CalendarTest.java

package CalendarTest;

import java.time.DayOfWeek;
import java.time.LocalDate;

/**
 * @author Cay Horstmann
 * @version 1.5 2015-05-08
 */
public class CalendarTest {
    public static void main(String[] args) {
        LocalDate date = LocalDate.now();
        int month = date.getMonthValue();
        int today = date.getDayOfMonth();

        date = date.minusDays(today - 1); // Set to start of month
        DayOfWeek weekday = date.getDayOfWeek();
        int value = weekday.getValue(); // 1 = Monday, ... 7 = Sunday

        System.out.println("Mon Tue Wed Thu Fri Sat Sun");
        for (int i = 1; i < value; i++) {
            System.out.println("    ");
        }

        while (date.getMonthValue() == month) {
            System.out.printf("%3d", date.getDayOfMonth());
            if (date.getDayOfMonth() == today) {
                System.out.print("*");
            } else {
                System.out.print(" ");
            }
            date = date.plusDays(1);
            if (date.getDayOfWeek().getValue() == 1)
                System.out.println();
        }

        if (date.getDayOfWeek().getValue() != 1)
            System.out.println();
    }
}