import java.util.Calendar;
import java.util.GregorianCalendar;
import java.util.Date;

public class FirstOfMonth
{
int m;
int y;
int x;

public FirstOfMonth()
{
}

public void setFirstOfMonth(int month, int year)
{
    m = month;
    y = year;

    GregorianCalendar cal = new GregorianCalendar(y, m, 1);
    x = cal.get(Calendar.DAY_OF_WEEK);
}

public double getFirstOfMonth()
{
    return x;
}

}

GregorianCalendar cal = new GregorianCalendar(y, m-1, 1);