Hello Java fork/join for Java

1, example

Import Java.util.concurrent.recursivetask;public class Calculator extends recursivetask<integer> {        private static final int THRESHOLD = 4;      private int start;      private int end;        Public Calculator (int start, int end) {          This.start = start;          This.end = end;      }        @Override      protected Integer Compute () {          int sum = 0;          if ((End-start) < THRESHOLD) {for              (int i = start; i<= end;i++) {                  sum + = i;              }            System.err.println (">>>>>>>>");        } else{              int middle = (start + end)/2;              Calculator left = new Calculator (start, middle);              Calculator right = new Calculator (middle + 1, end);              Left.fork ();              Right.fork ();                sum = Left.join () + Right.join ();          }          return sum;      }    }  

2 run

Import Java.util.concurrent.forkjoinpool;import Java.util.concurrent.future;public class Test {/** * @param args * @ Throws Exception  * @throws interruptedexception  

Hello Java fork/join for Java