class SettingParallelism {

​

    public static void main(String[] args) throws InterruptedException, ExecutionException {

        System.out.println(Runtime.getRuntime().availableProcessors());

        System.setProperty("java.util.concurrent.ForkJoinPool.common.parallelism", "2");

        System.out.println(ForkJoinPool.getCommonPoolParallelism());

        ForkJoinPool pool = new ForkJoinPool(2);

        List<Employee> list = new ArrayList<>();

        for (int i = 0; i < 100; i++) {

            list.add(new Employee("John", 20000));

            list.add(new Employee("Rohn", 3000));

            list.add(new Employee("Tom", 15000));

            list.add(new Employee("Bheem", 8000));

            list.add(new Employee("Shiva", 200));

            list.add(new Employee("Krishna", 50000));

        } 

        long count = pool.submit(() ->

        list.parallelStream()

        .filter(e -> e.getSalary() > 1000)

        .count()).get();

        System.out.println(count);

​

        //Computational Intensive

//      Number of threads <= number of cores

        //IO intensive

//      Number of threads > Number of cores

    }

​

}

​