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I guess you need to ask the prof why you are required to use bluej.

Perhaps the professor knows that you can't copy and paste code onto a forum when you use bluej, to keep students from getting too much help on a forum.

Sorry, I know nothing about bluej.
I'm used to working with the javac compiler and the java program to execute java programs.
The javac compiler creates one or more class files, one of which has...

Where do you currently display the time? How does the prof want the time to be displayed?

How do you execute this code? Where is the main method and the calls to methods in your code?