assertThat(ArrayUtil.equalsIgnoreSequence(new Object[] { "1" }, new Object[] { "1" }), is(true));
        assertThat(ArrayUtil.equalsIgnoreSequence(new Object[] { "1", "2", "3" }, new Object[] { "2", "3", "1" }), is(true));
        assertThat(ArrayUtil.equalsIgnoreSequence(new Object[] { "1" }, new Object[] { "2" }), is(not(true)));
        assertThat(ArrayUtil.equalsIgnoreSequence(new Object[] { "1" }, new Object[] {}), is(not(true)));

     * @param array1
     *            配列1
     * @param array2
     *            配列2
     * @return 順番は無視して2つの配列が等しければ{@literal true}
     */
    public static <T> boolean equalsIgnoreSequence(final T[] array1, final T[] array2) {
        if (array1 == null && array2 == null) {
            return true;
        } else if (array1 == null || array2 == null) {
            return false;
        }