myComboBox.setEditable(true);
myComboBox.addItem("Hello");
myComboBox.addItem("There");
myComboBox.addActionListener(new java.awt.event.ActionListener() {
  public void actionPerformed(ActionEvent e) {
    if (myComboBox.getSelectedIndex()==-1) {
      myComboBox.addItem(myComboBox.getSelectedItem());
});

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    I added the following in your focusGained() method and it seemed to work:
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  • Editable JComboBox in a JTable

    I posted my problem into the "Java Essentials/Java programming" forum but it would be much better if I'd posted it here into the swing theme :).
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    Funky_1321
    Posts:8
    Registered: 2/22/06
    editable JComboBox in a JTable
    Oct 21, 2006 1:32 PM
    Click to email this message
    Hello!
    Yesterday I posted a problem, solved it and there's another one, referring the same theme.
    So it's about a editable JComboBox with autocomplete function. The combo is a JTables cellEditors component. So it's in a table. So when the user presses the enter key to select an item from the JComboBox drop down menu, I can't get which item is it, not even which index has the item in the list. If for exemple the JComboBox isn't in a table but is added on a JPanel, it works fine. So I want to get the selectedItem in the actionPerformed method implemented in the combo box. I always get null instead of the item.
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    Thanks, Tilen
    YAT_Archivist
    Posts:1,321
    Registered: 13/08/05
    Re: editable JComboBox in a JTable
    Oct 21, 2006 1:55 PM (reply 1 of 2)
    Click to email this message
    I suggest that you distill your current code into a simple class which has the following attributes:
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    Funky_1321
    Posts:8
    Registered: 2/22/06
    Re: editable JComboBox in a JTable
    Oct 21, 2006 2:11 PM (reply 2 of 2)
    Click to email this message
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    Okay look ... I couldn't write a shorter code just for an example. I thought that my problem could be understoodable just in mind. However ... type in the first combo box the letter "i" and then select some item from the list with pressing the enter key. Do the same in the 2nd combo box who's in the JTable ... the user just can't select that way if the same combo is in the JTable. Why? Thanks alot for future help!
    the code:
    import java.awt.event.KeyAdapter;
    import java.awt.event.KeyEvent;
    import java.awt.event.MouseAdapter;
    import java.awt.event.MouseEvent;
    import java.util.Vector;
    import javax.swing.DefaultCellEditor;
    import javax.swing.DefaultComboBoxModel;
    import javax.swing.JComboBox;
    import javax.swing.JFrame;
    import javax.swing.JScrollPane;
    import javax.swing.JTable;
    import javax.swing.JTextField;
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