set遍历

来源：互联网发布：对网络教育的看法英语编辑：程序博客网时间：2024/06/02 21:32
对 <span style="background-color: rgb(153, 255, 153);">set</span> 的<span style="background-color: rgb(160, 255, 255);">遍历</span>1.迭代<span style="background-color: rgb(160, 255, 255);">遍历</span>：<span style="background-color: rgb(153, 255, 153);">Set</span><String> <span style="background-color: rgb(153, 255, 153);">set</span> = new HashSet<String>();Iterator<String> it = <span style="background-color: rgb(153, 255, 153);">set</span>.iterator();while (it.hasNext()) {  String str = it.next();  System.out.println(str);}2.for循环<span style="background-color: rgb(160, 255, 255);">遍历</span>：for (String str : <span style="background-color: rgb(153, 255, 153);">set</span>) {      System.out.println(str);}优点还体现在泛型 假如 <span style="background-color: rgb(153, 255, 153);">set</span>中存放的是Object<span style="background-color: rgb(153, 255, 153);">Set</span><Object> <span style="background-color: rgb(153, 255, 153);">set</span> = new HashSet<Object>();for循环<span style="background-color: rgb(160, 255, 255);">遍历</span>：for (Object obj: <span style="background-color: rgb(153, 255, 153);">set</span>) {      if(obj instanceof Integer){                int aa= (Integer)obj;             }else if(obj instanceof String){               String aa = (String)obj             }              ........}
0 0