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y wont this code work, Paycalc.class is compiled and in a dir called epcpackage, along with an Employee class. The epcpackage is imported into the Epc class that tries to use this code. Paycalc receives a string and an int, and should give back a double value:
EPC CLASS CODE, PACKAGE CLASS UTILISATION:
payamount = Paycalc(empid, hours); //return a double value
I have this at bottom of Paycalc to return a "payrate * Hours" double value:
return hrs*payratenum2;

Answer 1

im new at this, so please bear with me
my classes in my package have a main method, i thought
that any values would be caught by the constructor,
then passed to the main method of each class?
Usually only one class in an Application has a main method and that is the one that is called to run the Application. All other classes (and the one with the main in it) have constructors that can be called by any cless that wants to. The constructor returns to the calling class an instance of the class just constructed using 'new'.
You better post some code (more than before) for me to help more.
If you post code please put \[code\] .... your code .... \[code\] around it. Note: Don't put the '\' in they are there to force this post to show them.
Finally, if I understand what you mean there is no way that a value will be caught by the constructor of a class and then passed to the main method. The:
  public static void main(String[] args) is called from the command line when you run the program. So if Paycalc has a line in it like the one above then on the command line you can type:
java.exe yourpackage.Paycalc
This will call the static main method in Paycalc which in turn then can do whatever it likes.