public static String getUserDirectory() {
    return FileUtils.ensureTrailingSlash(System.getProperty("user.home"));
  }
Returns the user's home directory. The path returned by this method always contains a trailing
path separator.

@return the full path to the user's home directory.
java/zylib/src/main/java/com/google/security/zynamics/zylib/system/SystemHelpers.java