Question

我有hashmap列表。我想迭代数据。请帮我举个例子。我有一张表，我在Y轴上有几个月，在X轴上有（MS_Target，HSD_Target，ALPG_Target，Lube_Target）等字段。我的代码如下：

 List<Map<String, Integer>> ListofHash = new ArrayList<Map<String, Integer>>();

        {

        for (int i = 0; i < 10; i++) 
          {
          Map<String, Integer> mMap = new HashMap<String, Integer>();

          mMap.put(String.valueOf(i), Integer.valueOf( + i));

          ListofHash.add(mMap); 
           }
      for (Map<String, Integer> map : ListofHash)
            {
            for (String key : map.keySet())
             {
               System.out.println(map.get(key));
          }
      }

HashMap <String,Integer> april= new HashMap <String,Integer>();

    april.put("aprMS",new Integer(1));
    april.put("aprHSD",new Integer(2));
    april.put("aprAlpg",new Integer(3));
    april.put("aprLubes",new Integer(4));

HashMap <String, Integer> may= new HashMap <String, Integer>();

    may.put("mayMS",new Integer(1));
    may.put("mayHSD",new Integer(2));
    may.put("mayAlpg",new Integer(3));
    may.put("mayLubes",new Integer(4));

}

同样，我已经为所有月份创建了hashmap。另外，请告诉我应该采取什么样的关键和价值。请帮我一个例子。我给所有领域都提供了独特的名字。例如：apr_MS，apr_HSD等我的表格如下：

Month         MS_Target     HSD_Target     ALPG_Target        Lubes_Target
April
May 
June
July 
August
September
October
November
December
January
February 
March

Answer 1

您可以在hashmap上使用迭代器，请参阅此处：

Hashmap iteration

如何遍历hashmap数据列表

1 个答案: