java遍历Map的两种方法

	public static void main(String[] args) {
		Map<String, String> map = new HashMap<String, String>();
		map.put("1", "11");
		map.put("2", "22");
		map.put("3", "33");

		/**
		 * 通过Map.entrySet使用iterator遍历key和value
		 */
		Iterator<Map.Entry<String, String>> it = map.entrySet().iterator();
		while (it.hasNext()) {
			Map.Entry<String, String> entry = it.next();
			System.out.println("key= " + entry.getKey() + " and value= "
					+ entry.getValue());
		}
		/**
		 * 通过Map.entrySet遍历key和value
		 */
		for (Map.Entry<String, String> entry : map.entrySet()) {
			String key = entry.getKey();
			String value = entry.getValue();
			System.out.println("key= " + key + " and value= "
					+ value);
		}
	}