Question

{ Question 15 (3 points (Bonus) Given the following statemens, it may throw Input MismatchException. Adding exception handler to ask the user to provide input again when the exception happens String keepGoing = "y": Scanner scan = new Scanner(System in): while (keepGoing equals("") | keepCoing equals("Y")) System.out.println("1:Add a student"); System.out.println("2. Remove a student"); System.out.println("3:View a student record"); System.out.print("Your choice? (1/2/3) "); int choice = scan.nextinto: System.out.print("Try again? (yn) "); keepGoing = scan nextLine): System.out.println("Bye."); } Format BIU In java

Answer 1

Code with exlanataion:

package menu_Exception;

import java.util.*;

public class Main{

public static void main(String []args){
String keepGoing = "y";
Scanner scan = new Scanner(System.in);
while(keepGoing.equals("y") || keepGoing.equals("Y"))
{
System.out.println("1:Add a student");
System.out.println("2:Remove a student");
System.out.println("3:View a student record");
System.out.println("Your choice?(1/2/3) ");
//add try catch to handle exception
try{
   int choice=scan.nextInt();
}
catch (InputMismatchException e)
{
   //print invalid choice and call main() function again
   //to input again
   System.out.print("Invalid choice.\n\n");
   System.out.println("Enter your choice again...");
   main(args);
}
System.out.println("Try again? (y/n) ");
keepGoing = scan.next();
}
System.out.println("Bye");
}
}

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Output:

Main.java X 1 package menu_Exception; 2. 3 import java.util.*; e Console x Main (14) [Java Application] C:\Progra 1: Add a student 2: Remove a student 3:View a student record Your choice? (1/2/3) 4 n 76 Invalid number of students. 9 10 { Enter your choice again... 1: Add a student 2: Remove a student 3:View a student record Your choice?(1/2/3) 14 5 public class Main{ 6 public static void main(String []args) { 8 String keepGoing = "y"; Scanner scan = new Scanner(System.in); while(keepGoing.equals("y") || keepGoing.equals("Y")) 11 12 System.out.println("1: Add a student"); 13 System.out.println("2: Remove a student"); System.out.println("3:View a student record"); 15 System.out.println("Your choice?(1/2/3) "); 16 //add try catch to handle exception 17 try{ 18 int choice=scan.nextInt(); 19 20 catch (InputMismatchException e) 21 22 //print invalid choice and call main() function again 23 //to input again 24 System.out.print("Invalid choice.\n\n"); 25 System.out.println("Enter your choice again..."); 26 main(args);| 27 28 System.out.println("Try again? (y/n) "); 29 keepGoing = scan.next(); 30 31 System.out.println("Bye"); 32 33 } } { } }