public static void checkDirectoryArgument(File fileName, String variableName) {
    """
	Checks a <code>File</code> argument to make sure that it is a directory. If not
	<code>IllegalArgumentException</code> is thrown.
	
	@param fileName
	The <code>File</code> to be checked.
	@param variableName
	The name of the variable being checked; for use in exception messages.
    """
    checkNullArgument(fileName, variableName);
    if (!fileName.isDirectory()) {
      throw new IllegalArgumentException(ExceptionMessageMap.getMessage("000007")
          + "  { variableName=[" + variableName + "] }");
    }
  }
public static void checkDirectoryArgument(File fileName, String variableName) {
    checkNullArgument(fileName, variableName);
    if (!fileName.isDirectory()) {
      throw new IllegalArgumentException(ExceptionMessageMap.getMessage("000007")
          + "  { variableName=[" + variableName + "] }");
    }
  }
public static void checkDirectoryArgument ( File fileName , String variableName ) { checkNullArgument ( fileName , variableName ) ; if ( ! fileName . isDirectory ( ) ) { throw new IllegalArgumentException ( ExceptionMessageMap . getMessage ( "000007" ) + "  { variableName=[" + variableName + "] }" ) ; } }
Checks a <code>File</code> argument to make sure that it is a directory. If not
<code>IllegalArgumentException</code> is thrown.

@param fileName
The <code>File</code> to be checked.
@param variableName
The name of the variable being checked; for use in exception messages.
Checks a <code > File< / code > argument to make sure that it is a directory . If not <code > IllegalArgumentException< / code > is thrown .