Change background color editable JComboBox

Question

I am programming an editable combobox in a JFrame Form, but i want to change te background color.

How the program works: If i click the button \"press\", then the co

Answer 1

It works for me to change the color of a selected item in JComboBox.

    JComboBox cmb = new JComboBox();
    cmb.setEditable(true);
    cmb.setEditor(new WComboBoxEditor(getContentPane().getBackground()));

    // To change the arrow button's background        
    cmb.setUI(new BasicComboBoxUI(){
        protected JButton createArrowButton()
        {
            BasicArrowButton arrowButton = new BasicArrowButton(BasicArrowButton.SOUTH, null, null, Color.GRAY, null);
            return arrowButton;
        }
    });
    cmb.setModel(new DefaultComboBoxModel(new String[] { "a", "b", "c" }));

import java.awt.Color;
import java.awt.Component;
import java.awt.event.ActionListener;
import javax.swing.ComboBoxEditor;
import javax.swing.JTextField;

public class WComboBoxEditor implements ComboBoxEditor
{
    JTextField tf;

    public WComboBoxEditor(Color background)
    {
        tf = new JTextField();
        tf.setBackground(background);
        tf.setBorder(null);
    }

    public Component getEditorComponent()
    {
        return tf;
    }

    public void setItem(Object anObject)
    {
        if (anObject != null)
        {
            tf.setText(anObject.toString());
        }
    }

    public Object getItem()
    {
        return tf.getText();
    }

    public void selectAll()
    {
        tf.selectAll();
    }

    public void addActionListener(ActionListener l)
    {
        tf.addActionListener(l);
    }

    public void removeActionListener(ActionListener l)
    {
        tf.removeActionListener(l);
    }

}

If you'd like to change the color of items in JCombobox except for a selected one, customize ListCellRenderer.