Exception in thread "main" java.util.NoSuchElementException at java.util.ArrayList$Itr.next(Unknown

源碼：

public static void printEmployeeInfo(List<Map<String, Object>> list) {
		for(Iterator<Map<String, Object>> it = list.iterator(); it.hasNext();) {
			System.out.print(it.next().get("ID")+"\t");
			System.out.print(it.next().get("姓名")+"\t");
			System.out.print(it.next().get("薪水")+"\t");
			System.out.print(it.next().get("單位")+"\t");
			System.out.println(it.next().get("入職時間"));
		}
	}

報錯的原因是：每調用一次it.next()，則記錄的“指針”便會指向下一條。所以需要定義一個局部變量來接收一下。
解決辦法：

public static void printEmployeeInfo(List<Map<String, Object>> list) {
		for(Iterator<Map<String, Object>> it = list.iterator(); it.hasNext();) {
			Map<String, Object> map = it.next();
			System.out.print(map.get("ID")+"\t");
			System.out.print(map.get("姓名")+"\t");
			System.out.print(map.get("薪水")+"\t");
			System.out.print(map.get("單位")+"\t");
			System.out.println(map.get("入職時間"));
		}
	}