Multithreading Assignment In this homework, you will implement a multithreaded solution to finding the sum of...

Multithreading Assignment

In this homework, you will implement a multithreaded solution to finding the sum of 9,000,000 double values.

Begin, by creating a method that creates an array (not an arrayList) of 9000000 double’s and populates each index with a random number.

Create a class to hold the sum of all the numbers in the array. Protect access to that sum by using a ReentrantLock appropriately. This means that only methods in this class can access or modify the array and they should ALL lock the lock on entry and unlock upon exit even if just looking at a value. Make sure you use good object oriented techniques in creating this class.

Then, create a Runnable that can sum an array of any length and add that sum to a shared total. Separate the array into a minimum of 10 pieces and launch a thread to sum each of the pieces. You probably want more threads, but experiment to find number of threads that seems to sum the quickest.

When all threads are done summing their pieces, show the combined sum of all 9,000,000 pieces

Extra credit (up to 15 points out of 100) for creating a JavaFX GUI that graphically shows the percentage of the array summed and the growing sum.

Grading Criteria

Creates Runnable class sums an array	25
Appropriately launches at least 10 separate threads – more is fine	15
Updates the sum correctly	15
Appropriately protects shared data (sum) with lock(s)	15
Prints total sum in a readable fashion	15
Meets coding standards	15

Solutions

Expert Solution

venereology answered 7 months ago

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