error

while compiling my code i get such errors:
Class java.util.Calendar is abstract;cannot be instantiated at line *;
Constructor Calendar() has protected access in class java.util.Calendar at line *;
and that line is:
Calendar cal = new Calendar();
what could be the solution of this problem.

You might need to use a "concrete subclass of Calendar", GregorianCalendar, see the following link for more info:
http://java.sun.com/j2se/1.3/docs/api/java/util/GregorianCalendar.html

thanx