Thursday , 4 June 2020
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Program to Remove Duplicate Characters from a Word


Write a program to input a word from the user and remove the duplicate characters present in it.


INPUT – abcabcabc
OUTPUT – abc

INPUT – javaforschool
OUTPUT – javforschl

INPUT – Mississippi

Programming Code:

 * The class RemoveDupChar inputs a word and removes duplicate characters
 * @author :
 * @Program Type : BlueJ Program - Java

import java.util.*;
class RemoveDupChar
    public static void main(String args[])
        Scanner sc = new Scanner(;
        System.out.print("Enter any word : ");
        String s =;
        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);


Example 1:
Enter any word : Mississippi
Word after removing duplicate characters : Misp

Example 2:
Enter any word : Attitude
Word after removing duplicate characters : Atiude

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