Java遍历Set会合

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ObjectSet<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             }              ........}