Java 线程立即终止

Question

I am trying to do some parallel http calls and database writing using threads in Java. The roblem is that after calling thread.start() the thread does not call the run method but goes into TERMINATED state instantly.

while (fromIndex < list.size()) {
                final int toIndex = fromIndex + batchSize > list.size() ? list.size() : fromIndex + batchSize;
                fromIndex += batchSize;
                final int fromIndexCopy = fromIndex;
                threads[i] = new Thread() {
                    @Override
                    public void run(){
                        processConsumptionHistory(requestContext, list.subList(fromIndexCopy, toIndex), listFinished,
                                listFailed, listEnd);
                        markFailedUsage(listFailed);
                    }
                };
                threads[i].start();
                i++;
            }

            for (final Thread thread : threads) {
                thread.join();
            }

Why do threads not run? Is there a better alternative?

EDIT

Threads do get started, the problem is that the lists passed are empty.

Answer 1

You probably wanted to reverse the order of these two statements:

fromIndex += batchSize;
final int fromIndexCopy = fromIndex;