Image Preview FileChooser

FrameView.java

import java.awt.EventQueue;
import javax.swing.ImageIcon;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.EmptyBorder;
import javax.swing.JLabel;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.border.EtchedBorder;

@SuppressWarnings("serial")
public class FrameView extends JFrame 
{

	private JPanel contentPane;
	private JLabel lblImage;
	private JButton btnTampil;
	private JFileChooser fc = new JFileChooser();
	/**
	 * Create the frame.
	 */
	public FrameView() 
	{
		setResizable(false);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setBounds(100, 100, 677, 553);
		contentPane = new JPanel();
		contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
		setContentPane(contentPane);
		contentPane.setLayout(null);
		setLocationRelativeTo(null);
		
		lblImage = new JLabel("");
		lblImage.setBorder(new EtchedBorder(EtchedBorder.LOWERED, null, null));
		lblImage.setBounds(12, 12, 651, 431);
		contentPane.add(lblImage);
		
		btnTampil = new JButton("Buka Gambar");
		btnTampil.setIcon(new ImageIcon("/home/resa/Aplikasi Java/SwingComponents/src/Gambar/Simpan.png"));
		fc.setAccessory(new PreviewChooser(fc));
		btnTampil.addActionListener(new ActionListener() 
		{
			public void actionPerformed(ActionEvent act)
			{
				int buka = fc.showOpenDialog(lblImage);
				if(buka == JFileChooser.APPROVE_OPTION)
				{
					String src = fc.getSelectedFile().getPath();
					lblImage.setIcon(new ImageIcon(src));
				}
			}
		});
		btnTampil.setBounds(277, 455, 169, 40);
		contentPane.add(btnTampil);
	}
	
	/**
	 * Launch the application.
	 */
	public static void main(String[] args)
	{
		EventQueue.invokeLater(new Runnable() 
		{
			public void run() 
			{
				try 
				{
					UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
					FrameView frame = new FrameView();
					frame.setVisible(true);
				}
				catch (UnsupportedLookAndFeelException e) {
				} 
				catch (ClassNotFoundException e){
				} 
				catch (InstantiationException e) {
				} 
				catch (IllegalAccessException e) {
				}
			}
		});
	}
}

PreviewChooser.java

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Image;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.io.File;
import javax.swing.ImageIcon;
import javax.swing.JComponent;
import javax.swing.JFileChooser;

@SuppressWarnings("serial")
public class PreviewChooser extends JComponent implements PropertyChangeListener
{
	Double lebarImg = 200.0;
	Double tinggiImg = 200.0;
	File file = null;
	ImageIcon imageIcon = null;
	
	public PreviewChooser(JFileChooser fileChooser)
	{
		setPreferredSize(new Dimension(lebarImg.intValue(),tinggiImg.intValue()));
		fileChooser.addPropertyChangeListener(this);
	}
	
	public double getScale(ImageIcon img)
	{
		double skala;
		if((lebarImg>=img.getIconWidth()) && (tinggiImg >= img.getIconHeight()))
		{
			skala = 1;
		}
		else
		{
			double lebarSkala = lebarImg / img.getIconWidth();
			double tinggiSkala = tinggiImg / img.getIconHeight();
				
				if(lebarSkala > tinggiSkala)
				{
					skala = tinggiSkala;
				}
				else
				{
					skala = lebarSkala;
				}
		}
		return skala;
	}
	
	public void propertyChange(PropertyChangeEvent pce)
	{
		String properti = pce.getPropertyName();
		if(JFileChooser.DIRECTORY_CHANGED_PROPERTY.equals(properti))
		{
			file = null;
		}
		else if(JFileChooser.SELECTED_FILE_CHANGED_PROPERTY.equals(properti))
		{
			file = (File) pce.getNewValue();
		}
			if(file == null)
			{
				imageIcon = null;
			}
			else
			{
				ImageIcon imgIcon = new ImageIcon(file.getPath());
				double skala = getScale(imgIcon);
				imageIcon = new ImageIcon(imgIcon.getImage().getScaledInstance((int)((double)imgIcon.getIconWidth() * skala),(int)((double)imgIcon.getIconHeight() * skala),Image.SCALE_DEFAULT));
			}
		repaint();
	}
	
	protected void paintComponent(Graphics graph)
	{
		if(imageIcon != null)
		{
			int x = getWidth() / 2 - imageIcon.getIconWidth() / 2;
			int y = getHeight() / 2 - imageIcon.getIconHeight() / 2;
			imageIcon.paintIcon(this, graph, x, y);
		}
	}
}