public class Main {
    public static void main(String[] args) {
        Integer a = 10, b = 10, c = 12345, d = 12345;
        System.out.println("Сравнение по ссылке:");
        System.out.println(a == b);
        System.out.println(c == d);
        System.out.println("Сравнение по значению:");
        System.out.println(a.equals(b));
        System.out.println(c.equals(d));
    }
}