为什么我的计时器任务不适用于我的 Discord API 包装器？

Question

I'm making an API wrapper for Discord and I'm trying to send a heartbeat payload at the interval given in the hello payload.

private void handleReceive(GatewayReceive gatewayReceive)
{
    PayloadReceiveOpcode opcode=PayloadReceiveOpcode.getInstance(gatewayReceive.op);
    if(opcode==null)
    {
        //TODO Add throws here or something
        return;
    }
    switch(opcode)
    {
        case DISPATCH:
            try
            {
                System.out.println(gatewayReceive.t);
                client.getEventManager().handle(gatewayReceive.t,gatewayReceive.d);
            }
            catch(InvocationTargetException|IllegalAccessException e)
            {
                e.printStackTrace();
            }
            break;
        case HEARTBEAT:
            break;
        case RECONNECT:
            break;
        case INVALID_SESSION:
            break;
        case HELLO:
            new Timer().scheduleAtFixedRate(new TimerTask(){
                @Override
                public void run()
                {
                    send(new GatewaySend(PayloadSendOpcode.HEARTBEAT,"null"));
                }
            },0,gatewayReceive.d.get("heartbeat_interval").getAsInt());
            break;
       case HEARTBEAT_ACK:

    }
}

It's supposed to send it at the interval, but it only sends it once. There are no errors.

Answer 1

I fixed it by making it not a daemon thread, so it will keep the program running while the loop is running, using this code timer=new Timer(false); . However, I will make a new main loop instead of using this one to keep the program running.