Middling The JFrame

[Awais Bajwa]

hi all,
How can JFrame is made to appear in the center .Which is by default appear in the center.
Awais Bajwa

[Nathan Pruett]

Here is some code with comments that will help you understand what is going on...

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class ScreenTest extends JFrame
{
    // Constructor
    public ScreenTest( String title )
    {
        super( title );
    }
    public static void main( String args[] )
    {
        // Create the frame and set it's size.
        ScreenTest st = new ScreenTest( "Centered" );
        st.setSize( 600, 300 );
        // Center the frame...
        //     First, get the screen size.
        Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
        //     Second, get the size of the frame.
        Dimension s = st.getSize();
        //     Third, subtract half the frame from half the screen
        //            to get the x and y coordinates of the upper
        //            left corner of the screen.
        int x = ( d.width / 2 ) - ( s.width / 2 );
        int y = ( d.height / 2) - ( s.height / 2 );
        //     Finally, apply these calculations to the frame.
        st.setBounds( x, y, s.width, s.height );
        // Add a WindowListener, so we can close the frame
        st.addWindowListener( new WindowAdapter() {
            public void windowClosing( WindowEvent e )
            {
                System.exit( 0 );
            }
        } );
        // Display the frame.
        st.setVisible( true );
    }
}

HTH,
-Nate

[Awais Bajwa]

hi Nathan,
Thanks a lot for ur code .I have very few time to explore this and u have really done well .Again thanks.
Awais Bajwa
(scjp).Pakistan