一个区块链投票java程序的输入出现循环问题

如何解决一个区块链投票java程序的输入出现循环问题

如果有人能帮我解决这个我想测试的程序，我会非常感激。这是一个基于区块链的电子投票程序。

我遇到的问题是第一个选项，Cast Votes。它要求角色，为了让它工作，你首先需要运行服务器，然后运行将连接到服务器的客户端。因此，当您在输入上输入 server 时，一切正常，但是，您尝试输入将客户端连接到服务器的客户端 server_address 端口，但它什么也不做。

private static final String DEFAULT_SERVER_ADDR = "localhost";
private static final int DEFAULT_PORT = 6777;

/*
 * Everything starts from here!
 */
public static void main(String[] args) {
    /*int clientId=0;*/
    System.out.println(" ----- MAIN MENU ----- \n");
    System.out.println("1. Cast Votes");
    System.out.println("2. View Votes on Blockchain");
    System.out.println("3. Count Votes");
    System.out.println("0. Exit\n");

    Scanner scanner = new Scanner(system.in);

    System.out.println("Enter your choice: ");
    int ch = scanner.nextInt();

    if(ch == 1)
    {
        System.out.println("\n ----- Casting Votes ----- \n");
        System.out.println("Please choose a role you want to be: server or client.");
        System.out.println("server PORT - The port to listen to; \"6777\" is default port.");
        System.out.println("client SERVER_ADDRESS PORT - The server address and port to connect to; \"localhost:6777\" is default address-prt combination.");
        System.out.println("Make sure run the server first and then run client to connect to it.");
        System.out.println("> ---------- ");

        Scanner in = new Scanner(system.in);
        String line = in.nextLine();
        String[] cmd = line.split("\\s+");

        if (cmd[0].contains("s"))
        {   // server selected

            /* work as server */
            int port = DEFAULT_PORT;
            if (cmd.length > 1) {
                try {
                    port = Integer.parseInt(cmd[1]);
                } catch(NumberFormatException e) {
                    System.out.println("Error: port is not a number!");
                    in.close();
                    return;
                }
            }

            ServerManager _svrMgr =new ServerManager(port);
            new Thread(_svrMgr).start();


        }
        else if (cmd[0].contains("c"))
        {
            //client selected

            /* work as client */
            String svrAddr = DEFAULT_SERVER_ADDR;
            int port = DEFAULT_PORT;
            if (cmd.length > 2) {
                try {
                    svrAddr = cmd[1];
                    port = Integer.parseInt(cmd[2]);
                } catch(NumberFormatException e) {
                    System.out.println("Error: port is not a number!");
                    in.close();
                    return;
                }
            }

            ClientManager _cltMgr = new ClientManager(svrAddr,port);

            /* new thread to receive msg */
            new Thread(_cltMgr).start();

            _cltMgr.startClient();
        }
        else {
            showHelp();
            in.close();
            return;
        }
        in.close();
    }