New behaviour?

Question about the task

Caching

Java Multithreading, Level 9, Lesson 9

Under discussion

Hey! I've solved this task by following the instructions but I can't figure out how this

return computable.compute(arg);

calls the Square compute method when arg is an int and calls Copyright compute method if a Copyrigth.Period object is passed as arg.

Comments (1)

Popular
New
Old

You must be signed in to leave a comment

Guadalupe Gagnon

Level 37 , Tampa, United States

12 April 2021, 02:13

The lines in the main method where the CacheComputeManager objects are created are passed objects that are of the Computable interface and they are used in the correct processing within the CacheComputeManager object. The first CacheComputeManager object is passed a Square object which is used in the next couple of lines for when ints are passed to it. The second CacheComputeManager object is passed a CopyRight object, which in turn is used for the next few lines where new 'CopyRight.Peroid' objects are passed in. If you passed the wrong type in then an Exception, most likely IllegalArgumentException, would occur.