How can I make the combo box turn to the value of black.

Question

When the show button is pressed (and not before), a filled black square should be
displayed in the display area. The combo box (or drop down list) that enables the user to choose the colour of
the displayed shape and the altering should take effect immediately.When the show button is pressed,
the image should immediately revert to the black square, the combo box should show the value that
correspond to the black.
Now ,the problem is: after I pressed show button, the image is reverted to the black square,but I don't know
how can I make the combo box turn to the value of black.
Any help or hint?Thanks a lot!
coding 1.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class test extends JFrame {
     private JPanel buttonPanel;
     private DrawPanel myPanel;
     private JButton showButton;
     private JComboBox colorComboBox;
private boolean isShow;
     private int shape;
     private boolean isFill=true;
private String colorNames[] = {"black", "blue", "cyan", "darkGray", "gray",
"green", "lightgray", "magenta", "orange",
"pink", "red", "white", "yellow"}; // color names list in ComboBox
private Color colors[] = {Color.black, Color.blue, Color.cyan, Color.darkGray,
                          Color.gray, Color.green, Color.lightGray, Color.magenta,
                          Color.orange, Color.pink, Color.red, Color.white, Color.yellow};
     public test() {
     super("Draw Shapes");
     // creat custom drawing panel
myPanel = new DrawPanel(); // instantiate a DrawPanel object
myPanel.setBackground(Color.white);
     // set up showButton
// register an event handler for showButton's ActionEvent
showButton = new JButton ("show");
     showButton.addActionListener(
          // anonymous inner class to handle showButton events
     new ActionListener() {
               // draw a black filled square shape after clicking showButton
     public void actionPerformed (ActionEvent event) {
                         // call DrawPanel method setShowStatus and pass an parameter
          // to decide if show the shape
     myPanel.setShowStatus(true);
               isShow = myPanel.getShowStatus();
                                        shape = DrawPanel.SQUARE;
                    // call DrawPanel method setShape to indicate shape to draw
                                        myPanel.setShape(shape);
                    // call DrawPanel method setFill to indicate to draw a filled shape
                                        myPanel.setFill(true);
                    // call DrawPanel method draw
                                        myPanel.draw();
                         myPanel.setFill(true);
                         myPanel.setForeground(Color.black);
               }// end anonymous inner class
     );// end call to addActionListener
// set up colorComboBox
// register event handlers for colorComboBox's ItemEvent
colorComboBox = new JComboBox(colorNames);
colorComboBox.setMaximumRowCount(5);
colorComboBox.addItemListener(
     // anonymous inner class to handle colorComboBox events
     new ItemListener() {
     // select shape's color
     public void itemStateChanged(ItemEvent event) {
     if(event.getStateChange() == ItemEvent.SELECTED)
     // call DrawPanel method setForeground
     // and pass an element value of colors array
     myPanel.setForeground(colors[colorComboBox.getSelectedIndex()]);
myPanel.draw();
}// end anonymous inner class
); // end call to addItemListener
// set up panel containing buttons
     buttonPanel = new JPanel();
buttonPanel.setLayout(new GridLayout(4, 1, 0, 50));
     buttonPanel.add(showButton);
buttonPanel.add(colorComboBox);
JPanel radioButtonPanel = new JPanel();
radioButtonPanel.setLayout(new GridLayout(2, 1, 0, 20));
Container container = getContentPane();
container.setLayout(new BorderLayout(10,10));
container.add(myPanel, BorderLayout.CENTER);
     container.add(buttonPanel, BorderLayout.EAST);
setSize(500, 400);
     setVisible(true);
     public static void main(String args[]) {
     test application = new test();
     application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
coding 2
import java.awt.*;
import javax.swing.*;
public class DrawPanel extends JPanel {
     public final static int CIRCLE = 1, SQUARE = 2;
     private int shape;
     private boolean fill;
     private boolean showStatus;
private int shapeSize = 100;
private Color foreground;
     // draw a specified shape
public void paintComponent (Graphics g){
          super.paintComponent(g);
          // find center
int x=(getSize().width-shapeSize)/2;
          int y=(getSize().height-shapeSize)/2;
          if (shape == CIRCLE) {
     if (fill == true){
     g.setColor(foreground);
          g.fillOval(x, y, shapeSize, shapeSize);
else{
               g.setColor(foreground);
g.drawOval(x, y, shapeSize, shapeSize);
          else if (shape == SQUARE){
     if (fill == true){
     g.setColor(foreground);
                    g.fillRect(x, y, shapeSize, shapeSize);
else{
                    g.setColor(foreground);
g.drawRect(x, y, shapeSize, shapeSize);
// set showStatus value
public void setShowStatus (boolean s) {
          showStatus = s;
     // return showstatus value
public boolean getShowStatus () {
          return showStatus;
     // set fill value
public void setFill(boolean isFill) {
          fill = isFill;
     // set shape value
public void setShape(int shapeToDraw) {
          shape = shapeToDraw;
// set shapeSize value
public void setShapeSize(int newShapeSize) {
          shapeSize = newShapeSize;
// set foreground value
public void setForeground(Color newColor) {
          foreground = newColor;
     // repaint DrawPanel
public void draw (){
          if(showStatus == true)
          repaint();

Answer 1

Hello,
does setSelectedIndex(int anIndex)
do what you need?
See Java Doc for JComboBox.