java ThreadPoolExecutor 并发调用实例详解

package test.current;import java.util.ArrayList;import java.util.Arrays;import java.util.List;import java.util.concurrent.Callable;import java.util.concurrent.ExecutionException;import java.util.concurrent.Future;public class TestCallable {  public static void main(String[] args) throws InterruptedException, ExecutionException {    List<Callable<List<Long>>> tasks = new ArrayList<>();    for (int i = 0; i < 10; i++) {      Callable<List<Long>> task = new Callable<List<Long>>() {        @Override        public List<Long> call() throws Exception {          return Arrays.asList(1L,2L);        }      };      tasks.add(task);    }    List<Long> finalResults = new ArrayList<>(10);    List<Future<List<Long>>> results = ThreadPool.getThreadPool().invokeAll(tasks);    for(Future<List<Long>> ele : results) {      List<Long> list = ele.get();      finalResults.addAll(list);    }    System.out.println(finalResults);  }}

package test.current;import java.util.concurrent.ArrayBlockingQueue;import java.util.concurrent.ThreadPoolExecutor;import java.util.concurrent.TimeUnit;public class ThreadPool {  private static final int CORE_SIZE = 8;  private static final int MAX_SIZE = 12;  private static final long KEEP_ALIVE_TIME = 30;  private static final int QUEUE_SIZE = 50000;  private static ThreadPoolExecutor threadPool = new ThreadPoolExecutor(CORE_SIZE, MAX_SIZE, KEEP_ALIVE_TIME,      TimeUnit.SECONDS, new ArrayBlockingQueue<Runnable>(QUEUE_SIZE), new ThreadPoolExecutor.AbortPolicy());  public static ThreadPoolExecutor getThreadPool() {    return threadPool;  }}