29. 在下面附属类方法中的下划线处，应填入的正确参数是______。
public void writeData( ) throws IOException
{
GregorianCalendar calendar = new GregorianCalendar();
calendar.setTime(hireDay);
out.println(name + "|"
+ salary + "|"
+ calendar.get(Calendar.YEAR) + "|"
+ (calendar.get(Calendar.MONTH) + 1) + "|");
}
