如果用户没有输入数字，如何在输入部分插入NumberFormatException并显示"Input error“

import java.util.Scanner;

public class InputExample {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入一个数字：");

        try {
            int number = Integer.parseInt(scanner.nextLine());
            System.out.println("输入的数字是：" + number);
        } catch (NumberFormatException e) {
            System.out.println("Input error");
        }
    }
}