Image Viewer - MainWindow

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;

import javax.swing.BoxLayout;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollBar;
import javax.swing.JScrollPane;
import javax.swing.SwingConstants;

public class MainWindow extends JFrame implements ActionListener {
    final JFileChooser fc = new JFileChooser();
    JScrollPane scroll;
    JLabel image;

    public static void main( String[] args ) {
        new MainWindow();
    }

    MainWindow() {
        setTitle( "Image Viewer" );

        fc.setFileFilter( new ImageFilter() );
        fc.setAcceptAllFileFilterUsed( false );

        image = new JLabel( "No Image Loaded" );
        image.setHorizontalAlignment( SwingConstants.CENTER );

        scroll = new JScrollPane( image );
        scroll.setAlignmentX( JScrollPane.CENTER_ALIGNMENT );

        JButton load = new JButton( "Load Image" );
        load.setAlignmentX( JButton.CENTER_ALIGNMENT );
        load.setActionCommand( "loadImage" );
        load.addActionListener( this );

        JPanel main = new JPanel();
        main.setLayout( new BoxLayout( main, BoxLayout.PAGE_AXIS ) );
        main.add( scroll );
        main.add( load );

        add( main, BorderLayout.CENTER );
        pack();

        setSize( 640, 480 );
        setLocationRelativeTo( null );
        setVisible( true );
    }

    public void actionPerformed( ActionEvent event ) {
        if( event.getActionCommand().equals( "loadImage" ) ) {
            int val = fc.showOpenDialog( this );

            if( val == JFileChooser.APPROVE_OPTION ) {
                image.setIcon( new ImageIcon( fc.getSelectedFile().getAbsolutePath() ) );
                image.setText( "" );

                JScrollBar vbar = scroll.getVerticalScrollBar();
                JScrollBar hbar = scroll.getHorizontalScrollBar();
                vbar.setValue( vbar.getMinimum() );
                hbar.setValue( hbar.getMinimum() );
            }
        }
    }
}