@Override
	public String toString() {
		return this.toJSONString(0);
	}
@Test
	public void setEntryTest() {
		final HashMap<String, String> of = MapUtil.of("test", "testValue");
		final Set<Map.Entry<String, String>> entries = of.entrySet();
		final Map.Entry<String, String> next = entries.iterator().next();

		final JSONObject jsonObject = JSONUtil.parseObj(next);
		assertEquals("{\"test\":\"testValue\"}", jsonObject.toString());
	}