How to test whether the entered value is numeric or it contains some characters.

[radhi16]

here is the code which i have written

import java.util.Scanner;

public class Assignment {

    public static void main(String[] args) {
        int row, column;
         
        int s=0;
        boolean found = false;
        String rollNumber;
        
        while (!found) {

            try {
                Scanner scan = new Scanner(System.in);
                System.out.print("Enter the size of the array s: ");
               String size = scan.next();
                
                System.out.println("size is :" +size);
              System.out.println();
                  
               found = true;
                
            } catch (NumberFormatException nfe) {
                System.out.print("Please enter the number again in correct format:");
                System.out.println();


            }

        }
        
       // int[][] arr = new int[size][3];
        

    }
}

[KevinWorkman]

What's your question? Where are you stuck? What have you tried?

See the APIs for String and Character for useful functions.

[radhi16]

got the answer.

[masijade]

So post it (along with clarification of the question) so if someone else with the same problem can also get help.