分支合并框架

 /**
     * 分支合并框架
     */
    public static void main(String[] args) throws Exception {
        MyTask myTask=new MyTask(0,100);
        ForkJoinPool pool=new ForkJoinPool();//创建一个池子
        ForkJoinTask<Integer> submit = pool.submit(myTask);
        System.out.println(submit.get());
        pool.shutdown();
    }
}
class MyTask extends RecursiveTask<Integer>{
    private static final Integer ADJUST_VALUE=10;
    private int begin;
    private int end;
    private int result;
    public MyTask(int begin, int end) {
        this.begin = begin;
        this.end = end;
    }
    @Override
    protected Integer compute() {
        if((end-begin)<=ADJUST_VALUE){
            for (int i=begin;i<=end;i++){
                result+=i;
            }
        }else {
            int middle=(end+begin)/2;
            MyTask task=new MyTask(begin,middle);
            MyTask task1=new MyTask(middle+1,end);
            task.fork();
            task1.fork();
            result=task.join()+task1.join();
        }
        return result;
    }