JDatePicker弹出位置

Question

我使用org.jdatepicker.impl.JDatePanelImpl让用户选择弹出日历的日期。

问题是当组件位于窗口的底部时，弹出日历显示在组件下方，用户无法选择日期。

有没有办法让弹出窗口显示在JDatePicker组件上方？

import java.awt.Dimension;
import java.util.Properties;

import org.jdatepicker.impl.JDatePanelImpl;
import org.jdatepicker.impl.JDatePickerImpl;
import org.jdatepicker.impl.UtilDateModel;

public class MyDatePicker{

    JDatePanelImpl jDatePickerPanel;
    JDatePickerImpl datePicker;

    public MyDatePicker(){

        UtilDateModel model = new UtilDateModel();
        //model.setDate(20,04,2014);
        Properties p = new Properties();
        p.put("text.today", "Today");
        p.put("text.month", "Month");
        p.put("text.year", "Year");
        jDatePickerPanel=new JDatePanelImpl(model, p);

        //datePicker.
        //jDatePickerPanel.getComponentPopupMenu().setLocation(100, 100);
        datePicker = new JDatePickerImpl(jDatePickerPanel, new DateLabelFormatter());

    }

    public JDatePickerImpl datePicker(){

        return datePicker;
    }

    public JDatePanelImpl datePickerPanel(){

        return jDatePickerPanel;
    }

    public void setColumns(int columns){

        datePicker.getJFormattedTextField().setColumns(columns);
    }

}