Windows 7 & Java: Get Disk-identifier

Question

I have a hdd array with 4 encrypted hard-drives (truecrypt). I recently switched back from 5 years of linux to windows 7 and I find myself confronted with a problem I can't find a solution for. Under linux there was a command called "fdisk" which gives you all running (not mounted!) harddrives plus a unique disk-identifier which doesn't change (something like: Disk Identifier: 00x33f1a3c1). I need that same functionality under Windows, preferably writing the code in java.

cheers

edit:// For clarification, I need the Disk-ID without mounting the Disk!

Answer 1

A solution using VBS.

import java.io.File;
import java.io.FileWriter;
import java.io.BufferedReader;
import java.io.InputStreamReader;

public class DiskUtils {
  private DiskUtils() {  }

  public static String getSerialNumber(String drive) {
  String result = "";
    try {
      File file = File.createTempFile("realhowto",".vbs");
      file.deleteOnExit();
      FileWriter fw = new java.io.FileWriter(file);

      String vbs = "Set objFSO = CreateObject(\"Scripting.FileSystemObject\")\n"
                  +"Set colDrives = objFSO.Drives\n"
                  +"Set objDrive = colDrives.item(\"" + drive + "\")\n"
                  +"Wscript.Echo objDrive.SerialNumber";  
      fw.write(vbs);
      fw.close();
      Process p = Runtime.getRuntime().exec("cscript //NoLogo " + file.getPath());
      BufferedReader input =
        new BufferedReader
          (new InputStreamReader(p.getInputStream()));
      String line;
      while ((line = input.readLine()) != null) {
         result += line;
      }
      input.close();
    }
    catch(Exception e){
        e.printStackTrace();
    }
    return result.trim();
  }

  public static void main(String[] args){
    String sn = DiskUtils.getSerialNumber("C");
    javax.swing.JOptionPane.showConfirmDialog((java.awt.Component)
         null, sn, "Serial Number of C:",
         javax.swing.JOptionPane.DEFAULT_OPTION);
  }
}