疯狂java讲义习题7.2

题目描述： 创建一个List集合，并随意添加10个元素，然后返回索引为5处的元素；再获取其中某2个元素的索引，再删除索引为3的元素

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import java.io.*; import java.util.*; public class cmd {     public static void main(String args[])     {         List books = new ArrayList();         for (int i = 0;i < 10;i++)         {                 books.add(new String(String.valueOf(i*i)));         }         System.out.println(books.get(5));         System.out.println(books.indexOf("81"));         System.out.println(books.indexOf("100"));         System.out.println(books.remove(3));         System.out.println(books);              }      } 运行结果如下： 25 9 -1 9 [0, 1, 4, 16, 25, 36, 49, 64, 81] <script>window._bd_share_config={"common":{"bdSnsKey":{},"bdText":"","bdMini":"2","bdMiniList":false,"bdPic":"","bdStyle":"0","bdSize":"16"},"share":{}};with(document)0[(getElementsByTagName('head')[0]||body).appendChild(createElement('script')).src='http://bdimg.share.baidu.com/static/api/js/share.js?v=89860593.js?cdnversion='+~(-new Date()/36e5)];</script> 阅读(128) | 评论(0) | 转发(0) | 0

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