Простая проверка для Java

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        final int MIN_VALUE = 0;
        final int MAX_VALUE = 100;
        boolean isIncorrect;
        Scanner scanner = new Scanner(System.in);
        int number = 0;

        do {
            isIncorrect = false;

            try {
                number = Integer.parseInt(scan.nextLine());
            } catch (NumberFormatException e) {
                isIncorrect = true;
                System.out.println("Type error!");
            }

            if (!isIncorrect && (number < MIN_VALUE || number > MAX_VALUE)) {
                isIncorrect = true;
                System.out.println("Range error!");
            }
        } while (isIncorrect);
        scanner.close();

        System.out.print(number);
    }
}