Event - Part of the Event Planner Application

/*
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 * and open the template in the editor.
 */
package eventplanner;

/**
 *
 * @author joshua
 */
public class Event
{

    private int day;
    private int month;
    private int year;
    private int hour;
    private String agenda;
    private static int[] monthList=new int[13];
    private static int[] dayList=new int[32];
    private static int[] yearList=new int[201];
    private static int[] hourList=new int[24];

    /* Test Data for Debugging

    public static void main(String args[])
    {
        Event test = new Event(5,20,2013,-1,"Test");
        Event test2 = new Event(5,21,2013,4,"Test2");
        System.out.println(test.getEvent());
        System.out.println();
        System.out.println(test2.getEvent());
    }
    */

    public Event()
    {
        month=1;
        day=1;
        year=2001;
        hour=-1;
        agenda="Unknown";
        dayList[day]++;
        monthList[month]++;
        yearList[year-1900]++;
    }

    public Event(int month, int day, int year, int hour, String agenda)
    {
        this.month=month;
        this.day=day;
        this.year=year;
        this.hour=hour;
        this.agenda=agenda;
        dayList[this.day]++;
        monthList[this.month]++;
        yearList[this.year-1900]++;
        if(hour!=-1)
        {
            hourList[this.hour]++;
        }

    }

    public int getDay()
    {
        return day;
    }

    public int getMonth()
    {
        return month;
    }

    public int getYear()
    {
        return year;
    }

    public int getHour()
    {
        return hour;
    }

    public String getAgenda()
    {
        return agenda;
    }

    public String getEvent()
    {
        if(getHour()>=0)
        {
            return(getMonth() + " " + getDay() + " " + getYear() + " " + getHour() + "\n" + getAgenda());
        }
        else
        {
            return(getMonth() + " " + getDay() + " " + getYear() + "\n" + getAgenda());
        }
    }

    public static Event[] sortDates(Event[] event)
    {
        Event aDate=null;
        Event bDate=null;
        int stop=getEventLength(event);
        for(int i=0;i<stop-1;i++)
        {
            for(int j=0;j<stop-1;j++)
            {
                aDate=event[j];
                bDate=event[j+1];
                if(!aDate.isDateGreater(bDate))
                {
                    event[j+1]=aDate;
                    event[j]=bDate;
                }
            }
        }
        return event;
    }

    public boolean isDateGreater(Event event)
    {
        boolean greater=false;
        if(event!=null && this!=null)
        {
            if(event.year>this.year)
            {
                greater=true;
            }
            else if(event.year==this.year && event.month>this.month)
            {
                greater=true;
            }
            else if(event.year==this.year && event.month==this.month && event.day>this.day)
            {
                greater=true;
            }
            else if(event.year==this.year && event.month==this.month && event.day==this.day && event.hour>this.hour)
            {
                greater=true;
            }
        }
        return greater;
    }

    public static int getEventLength(Event[] event)
    {
        int count=0;
        for(int i=0;i<event.length;i++)
        {
            if(event[i]!=null)
            {
                count++;
            }
        }
        return count;
    }

    public String displayEvent()
    {
        if(getHour()>=0)
        {
            return(getMonth() + "/" + getDay() + "/" + getYear() + " " + "Hour: " + getHour() + "\n" + getAgenda());
        }
        else
        {
            return(getMonth() + "/" + getDay() + "/" + getYear() + " " + "\n" + getAgenda());
        }
    }

}