Java Swing: Custom-Size ComboBox?

Dear experts:

Hi again!

I have a simple code which include a combobox. The problem is that the combobox is displayed streched all the way from the left end of the window to the right end of the window. I would like the combobox displayed in a certain width (example: 50) and height (example: 10) at a location 100 px from the left end of the window.

I will truly appreciate if you experts may kindly teach me how to do that.

Thanks a lot!

duta

________________ Here is my latest code _________________

import javax.swing.JOptionPane;
import java.text.DecimalFormat;
import java.util.regex.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

public class PhoneBill3 extends JApplet
{
 // private JList planList;
  private JComboBox planList = new JComboBox(new Object[] { "Unlimited Plan", "300 Anytime Minutes" });
  private JPanel Pname;
  private JPanel Pusage;
  private JPanel Ptotal;
  private JPanel Pbutton;
 
 
  /////////////////
 
  private JRadioButton unlimited, limited;
  private ButtonGroup radioGroup;
  ///////////////
 
 
  private JTextField Fname;
  private JTextField Fusage;
  private JTextField Ftotal;
  private Container c = getContentPane ( );
 
 // private String plans [] = {"Unlimited Plan", "Limited Plan"};
  JComboBox plans = new JComboBox(new Object[] { "Unlimited Plan", "300 Anytime Minutes" });
 
  public void init ( )
  {
    // Methods to build the panels
    buildPlan ();
    buildName ();
    buildUsage ();
    buildTotal ();
    buildButton ();
   
    // Create a layout manager
    setLayout ( new GridLayout (5, 1 ) );
   
    // Add the panels to the content pane
    add ( Pname);
    add ( planList );
    add ( Pusage);
    add ( Ptotal );
    add ( Pbutton );
  }
 /////////// ?????????????????????????????????????????????????????????  
  private void buildPlan ()
  {
   
   
   
 
   // select the first button by default
   plans.setSelectedIndex (0);
 }
 /////  ?????????????????????????????????????????????????????????????????
  private void buildName ()
  {
    Pname = new JPanel ( );
    JLabel message1 = new JLabel ("Your Name : " );
    Fname =  new JTextField ( 20 );
   
    Pname.setLayout ( new FlowLayout ( FlowLayout.RIGHT ) );
    Pname.add (message1);
    Pname.add ( Fname );
  }
 
  private void buildUsage ()
  {
    Pusage = new JPanel ( );
    JLabel message2 = new JLabel ("Your Anytime Usage : " );
    Fusage =  new JTextField ( 20 );
   
    Pusage.setLayout ( new FlowLayout ( FlowLayout.RIGHT ) );
    Pusage.add (message2);
    Pusage.add ( Fusage );
  }
 
  private void buildTotal ()
  {
    Ptotal = new JPanel ( );
    JLabel message3 = new JLabel ("Your Total Charge: " );
    Ftotal =  new JTextField ( 20 );
    Ftotal.setEditable ( false );
   
    Ptotal.setLayout ( new FlowLayout ( FlowLayout.RIGHT ) );
    Ptotal.add (message3);
    Ptotal.add ( Ftotal );
  }
 
 private void buildButton ()
  {
    Pbutton = new JPanel ( );
    JButton calcButton = new JButton ( "Calculate");
    calcButton.addActionListener ( new ButtonListener ( ) );
    Pbutton.add ( calcButton );
  }
 
 // Private inner class that andles the action event that is generated
 // when the user clicks "Calculate" button.
 
 
 private class ButtonListener implements ActionListener
 {
   public void actionPerformed ( ActionEvent e )
   {
     String name = " ";
     int mins_used = 0;
     int plan = 0;
     float total = 0.0f;
     
     name = Fname.getText ();
     try
     {
          mins_used = Integer.parseInt (Fusage.getText () );
 
          plan = planList.getSelectedIndex ();
   ///  ??????????????????????????????????????????????????????????????????????
     
           if (plan==1 )
           {      
               if (mins_used <= 300 )
                {
                   total = 39.99f;
                   Ftotal.setText (""+total);
                }
               else
                 {
                  total = 39.99f + ((mins_used - 300) * 0.45f);
                  Ftotal.setText (""+total);
               }
                                }
            else
           {
                    total = 69.99f;
                    Ftotal.setText (""+total);
            }
     ///// ????????????????????????????????????????????????????????????????????????????
     }
     catch(NumberFormatException nfe)
     {
          Ftotal.setText ("Please enter an integer by usage.");
     }
         
    }
 }
}