Question

我正在尝试使用套接字来接收消息执行此代码时，我得到NumberFormatException

public class ThreadSocket extends Thread {
    Socket socket;
    int k;

    ThreadSocket(Socket socket) {
        this.socket = socket;
    }

    public void run() {
        try {
            String message = null;
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
            while ((message = bufferedReader.readLine()) != null) {
                System.out.println("Incomming message client : " + message);
                k += Integer.parseInt(message);
                System.out.println("la somme est :" + k);
            }
            socket.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

此例外：

Exception in thread "Thread-0" java.lang.NumberFormatException: For input string: "3 : 2"
    at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
    at java.lang.Integer.parseInt(Integer.java:580)
    at java.lang.Integer.parseInt(Integer.java:615)
    at ThreadSocket.run(ThreadSocket.java:33)

Answer 1

我仍然不太确定套接字上收到的消息是什么。以下内容将接受client : number表单上的消息以及仅包含该号码的消息。确定这是否是你需要的。

        while ((message = bufferedReader.readLine()) != null) {
            System.out.println("Incomming message client : " + message);
            // is there a colon followed by a space in the message?
            final String delimiter = ": ";
            int indexOfColon = message.lastIndexOf(delimiter);
            if (indexOfColon == -1) { // no, no colon and space in message
                // try to use entire message
                k += Integer.parseInt(message);
            } else { // yes
                // take out the part after the colon and space and try parsing it as an integer
                int number = Integer.parseInt(message.substring(indexOfColon + delimiter.length()));
                k += number;
            }
            System.out.println("la somme est :" + k);
        }

Answer 2

您必须逐个转换输入字符串的数字。然后你可以分开它们。

数字格式输入字符串到整数的异常

2 个答案: