zoukankan      html  css  js  c++  java
  • java 集合操作小结

    Map<String,String> m1=new HashMap<String,String>();
    m1.put("zara", "name1");
    m1.put("mahnaz","31");
    m1.put("Ayna", "name2");
    m1.put("zara","kkk");
    System.out.println(m1.get("zara"));
    System.out.println(m1.hashCode());
    //1.
    for(Map.Entry<String, String> entry : m1.entrySet())
    {
    System.out.println(entry.getKey()+":"+entry.getValue());

    }
    //2.
    Set<String> keyset=m1.keySet();
    Iterator<String> iterator=keyset.iterator();
    while (iterator.hasNext()) {
    String mkey=iterator.next();
    String mvlaue=m1.get(mkey);
    System.out.println(mkey+":"+mvlaue);

    }
    //3.
    Collection<String> collection=m1.values();
    Iterator<String> iterator2=collection.iterator();
    while (iterator2.hasNext()) {
    System.out.println(iterator.next());
    }

    --------------------------------------------

    Java中key可以重复的Map集合:IdentityHashMap

    https://blog.csdn.net/u013159040/article/details/49000225

    List和Map是Java中最常用到的集合类

    https://blog.csdn.net/u012951323/article/details/52854175

    Java Map 集合类简介

    https://blog.csdn.net/casularm/article/details/164877

     

  • 相关阅读:
    vim编辑器和bash算术运算入门
    vim编辑器
    egrep及文本处理工具
    grep与基本正则表达式
    bash脚本编程基础及配置文件
    博客开通了
    测试用例考虑因素
    地图测试点的总结
    app测试的case点(2)
    App 99.9%稳定
  • 原文地址:https://www.cnblogs.com/chengjun/p/9205305.html
Copyright © 2011-2022 走看看