If the Java Program or Servlet hangs after creating the barcode, use the System.exit(0) command to exit the method creating the barcode. If this does not resolve the issue, similar problems have been associated with a corrupt JVM, so try another machine with a different version of the JVM. Usually, the System.exit(0) command is placed after the encoder command.

For example:

barCodeEncoder bce = new barCodeEncoder(bc, "JPEG", "newfile.jpg");
System.exit(0);