How to open the notepad file in java?

Question

I want to open Notepad in my Java program. Suppose that I have one button if I click this button the notepad will appear. I already have a file name and a directory.

How can I implement this case?

Answer 1

Try

if (Desktop.isDesktopSupported()) {
    Desktop.getDesktop().edit(file);
} else {
    // I don't know, up to you to handle this
}

Make sure the file exists. Thanks to Andreas_D who pointed this out.

Answer 2

(assuming you want notepad to open "myfile.txt" :)

ProcessBuilder pb = new ProcessBuilder("Notepad.exe", "myfile.txt");
pb.start();