Image Viewer

package gTest;

import java.awt.*;
import java.awt.event.*;
import java.io.File;
import javax.swing.*;

public class PictureLoader extends JFrame implements ActionListener {

    private JFileChooser chooser = new JFileChooser();
    private PicPanel pic = new PicPanel();

    public static void main(String[] args) {
        new PictureLoader().setVisible(true);
    }

    @SuppressWarnings("LeakingThisInConstructor")
    private PictureLoader() {
        super("PictureLoader");
        setLayout(new BorderLayout());
        setLocation(20, 20);

        Container flow = new Container();
        flow.setLayout(new FlowLayout(FlowLayout.CENTER));

        JButton but = new JButton("Select picture");
        but.addActionListener(this);
        flow.add(but);

        add(flow, BorderLayout.NORTH);

        add(pic, BorderLayout.CENTER);

        setDefaultCloseOperation(EXIT_ON_CLOSE);

        setPicture("X:/java/pic/brb.jpg");

        pack();
    }

    private void setPicture(Image i) {
        MediaTracker mt = new MediaTracker(this);
        mt.addImage(i, 0);
        try {
            mt.waitForID(0);
        } catch (Exception ex) {
            ex.printStackTrace(System.out);
        }
        pic.setPicture(i);
        pack();
        repaint();
        setVisible(true);
    }

    private void setPicture(String fileName) {
        Image i = Toolkit.getDefaultToolkit().getImage(fileName);
        setPicture(i);
    }

    @Override
    public void actionPerformed(ActionEvent ae) {
        if (chooser.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) {
            setPicture(chooser.getSelectedFile().getAbsolutePath());
        }

    }

    private class PicPanel extends JPanel {

        private Image image;

        private void setPicture(Image i) {
            image = i;
            Dimension d = new Dimension(image.getWidth(null), image.getHeight(null));
            setPreferredSize(d);
            setSize(d);
        }

        @Override
        public void paintComponent(Graphics g) {
            g.drawImage(image, 0, 0, null);
        }
    }
}