Re: Combobox Project: How to put 4 text items in the combobox

Knute Johnson <>
Wed, 10 Oct 2012 16:30:00 -0700
On 10/10/2012 2:35 PM, wrote:

My intention is to (1) maintain the 4 different colors already in the
project, but to also add the text (Apples, Cars, Shrimp, Moon)
described. Each item of the combobox will have its color plus text.

I want to also invoke one of 4 different methods when someone chooses
one of the colors. Each corresponding method will print the attached

Thank you,

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class test extends JPanel implements ActionListener {
     KColor[] kColors = {
      new KColor(200,200,255,"Blue moon","Always a blue moon"),
      new KColor(255,100,0,"Orange","Halloween color"),
      new KColor(100,20,0,"Toast","I like mine burnt") };

     public test() {
         setPreferredSize(new Dimension(320,240));

         JComboBox<KColor> box = new JComboBox<>(kColors);

     public void actionPerformed(ActionEvent ae) {
         JComboBox<KColor> box = (JComboBox<KColor>)ae.getSource();
         if (box.getSelectedItem() instanceof String) {
             JOptionPane.showMessageDialog(this,"Enter new KColor Data");
             // add new KColor to JComboBox
         } else {
             KColor kColor = (KColor)box.getSelectedItem();

     public static void main(String[] args) {
         EventQueue.invokeLater(new Runnable() {
             public void run() {
                 JFrame f = new JFrame();
                 f.add(new test(),BorderLayout.CENTER);

     class KColor extends Color {
         public String name;
         public String message;

         public KColor(int red,int green,int blue,String name,String
message) {
    = name;
             this.message = message;

         public String toString() {
             return name;

         public String showDetail() {
             return String.format("%s %d %d %d %s",name,getRed(),


Knute Johnson

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