Question

我使用Netbeans编写程序但是想在终端中运行以检查是否正在运行套接字编程。我能够成功编译第一个文件ServerClient.java但无法运行。这是我的编程文件

ServerProgram.java

package echoserver;

public class ServerProgram {

/**
 * @param args the command line arguments
 */
public static void main(String[] args) {

    if (args.length != 1) {
        System.err.println("Usage: java Server <port number>");
        System.exit(1);
    }

    int portNumber = Integer.parseInt(args[0]);

    try (
        ServerSocket serverSocket =
            new ServerSocket(Integer.parseInt(args[0]));
        Socket clientSocket = serverSocket.accept();     
        PrintWriter out =
            new PrintWriter(clientSocket.getOutputStream(), true);                   
        BufferedReader in = new BufferedReader(
            new InputStreamReader(clientSocket.getInputStream()));
    ) {
        String inputLine;
        while ((inputLine = in.readLine()) != null) {
            out.println(inputLine);
        }
    } catch (IOException e) {
        System.out.println("Exception caught when trying to listen on port "
            + portNumber + " or listening for a connection");
        System.out.println(e.getMessage());
    }
}

}

ClientProgram.java

package echoserver;

public class ClientProgram {
public static void main(String[] args) throws IOException {

    if (args.length != 2) {
        System.err.println(
            "Usage: java Client <host name> <port number>");
        System.exit(1);
    }

    String hostName = args[0];
    int portNumber = Integer.parseInt(args[1]);

    try (
        Socket socket = new Socket(hostName, portNumber);
        PrintWriter out =
            new PrintWriter(socket.getOutputStream(), true);
        BufferedReader in =
            new BufferedReader(
                new InputStreamReader(socket.getInputStream()));
        BufferedReader stdIn =
            new BufferedReader(
                new InputStreamReader(System.in))
    ){
        String userInput;
        while ((userInput = stdIn.readLine()) != null) {
            out.println(userInput);
            System.out.println("socket: " + in.readLine());
        }
    } catch (UnknownHostException e) {
        System.err.println("Don't know about host " + hostName);
        System.exit(1);
    } catch (IOException e) {
        System.err.println("Couldn't get I/O for the connection to " +
            hostName);
        System.exit(1);
    } 
}

}

CMD：

Puja:echoserver pujadudhat$ javac ServerProgram.java
Puja:echoserver pujadudhat$ $javac ServerProgram.java -d
-bash: ServerProgram.java: command not found
Puja:echoserver pujadudhat$

Answer 1

编译代码如下：

$javac YourJavaFileName.java -d .

在您的情况下：$javac ServerProgram.java -d .。

然后按以下方式运行：

$java PackageName.ClassName

在您的情况下：java echoserver.ServerProgram。

您可以引用其他类似的question here。

我无法在Terminal Mac os中运行我的javaProgram

1 个答案: