java中寻找字符串中重复的字符（转）

 1 import java.util.HashMap;
 2 import java.util.Map;
 3 import java.util.Set;
 4 
 5 public class findMulString {
 6 
 7     /**
 8      * @param args
 9      */
10     public static void main(String[] args) {
11         // TODO Auto-generated method stub
12         printDuplicateCharacters("adsfadsfadsfhhh");
13     }
14     
15     public static void printDuplicateCharacters(String word)
16     {
17         char[] charaters=word.toCharArray();
18         Map<Character,Integer> charMap=new HashMap<Character,Integer>();
19         for (Character ch: charaters) {
20             if(charMap.containsKey(ch)){
21                 charMap.put(ch, charMap.get(ch)+1);
22             }else{
23                 charMap.put(ch, 1);
24             }
25         }
26         Set<Map.Entry<Character,Integer>> entrySet=charMap.entrySet();
27         System.out.printf("List of duplicate characters in Strng ‘%s‘ %n",word);
28         for(Map.Entry<Character, Integer> entry:entrySet){
29             if(entry.getValue()>1){
30                 System.out.printf("%s:%d:%n",entry.getKey(),entry.getValue());
31             }
32         }
33     }
34 }
35