Question

我正在使用BBEdit，它似乎认为每个'}'放在“你好”之后|| “嗨”如果陈述无法比拟，这显然不是真的。终端也认为这一点，因为它引发了一个关于没有'捕获'的'尝试'的错误。我想知道是否有人有同样的问题和/或知道解决方案？

提前致谢！

class client_handler extends Thread {
    private Socket conn;
    client_handler(Socket conn) {
        this.conn = conn;
    }
    public void run() {
        String line, input="";

        String username;
        String password;
        String UID;

        Map<String, String> database_UID = new HashMap<String, String>();
        database_UID.put("admin", "1234");

        try {
            //Fetches the socket reading and writing streams
            DataInputStream in = new DataInputStream(conn.getInputStream());
            PrintStream out = new PrintStream(conn.getOutputStream());

            //Sends a welcome message to new client
            out.println("Welcome to the server\nType your username and password like:\nUsername_Password");

            //Begins to read input from the client
            while((line = in.readLine()) != null && !line.equals(".")) {
                //The server replies with the same message
                if(line.equalsIgnoreCase("server_quit")) {
                    //Tells the server the command was given
                    System.out.println("Given command 'server_quit', closing client connection at "+conn.getPort());
                    //Tells the user that the server is closing
                    out.println("Quitting the server...\nHave a nice day!");
                    conn.close();
                }
                if(line.equals("admin_"+database_UID.get("admin") {
                    out.println("Welcome back, Admin!");
                }
                if(line.equalsIgnoreCase("hello") || line.equalsIgnoreCase("hi")) {
                    out.println("Good day!");
                }
            }
            System.out.println("Client terminated at "+conn.getPort());
            conn.close();
        }
        catch(IOException e) {
            System.out.println("IOException on socket: "+e);
            e.printStackTrace();
    }
}

Answer 1

查看上面一行的括号：

 if(line.equals("admin_"+database_UID.get("admin") {

3开，1关。那不对。检查此类事物（括号，大括号）时从零开始。添加一个用于打开，减去一个用于关闭。如果你不以零结束，那你就错过了一些（或者如果你最终结果为负数则加了一些）。

Answer 2

if (line.equals("admin_" + database_UID.get("admin"))) {

最后一个}

Answer 3

试试这个：

if (line.equals("admin_" + database_UID.get("admin"))) {

而不是

if(line.equals("admin_"+database_UID.get("admin") {

为什么我的Telnet程序的一部分抛出错误的'}'错误？

3 个答案: