Java-Buddy

It's a example to use Swing JFileChooser.

package javamyframe;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;
/**
 * @web http://java-buddy.blogspot.com/
 */
public class JavaMyFrame extends JFrame 
 implements ActionListener{
 JTextArea textArea;
 JButton buttonOpenFile;
 
 public static void main(String[] args) {
 
 SwingUtilities.invokeLater(new Runnable() {
 public void run() {
 createAndShowGUI();
 }
 });
 }
 private static void createAndShowGUI() {
 JavaMyFrame myFrame = new JavaMyFrame();
 myFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
 myFrame.prepareUI();
 myFrame.pack();
 myFrame.setVisible(true);
 }
 
 private void prepareUI(){
 textArea = new JTextArea();
 textArea.setEditable(false);
 JScrollPane panel = new JScrollPane(textArea);
 panel.setPreferredSize(new Dimension(300, 100));
 
 buttonOpenFile = new JButton("Open File");
 buttonOpenFile.addActionListener(this);
 
 getContentPane().add(panel, BorderLayout.CENTER);
 getContentPane().add(buttonOpenFile, BorderLayout.PAGE_END);
 }
 @Override
 public void actionPerformed(ActionEvent e) {
 
 if(e.getSource() == buttonOpenFile){
 final JFileChooser jFileChooser = new JFileChooser();
 int returnVal = jFileChooser.showOpenDialog(JavaMyFrame.this);
 if(returnVal == JFileChooser.APPROVE_OPTION){
 File file = jFileChooser.getSelectedFile();
 textArea.setText("Selected file: " + file.getName());
 }else if(returnVal == JFileChooser.CANCEL_OPTION){
 textArea.setText("Cancelled");
 }else if(returnVal == JFileChooser.ERROR_OPTION){
 textArea.setText("Error!");
 }else{
 textArea.setText("unknown...");
 }
 }
 }
}

Related: JavaFX 2.0: FileChooser - Open File Dialog

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