program505.java

import java.util.*;

public class program505
{
    public static void main(String[] args) 
    {
        Scanner sobj = new Scanner(System.in);

        System.out.println("Enter The  String : ");
        String str = sobj.nextLine();

       str = str.replaceAll(" ", "");

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

       char Arr[] = str.toCharArray();
       int Frequency = 0;

       for(char ch : Arr)
       {
            if(hobj.containsKey(ch)) // Character is already there in hashmap
            {
                Frequency = hobj.get(ch);
                hobj.put(ch,Frequency+1);
            }
            else // Character occured first time
            {
                hobj.put(ch,1);
            }

            
       }
        System.out.println("Unique Character are :");
        for(char ch : hobj.keySet())
        {
            System.out.println(ch);
        }
         
    }    
}