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import java.util.*;

public class DuplicateCharsInString

{

public void findDuplicateChars(String str)

{

Map<Character,Integer> dupMap = new HashMap<Character,Integer>();

char[] chars = str.toCharArray();

for(Character ch: chars)

{

if(dupMap.containsKey(ch))

{

dupMap.put(ch,dupMap.get(ch)+1);

}

else

{

dupMap.put(ch,1);

}

}

Set<Character> keys=dupMap.keySet();

for(Character ch: keys)

{

if(dupMap.get(ch) > 1)

{

System.out.println(ch+"---->" + dupMap.get(ch));

}

}

}

public static void main(String[] args)

{

DuplicateCharsInString dcs= new DuplicateCharsInString();

dcs.findDuplicateChars("HelloJavaProgram");

}

}