public static void main(String[] args) {

List<Integer> list1 = Arrays.asList(1,2,3,4,5);

List<String> list2 = Arrays.asList("a","b","c","d");

a:

for (Integer a :list1){

System.out.println(a);

for(String b:list2){

System.out.println(b);

break;--跳出内部for循环

// break a;--跳出外部for循环

continue a;--调出外部循环，执行下次外部循环

}

}

}