ExecutorService.java

class Tasks {
    public static void main(String[] args) {
        ExecutorService executorService = Executors.newFixedThreadPool(3);
        executorService.submit(new Task1());
        executorService.submit(new Task2());
        executorService.submit(new Task3());

        executorService.shutdown();
    }
}

/*

Output:

T1 is running on thread pool-1-thread-1
Computed prime number 17
T2 is running on thread pool-1-thread-2
Computed prime number 23
T3 is running on thread pool-1-thread-3
Computed prime number 13
Successfully put 23 in the database
Successfully put 17 in the database
Successfully put 13 in the database


*/