这个空格怎么优雅去掉

Question

这是一个使用UDP实现的简单聊天程序
接收端

public class TalkRecrive implements Runnable{
    DatagramSocket socket = null;
    private int port;
    private String msgFrom;
    public TalkRecrive(int port,String msgFrom){
        this.msgFrom = msgFrom;
        this.port = port;
        try{

            socket = new DatagramSocket(port);
        }catch (Exception e){
            e.printStackTrace();
        }
    }


    @Override
    public void run() {
        while (true){
            try {
                //准备接收包裹
                byte[] container = new byte[128];
                DatagramPacket packet = new DatagramPacket(container, 0, container.length);
                socket.receive(packet);

                //输出
                byte[] data = packet.getData();
                String receiveData = new String(data,0,data.length);
                System.out.println(msgFrom+": "+receiveData);
                //断开连接
                if (receiveData.equals("bye")){
                    break;
                }

            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        socket.close();
    }
}

发送端

public class TalkSend implements Runnable{

    DatagramSocket socket = null;
    BufferedReader reader = null;

    private int fromPort;
    private String toIP;
    private int toPort;

    public TalkSend(int formPort, String toIP, int toPort) {
        this.fromPort = formPort;
        this.toIP = toIP;
        this.toPort = toPort;
        try{
            socket = new DatagramSocket(fromPort);
            reader = new BufferedReader(new InputStreamReader(System.in));

        }catch (Exception e){
            e.printStackTrace();
        }
    }

    @Override
    public void run() {
        while (true){
            try {
                String data = reader.readLine();
                byte[] datas = data.getBytes();
                DatagramPacket packet = new DatagramPacket(datas, 0, datas.length, new InetSocketAddress(String.valueOf((this.toIP)), this.toPort));
                socket.send(packet);
                if (data.equals("bye")){
                    break;
                }

            } catch (Exception e) {
                e.printStackTrace();
            }
        }
       socket.close();
    }
}

模拟Teacher与Student聊天程序代码

public class TalkStudent {

    public static void main(String[] args) {
        //开启两个线程
        new Thread(new TalkSend(7777,"localhost",9999)).start();
        new Thread(new TalkRecrive(8888,"老师")).start();
    }
}

class TalkTeacher {

    public static void main(String[] args) {
        new Thread(new TalkSend(5555,"localhost",8888)).start();
        new Thread(new TalkRecrive(9999,"学生")).start();
    }
}

输出结果

输出结果中这个空格怎么变成这样了，怎么解决啊，为啥会出现这种情况啊

Answer 1

可以对输入的语句做去除空格操作；
我这边运行没遇到你那种情况，输入空格，另外一边响应也是正常的空格

如果是乱码，可以加入utf-8转一下

String receiveData = new String(data, 0, data.length, StandardCharsets.UTF_8);