Java遍历Set集合
- 对 set 的遍历
- 1.迭代遍历:
- Set<String> set = new HashSet<String>();
- Iterator<String> it = set.iterator();
- while (it.hasNext()) {
- String str = it.next();
- System.out.println(str);
- }
- 2.for循环遍历:
- for (String str : set) {
- System.out.println(str);
- }
- 优点还体现在泛型 假如 set中存放的是Object
- Set<Object> set = new HashSet<Object>();
- for循环遍历:
- for (Object obj: set) {
- if(obj instanceof Integer){
- int aa= (Integer)obj;
- }else if(obj instanceof String){
- String aa = (String)obj
- }
- ........
- }
posted on 2016-01-14 10:52 1130136248 阅读(104) 评论(0) 编辑 收藏 举报