Java Program Improvements

Need this in a couple hours. Also, cannot increase price.

Make three improvements to the attached program related to (see below).

One of these improvements should be related to the use of thread. Also, ensure atomic operations for the threads occur concurrency ie., one thread cannot start until the other thread ends. The code needs to be readable with the new thread info, and ensure that the database closes after thread operations complete to prevent corruption, especially with thread operations.