Program to remove repeating letters from a String (Java)

Welcome friends to Blogger Codemaster. This is our another post. So in this post, I would like to give you a Java program to remove the repeating letters from a word.

So let's get started with our today's topic - PROGRAM TO REMOVE REPEATING LETTERS.

 

QUESTION

Write a Java program to accept a word in lowercase and display the new word after removing all the repeated letters.

FULL CODE

 import java.util.*;

public class NoRepeat

{

    public static void main(String args[])

    {

        Scanner in=new Scanner(System.in);

        System.out.println("Enter a word: ");

        String word = in.next();

        

        // Converts the string to Lower Case.

        word = word.toLowerCase();

        

        // Variable for string new word.

        String w1="";

        

        for(int i=0;i<word.length();i++)

        {

            // Checks the first Index of the character.

            if(word.indexOf(word.charAt(i))==i)

            w1=w1+word.charAt(i);

        }

        

        // Prints the new word.

        System.out.println("The new word after removing all the repeated letters: "+w1);

    }

}

Here in this program, We have used indexOf() method to get the first occurance of the letter. If it matches with the index of current iteration, that means it is the first occurance, and we store it in w1 variable.

 

VARIABLE DESCRIPTION

Variable	Data Type	Description
word	String	Word which is taken as input.
w1	String	New Word Generated.
i	int	Loop Variable.

 

OUTPUT

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