Please review my Lesson 1 Homework

Question

This app uses a single timer to run two tasks, a 5 minute task and a 30 second task.  Both tasks use callbacks to communicate with the MIDlet.  The 5 minute task starts the 30 second task on odd 5 minute periods and cancels it on even 5 minute periods. 
I am particularly interested in receiving comments about my naming.  I am not sure my names follow good Java conventions.  If they don't, please give me a recommendation on how I should rename them. 
Thank you!!!!
ClarkS

Answer 1

I ll try to comment on the code as per your request . I might be right or wrong after all programming is art and that what makes us special (each person has it way)
1- Lets say i have a class Student
when i want to create an instance of Student Class i ll name it : Student student = new Student();
So that goes for your class
FiveMinuteTask fiveMinuteTask = new FiveMinuteTask(timer);
Big capital , then low capital
2- Date now = new Date();
I would do the following:
calendar.get(calendar.MINUTE)
calendar.get(calendar.SECOND)
There is no need to substring
3- The task 2 is called inside task 1 (Thirty second is called from fiveMinute Class)
I would not do that for the following reason :
What if i want to use fiveMinuteTask to call another class than thirtySeconds ! i can not do that with your code
So i would rather do the following
In my Callback timeReached inside my imlet Lesson_1_Homeword ,  i would call the second class thirty second
so the logic in turning on and off thirtySecond task will be inside the main class ans not inside the first Task class.
Note:
There is 3 most popular conventional way for naming in Java or other programming languages , mostly its good to stick to one
the first one is exemple :
MyFirstLesson
The second would be
My_first_lesson
or
My_First_Lesson
Inside your class you use the first Way so stick to it and use it on everything even of file names and so .
Hope that helps , And as i said i might be wrong in many ways after all its a taste