How I can get a JFrame to open in the middle of the screen?

Question

Okay, I have been looking for an answer on how I can make a JFrame open in the center of the screen like the JOptionpane's "null" argument does. Maybe, I am putting the wrong words in the search but I can't find any help on this.
Thanks
***Sample***
import java.awt.FlowLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
public class JFrameProb extends JFrame
     private JLabel someText;
     private JLabel someText2;
     private JLabel someText3;
     public JFrameProb()
          super("Why is this always going to the Corner?");
          setLayout( new FlowLayout() );
          someText = new JLabel("This Window Popped open in the top-left Corner...");
          add(someText);
          someText2 = new JLabel("Is there a way to open in the Center of the Screen?");
          add(someText2);
          someText3 = new JLabel("I know JOptionPane does.");
          add(someText3);
}

Answer 1

JosAH,
I tried using your code but it errored out:
C:\Program Files\Java\jdk1.5.0\PimpThatHo\PimpNameGetter.java:78: cannot find symbol
symbol : variable Centralizer
location: class PimpNameGetter.TextFieldHandler
Centralizer.centralize(comboBox);
^
1 error
Process completed.
So I made a java file for the Cebtralizer Class but it gave me this:
--------------------Configuration: <Default>--------------------
C:\Program Files\Java\jdk1.5.0\PimpThatHo\Centralizer.java:3: cannot find symbol
symbol : class Component
location: class Centralizer
public static void centralize(Component c) {
^
C:\Program Files\Java\jdk1.5.0\PimpThatHo\Centralizer.java:5: cannot find symbol
symbol : class Dimension
location: class Centralizer
Dimension screenSize= Toolkit.getDefaultToolkit().getScreenSize();
^
C:\Program Files\Java\jdk1.5.0\PimpThatHo\Centralizer.java:5: cannot find symbol
symbol : variable Toolkit
location: class Centralizer
Dimension screenSize= Toolkit.getDefaultToolkit().getScreenSize();
^
C:\Program Files\Java\jdk1.5.0\PimpThatHo\Centralizer.java:6: cannot find symbol
symbol : class Dimension
location: class Centralizer
Dimension compSize= c.getPreferredSize();
^
4 errors
Process completed.
I know I am missing packages but I don't know which ones.
Roman03_