JXDatePickerで選択できる日付の範囲を限定する

Calendar.java

import org.apache.commons.lang3.time.DateFormatUtils;
import org.apache.commons.lang3.time.DateUtils;
import org.jdesktop.swingx.JXDatePicker;
import javax.swing.*;
import java.awt.*;
import java.util.Date;
import java.util.TimeZone;

public class Calendar extends JPanel {
	private JXDatePicker datePicker;
	public Calendar(){
		initDatePicker();
	}
	private void initDatePicker(){
		Date tomorrow = DateUtils.addDays(new Date(), 1);
		Date oneWeekAfter = DateUtils.addDays(new Date(), 7);

		datePicker = new JXDatePicker(tomorrow);
		datePicker.getMonthView().setLowerBound(tomorrow);
		datePicker.getMonthView().setUpperBound(oneWeekAfter);

		UIManager.put("JXMonthView.unselectableDayForeground", Color.GRAY);
		add(datePicker);
	}
	public String getDate() {
		return DateFormatUtils.format(
				datePicker.getDate(),
				"yyyy-MM-dd",
				TimeZone.getTimeZone("GMT")
		);
	}
}

class Window {
	public static void main(String[] args) throws Exception {
		JFrame frame = new JFrame();
		frame.setSize(200, 200);

		Calendar calendar = new Calendar();
		frame.add(calendar);

		SwingUtilities.updateComponentTreeUI(frame);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setVisible(true);
	}
}