Jtree, Double Click to open a file

Question

Here is what I have so far:
tree.addMouseListener(new MouseAdapter(){
            public void mouseClicked(MouseEvent evt){
                if (evt.getClickCount()==2){
                    TreePath tp = tree
                            .getClosestPathForLocation(evt.getX(), evt.getY());
                    File file = (File)tp.getLastPathComponent();
                    // open the file here
                    if(file.isFile() && file.exists()){
                        System.out.format("You double clicked %s", file.toString());
                        //---->What goes here?
        });I've searched the internet and found a few examples that don't work. Anyhow if a person clicks on an image, it should open the image, if they click on a txt document it should open the text document. Any clues on how to implement that would be fantastic.

Answer 1

Thanks that seems to work. I can open .txt documents without a problem. However images don't open and .html pages open and then immediately close. Any ideas?
import java.awt.BorderLayout;
import java.awt.Desktop;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.File;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;.
tree.addMouseListener(new MouseAdapter(){
            public void mouseClicked(MouseEvent evt){
                if (evt.getClickCount()==2){
                    TreePath tp = tree
                            .getClosestPathForLocation(evt.getX(), evt.getY());
                    File file = (File)tp.getLastPathComponent();
                    // open the file here
                    if(file.isFile() && file.exists()){
                        System.out.format("You double clicked %s", file.toString());
                        try {
                            Desktop.getDesktop().open(file);
                        } catch (IOException ex) {
                            System.out.println("File Error: Unable to open");
                            Logger.getLogger(FileTree.class.getName()).log(Level.SEVERE, null, ex);
        });