Question

Complete the program below in order to make run properly by competing validName methods and add trycatch block in the main method

public class ExceptionWithThrow {

public static String validName(String name) throws InputMismatchException{

// check here if the name is a valid name

// through InputMismatchException if invalid //throw

// return the name if it is valid

}

public static void main(String[] args) {

// Ask the user to enter a name and their validity through validName method

// Add try and catch block around appropriate statements

}

}

Answer 1

The answer has been given below:-

import java.io.*;
import java.util.*;

public class ExceptionWithThrow
{
    public static String validName(String name)throws InputMismatchException
    {
       if ((name != null) 
                && (!name.equals("")) 
                && (name.matches("^[a-zA-Z]*$")))
            return name;
        else
            throw new InputMismatchException("Name must only contains A-Z and a-z ");
    }

        public static void main(String[] args) {
                
                Scanner sc = new Scanner(System.in);
                try {
                    System.out.println("Enter a name");
                    String name=sc.nextLine();
                    String a=validName(name);
                    System.out.println("Your name is correct..");
                    
                    } catch(InputMismatchException e) {
                        System.out.println(e);
                }
        }
}

The program will read a String name, and will throw the exception if the name contains any other character other than "A-Z" or "a-z".

I hope the program helps you. Please give a positive rating if the answer helps you. Feel free to ask for any doubts in the comments section. Happy Chegging and Happy Coding