java - 未抛出 SocketTimeoutException

Question

以下代码应根据是否达到超时抛出异常:

public boolean isAlive(int workerNum) throws Exception
{
    System.out.println("Checking worker #" + workerNum + " from " + 
        getWorkerAddress(workerNum)
        + " at port " + getWorkerPort(workerNum));

    DatagramPacket packet = new DatagramPacket("__ping__".getBytes(), "__ping__".length(), 
                getWorkerAddress(workerNum), getWorkerPort(workerNum));
    socket.setSoTimeout(10000);
    try {
        System.out.println("Checking worker #" + workerNum);
        socket.send(packet);
    } catch (SocketTimeoutException  e) {
        e.printStackTrace();
        return false;
    }
    return true;
}

我已经尝试了所有可能的情况，并且我可以保证数据包永远不会被抛出，因为它永远不会在另一端收到。知道为什么吗？非常感谢任何帮助!

Answer 1

The following code should throw an exception based on whether a timeout was reached:

不，不应该。 DatagramSocket.setSoTimeout() 设置读取超时。对写作没有影响。