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

Question:

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

Example:

INPUT – abcabcabc
OUTPUT – abc

INPUT – javaforschool
OUTPUT – javforschl

INPUT – Mississippi
OUTPUT – Misp


Programming Code:

/**
 * The class RemoveDupChar inputs a word and removes duplicate characters
 * @author : www.guideforschool.com
 * @Program Type : BlueJ Program - Java
 */

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

Output:

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

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

Check Also

Infix Postfix Prefix Conversion – Correct Method (ISC Computer Science)

In this video we discuss about the correct way of converting an Infix Expression to Postfix and Prefix.

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