Hi everyone...I am writing code in java to open .txt file in system using FileDialog() class. But I don't know how to generate the dialog box which windows generate when we try to open the file which is not present in that directory. please write the peace of code for that. Thankyou in advance...

http://java.sun.com/j2se/1.4.2/docs/api/java/io/File.html#exists() and http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/JOptionPane.html#showMessageDialog(java.awt.Component,%20java.lang.Object)

 in the simplest form, the code would look something like if(!new File(<file>).exist()) JOptionPane.showMessageDialog("file not found");