/**
     * Returns the default handler invoked when a thread abruptly terminates
     * due to an uncaught exception. If the returned value is <tt>null</tt>,
     * there is no default.
     * @since 1.5
     * @see #setDefaultUncaughtExceptionHandler
     */

    public static UncaughtExceptionHandler getDefaultUncaughtExceptionHandler(){

  {- -------------------------------------------
  (1) defaultUncaughtExceptionHandler フィールドの値をリターンするだけ.
      ---------------------------------------- -}

            return defaultUncaughtExceptionHandler;
        }