Java基础知识(十三)--线程池

// public static ExecutorService newFixedThreadPool(int nThreads)
ExecutorService pool = Executors.newFixedThreadPool(2);

// 可以执行Runnable对象或者Callable对象代表的线程
pool.submit(new MyRunnable());
pool.submit(new MyRunnable());

//结束线程池
pool.shutdown();

 多线程程序实现的方式3

// 创建线程池对象
ExecutorService pool = Executors.newFixedThreadPool(2);

// 可以执行Runnable对象或者Callable对象代表的线程
Future<Integer> f1 = pool.submit(new MyCallable(100));
Future<Integer> f2 = pool.submit(new MyCallable(200));

// V get()
Integer i1 = f1.get();
Integer i2 = f2.get();

System.out.println(i1);
System.out.println(i2);

// 结束
pool.shutdown();

public class MyCallable implements Callable<Integer> {

  private int number;

  public MyCallable(int number) {
    this.number = number;
  }

  @Override
  public Integer call() throws Exception {
    int sum = 0;
    for (int x = 1; x <= number; x++) {
      sum += x;
    }
    return sum;
  }

}