BCA and B.Sc Programs - Programming in Java Lab - Bharathiar University - Practical Program 1- Write a Java Applications to extract a portion of a character string and print the extracted string.

 

Bharathiar University

Programming Java Lab

Java Program 1

Write a Java Applications to extract a portion of a character string and print the extracted string.

Source Code 

import java.util.Scanner;

public class PrintString

{ 

    public static void main(String args[]) 

    {

        Scanner in = new Scanner(System.in);

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

        String s = in.nextLine();

        int len = s.length();

        System.out.print("Enter index of starting character  : ");

        int n = in.nextInt();

       

        if(n < 0 || n >= len)

        {

            System.out.println("Invalid index");

            System.exit(1);

        }

       

        System.out.print("Enter number of characters to extract from String :\n ");

        int m = in.nextInt();

       

        int substrend = n + m;

        if( m <= 0 || substrend > len)

        {

            System.out.println("Invalid number of characters");

            System.exit(1);

        }      

        String extstr = s.substring(n, substrend);

        System.out.println("Extracted String = " + extstr);

    }

}

Output: