Browse for files with Java Swing

I needed some code to be able to browse for files on the file system with Java so I put together this code that you could use to browse for files on the file system.

You can modify it to only browse files, directories or both:

chooser.setFileSelectionMode(JFileChooser.FILES_ONLY);

/* FILES_ONLY DIRECTORIES_ONLY FILES_AND_DIRECTORIES */

You can specify which file types (file extensions) you wish to allow the browser to find. In my case I have allowed xml and xsl:

FileFilter filter = new FileNameExtensionFilter("File Extensions","xsl","xml");

The ‘FileTest’ class.
It outputs the chosen file names and their absolute paths on the console.

import java.awt.Dimension; 
import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.awt.event.WindowAdapter; 
import java.awt.event.WindowEvent; 
import java.io.File; 
import javax.swing.JButton; 
import javax.swing.JFileChooser; 
import javax.swing.JFrame; 
import javax.swing.JPanel; 
import javax.swing.filechooser.FileFilter; 
import javax.swing.filechooser.FileNameExtensionFilter; 
public class FileTest extends JPanel implements ActionListener { 
	JButton go; 
	JFileChooser chooser; 
	String choosertitle; 
	String fileContent = ""; 
	File[] files;    
	static final long serialVersionUID = 0; 
	public FileTest() { 
		go = new JButton("Browse"); 
		go.addActionListener(this); 
		add(go); 
	} 
	public void actionPerformed(ActionEvent e) {      
		chooser = new JFileChooser();  
		chooser.setCurrentDirectory(new java.io.File(".")); 
		chooser.setDialogTitle(choosertitle); 
		chooser.setFileSelectionMode(JFileChooser.FILES_ONLY); 
		chooser.setMultiSelectionEnabled(true); 
		FileFilter filter = new FileNameExtensionFilter("File Extensions","xsl","xml"); 
		chooser.setFileFilter(filter); 
		/* Disable the "All files" option */ 
		chooser.setAcceptAllFileFilterUsed(false); 
		if (chooser.showOpenDialog(this) == JFileChooser.APPROVE_OPTION) {     	 
			files = chooser.getSelectedFiles(); 
			/* Loop through all files */ 
			for (int i=0;i<files.length;i++) {   
				System.out.println(files[i].getAbsoluteFile()); 
			} 
		} else { 
			System.out.println("No Selection "); 
		}     
	} 
	public Dimension getPreferredSize(){ 
		return new Dimension(200, 100); 
		} 
	/* remove leading whitespace */ 
	public static String ltrim(String source) {	 
		return source.replaceAll("^\\s+", ""); 
	} 
	/* remove trailing whitespace */ 
	public static String rtrim(String source) { 
		return source.replaceAll("\\s+$", ""); 
	}

public static void main(String s[]) { JFrame frame = new JFrame("Browse for files"); FileTest panel = new FileTest(); frame.addWindowListener( new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } } ); frame.getContentPane().add(panel,"Center"); frame.setSize(panel.getPreferredSize()); frame.setVisible(true); } }