Concurrent

1. 不太懂的 class,
其中 ExecutorService 為一個 create thread 的東東, 需要再研究.
{{{

Future[] futures = new Future[numThreads];
Operator[] operators = new Operator[numThreads];

ExecutorService es = Executors.newCachedThreadPool();

for (int i = 0; i < numThreads; i++) {
operators[i] = new Operator(subLists[i], mode, flag);
futures[i] = es.submit(operators[i]);
}


}}}

2.
特別的是 Callable 類似 Thread 方式
/**
* Operator is a thread for sequencial job operation.
*
* @author hclee
*/
class Operator implements Callable {
public List call() {
}
}