Question

Write a Java program that reads a word and prints its bigrams substrings. A character bigram is defined as a continuous sequence of two characters in a word. For example, if the user provides the input "rum", the program prints

ru
um

Hint:

1. set two pointers, one always moves from the beginning of the string and the other moves from i+2, in which i is the current position of the first pointer.

2. print an error message if the input word is less than 2 characters long.

I've been struggling with this program for a few days now. I'm new to coding and an answer would be greatly appreciated.

Answer 1

import java.util.*;

class Bigram

{

    public static void main(String[] args)

    {

        Scanner sc = new Scanner(System.in);

       

        System.out.print("Enter a string : ");

       

        // read a complete line

        String str = sc.nextLine();

        System.out.println(str);

       

        // if the length of string is less than 2

        if( str.length() < 2 )

            System.out.print("Error! Invalid String.");

        else

        {

            int i = 0;

            int j = 1;

           

            // traverse the string

            while( i < str.length() - 2 )

            {

                System.out.println(String.valueOf(str.charAt(i)) + String.valueOf(str.charAt(j)));

               

                i++;

                j++;

            }

        }

    }

}

Sample Output

Enter a stringc chandleF : chandler an dl