​

public class prog {

    public static void main(String[] args) {

        Calendar time = Calendar.getInstance();

        System.out.println(time.getTime());

        time.set(Calendar.YEAR, 2020);

        System.out.println(time.getTime());

        time.set(1982, 1, 19);  // 1은 2월을 나타냄.

        System.out.println(time.getTime());

        time.set(1982, 1, 19, 12, 34, 56);

        System.out.println(time.getTime());

    }

}