I am trying to use a JOption pane to recieve an input, and use a scanne and next

Question

I am trying to use a JOption pane to recieve an input, and use a scanne and nextInt to read through the string and read exactly 3 integers. Additionally it is supposed to be in a try catch block so that it throws an exception if the integers inputed are not 3 ints seperated by spaces. I will catch these exceptions in another method. Additionally, I need to be able to take these numbers and input them into a constructor as shown. How do I use a scanner and nextInt to make sure the input is exactly 3 integers? and how do I format them into a try catch block. Also, do I need to create an ArrayList or array to handel the numbers so I can use them in my constructor?

Combination comb = new Combination( num1, num2, num3 ); then I use comb to create lock.

       Lock lock = new Lock( upper, comb );

   public void resetNaive() {

       String message = JOptionPane.showInputDialog(null, "Type a new combination");

       try{

       Scanner scanner = new Scanner(message);

       int count = scanner.nextInt();

       if(count != 3){

           throw new InvalidLockCombinationException();

       }

       for (int i = 0; i < 3; i++){

           arr[i] = scanner.nextInt();

       }

       }

}

Explanation / Answer

Hi,

I have modified a code as per your requirement. Please find the below code and higlighted the code changes below.

public static void resetNaive() {
String message = JOptionPane.showInputDialog(null, "Type a new combination");
message = message.trim();
try{
  
int count = message.length();
if(count != 3){
   throw new InvalidLockCombinationException();
}
Scanner scanner = new Scanner(message);
int n = scanner.nextInt();
}
catch(InputMismatchException e){
   System.out.println("Given input is not an integer");
}
}

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