HashMap in Java

Write a program to print duplicate characters in string with count of them?

import java.util.Map;

import java.util.HashMap;

public class Miscellineous {

public void printDuplicatesCharsandCountOfString() {

System.out.println("Printing the duplicate characters of String");

Scanner sc = new Scanner(System.in);

System.out.println("Enter a string that contains duplicate Chars");

String str = sc.nextLine();

HashMap<Character, Integer> hs=new HashMap<Character,Integer >();

char[] ch=str.toCharArray();

for(char h:ch)

if(hs.containsKey(h))

{

hs.put(h, hs.get(h)+1);

}

else

{

hs.put(h, 1);

}

for(Map.Entry m:hs.entrySet()){  

if((int)m.getValue()>1)

{

System.out.println(m.getKey()+" "+m.getValue());  

}

}

}

public static void main(String[] args) {

Miscellineous msc = new Miscellineous();

msc.printDuplicatesCharsandCountOfString();

}

}

Output:

Printing the duplicate characters of String
Enter a string that contains duplicate Chars
hhmmhhmmhhjkkjjll
h 6
j 3
k 2
l 2

m 4

How to get the values from HashMap in java?

 for(String s:hm.values()){  

   System.out.println(s);  

How to get the keys from HashMap in java?

for(int s:hm.keySet()){  

   System.out.println(s);

To get all the entries from a map:

  for(Map.Entry m:hm.entrySet()){  
   System.out.println(m.getKey()+" "+m.getValue());  
  }