JComboBox Visibility on JFrame

Question

Hi All,
I am developing an Applet application. The application requires a new window to be displayed on button click, so I used JFrame in developing the new window which is popped up. In the new window I need a JComboBox. I added the JComboBox along with the other components to the frame. All the other components added are visible but the JComboBox is not visible. Then I added a border for the ComboBox then the border is visble but the box is not visible. When I click on the area represented by the Border I am able to view the list of the elements that are added to the Combobox. When I select one of the components from the list the selected component is not displayed on the box. I tried using setBackground(Color.white) but I am not able to see the ComboBox and only a white rectagular box is visible. I am not able to see atleast the arrow mark on the ComboBox which is used to display the list of items added to the ComboBox.
Any help is greatly appreciated,
Regards,
Ranjith.

Answer 1

First of all thanks for your reply
The code is
public class PacketConfigurationPanel extends JPanel implements ActionListener{
//Defining variables
JFrame frame;
JComboBox patternComboBox;
MyTextField typeField;
Font commonFont;
int positionX, positionY, frameWidth, frameHeight;
int dlWidth, dlHeight, prWidth, prHeight;
//Constructor
public PacketConfigurationPanel() {
//Initialization
frame = new JFrame("Packet Configuration Dialog");
frameWidth = 500;
frameHeight = 500;
frame.setSize(frameWidth, frameHeight);
Container contentPane = frame.getContentPane();
contentPane.setLayout(null);
frame.setVisible(true);
commonFont = new Font("Dialog", Font.PLAIN, 12);
positionX = 15;
positionY = 15;
positionY += 17;
String[] element = {"Blah Blah", "Blah Blah"};
patternComboBox = new JComboBox(element);
patternComboBox.setFont(commonFont);
patternComboBox.setVisible(true);
patternComboBox.setEditable(true);
//patternComboBox.setForeground(Color.black);
//patternComboBox.setSelectedIndex(0);
patternComboBox.setBounds(positionX, positionY, 100, 20);
//patternComboBox.setOpaque(true);
contentPane.add(patternComboBox);
//contentPane.setBackground(Color.blue);
I removed the code which is used to add other components to the frame and included the code which is used to add the ComboBox. This class is called by another class which is used to develop the applet.
Waiting for your reply,
Ranjith.