PROGRAM 18 : ENTER A STRING AND REMOVE THE DUPLICATE CHARACTERS OF STRING.

Example :

PROGRAM :

import java.io.*;
class RemoveDupChar
{
      public static void main(String args[])throws IOException
     {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        System.out.print("Enter any word : ");
        String s = br.readLine();
        int l = s.length();
        char ch;
        String ans="";
        for(int i=0; i<l; i++)
       {
            ch = s.charAt(i);
            if(ch!=' ')
                ans = ans + ch;
            s = s.replace(ch,' '); //Replacing all occurrence of the current character by a space
               }
        System.out.println("Word after removing duplicate characters : " + ans);
     }
}