current directory in string command to run a file

Question

i have already asked a similar question but i have changed up my code a little bit. i am in the making of an application that opens other applications from a usb, like a hirens boot cd menu toolbox. my problem now is that every time i plug my usb into another computer with java file and tools the directory changes. for example if my script is...

String command = "E:/IPRESET.bat"

than when i connect the usb to another pc than it might change from E to J, or whatever.

i wanted to know if there is a way to replace E,J,K or whatever with a code to set the current java file directory so it changes for every computer. Thank you!

Answer 1

If I understand your question then yes. A file in the current folder could be accessed with something like,

String command = "IPRESET.bat";
File f = new File(command);
if (f.exists()) {
    try {
        System.out.println(f.getCanonicalPath());
    } catch (IOException e) {
        e.printStackTrace();
    }
}

Note: It's a really good idea to make sure the File.exists() before you try and use it.

Also, you could possibly use File.listRoots() to List the available filesystem roots and iterate them to check for your script like

File[] roots = File.listRoots();
for (File r : roots) {
  File f = new File(r, "IPRESET.bat");
  if (f.exists()) {
    // ...
  }
}