问字符串数量( java )

EN

HashMap<Text,Integer> m = new HashMap<Text,Integer>();
//Populate the HashMap
while(values.hasNext()) 
{
  Text element = values.next();
  if(m.get(element) == null)
  {
   m.put(element , 1);
  }       
  else m.put(element , m.get(element) + 1);   
}

//Display the frequencies
for (Map.Entry<Text, Integer> entry : m.entrySet())
{
    System.out.println(entry.getValue() + "/" + entry.getKey().period  );
}

    List<String> values = new ArrayList<>();

    values.add("morning");
    values.add("evening");
    values.add("morning");

    // Function.identity() means p->p, since example collection is very simple
    // If your objects are more than strings, you'll need to map them: p -> p.getName(), for example
    Map<String, Long> collect =
            values.stream().collect(groupingBy(Function.identity(), counting()));

    System.out.println(collect);

HashMap<String, Integer> maps = new HashMap<>();
      while(itr.hasNext()) {
          Object element = itr.next();
          Integer i = maps.get(element.toString());
          if(i == null) {
              maps.put(element.toString(), 1);
          }
          else {
              maps.put(element.toString(), ++i);
          }
       }

      //See result
      for(Entry<String, Integer> e : maps.entrySet()) {
          System.out.println(e.toString());  
      }