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

1   
2     void jButton1_actionPerformed(ActionEvent e) {
3       // File (or directory) with old name
4        File file = new File("c:\\test1.txt");
5    
6        // File (or directory) with new name
7        File file2 = new File("c:\\test2.txt");
8    
9        // Rename file (or directory)
10       boolean success = file.renameTo(file2);
11       if (success == true) {
12      this.setTitle("File rename was a success!");
13       }
14   else {
15      this.setTitle("Failure"); 
16       }
17  
18    }
19