import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
1   
2   
3     void jButton1_actionPerformed(ActionEvent e) {
4       File file = new File("c:\\test1.txt");
5     
6         // Get the number of bytes in the file
7         long length = file.length();
8      this.setTitle("Size of file " +(length/1024)+ " KB");
9     }