serversocket.accept（）何时会引发异常？ 【JAVA]

Question

I want to have a counter of how much incoming connections I have per second. That means, I have made a loop like this one:

int incomingConnections;
while(true) {
  try {
     Socket socket = serverSocket.accept();
     incomingConnections++;
  } catch (Exception ex) {
  }

Before, I started a TimerTask like this:

new Timer().scheduleAtFixedRate(new TimerTask() {
            @Override
            public void run() {
                System.out.println("TimerTask: " + incominConnections + " incoming Connections while the last second.");
                incominConnections = 0;
            }
        }, 0, 1000);

What do I need to do, because I want the int only to count when it accepts a connection succesfull, not everytime it iterates the loop. Any help out there? Thx

Answer 1

Your code already does what you want.

The Java documentation for ServerSocket.accept() states that it:

Listens for a connection to be made to this socket and accepts it. The method blocks until a connection is made.

So because the call to accept blocks, you will only ever increment your counter if a connection is successfully made.

If an exception is thrown in the call to accept() you will enter the catch block, without executing the code that increments the counter.