在第16行从二维数组输入获取InputMismatchException，但我似乎不明白为什么

import java.util.InputMismatchException;
import java.util.Scanner;

public class ArrayInputExample {
    public static void main(String[] args) {
        int[][] matrix = new int[3][3];
        
        Scanner scanner = new Scanner(System.in);
        
        try {
            for (int i = 0; i < 3; i++) {
                for (int j = 0; j < 3; j++) {
                    System.out.print("Enter element at position (" + i + ", " + j + "): ");
                    matrix[i][j] = scanner.nextInt();
                }
            }
        } catch (InputMismatchException e) {
            System.out.println("Invalid input. Please enter integers only.");
        }
        
        scanner.close();
    }
}