Java异步方法调用

Question

我已经有一个线程必须完成以下工作:

public class DetectionHandler extends TimerTask {

@Override
public void run() {
bluetoothAddresses = BluetoothModule.scanAddresses();
wiFiAddresses = WiFiModule.scanAddresses();
...//when scanning is finished, continue work
}

我希望扫描是平行的。所以我假设我必须异步调用这两个方法。扫描完成后，我可以继续在 DetectionHandler 类中工作。

我尝试过 BluetoothModule 和 WiFiModule 实现 Runnable 的方式，但没有成功。发送

Answer 1

使用 ExecutorService你可以这样写:

ArrayList<Callable<Collection<Address>>> tasks = new ArrayList<Callable<Collection<Address>>>();
tasks.add(new Callable<Collection<Address>>() {
  public Collection<Address> call() throws Exception {
    return BluetoothModule.scanAddresses();
  }
});
tasks.add(new Callable<Collection<Address>>() {
  public Collection<Address> call() throws Exception {
    return WiFiModule.scanAddresses();
  }
});

ExecutorService executorService = Executors.newFixedThreadPool(2);
List<Future<Collection<Address>>> futures = executorService.invokeAll(tasks);