socket 菜鸟求指教~ 找不到主函数？

[into_wild]

写一个C/S的socket app,实现通信和一些自定义的基本命令， 以下代码可以正常编译，但是无论是server还是client，命令行下一运行就出错，显示

package ClientServer;
//client
import java.io.*;
import java.net.*;

public class myClient {

	public static void main(String[] args) throws IOException {
		String servername = args[0];
		int port = Integer.parseInt(args[1]);
		
		Socket clientsocket = null;
		PrintStream out = null;
		BufferedReader in = null;
		boolean connected = false;
		boolean isEcho = false;
		
		try {
			clientsocket = new Socket(servername, port);			
			connected = true;
			out = new PrintStream(clientsocket.getOutputStream());
			in = new BufferedReader(new InputStreamReader(clientsocket.getInputStream()));
		}catch (IOException e) {
			System.err.println("Error:Cannot connect to server!");
			System.exit(1);
		} 
		
		BufferedReader stdIn = new BufferedReader (new InputStreamReader(System.in));
		String userInput;
		
		//out.print("client");
		while (connected) {
			System.out.println("Session has been established.");
			System.out.print("operation>");
			userInput = stdIn.readLine(); 
			if (userInput == "whoAMi") {
				out.println(userInput);
				System.out.println(in.readLine());
			} else if (userInput == "bye") {
				out.println(userInput);
				System.out.println(in.readLine());
				connected = false;
			} else if (userInput == "startEcho") {
				isEcho = true;
				out.println(userInput);
				System.out.println(in.readLine());
				
				String echoInput;
				while (isEcho) {
					System.out.print("echo>");
					echoInput = stdIn.readLine();
					if (echoInput == "stopEcho") {
						isEcho = false;
					}
					out.println(echoInput);
					System.out.println(in.readLine());
				}
			}	
		}
		System.out.println("Session is terminated.");
		
		out.close();
		in.close();
		stdIn.close();
		clientsocket.close();
	}

}



package ClientServer;
//server
import java.io.*;
import java.net.*;

public class myServer{
	ServerSocket serversocket;
	String inputLine, outputLine;
	String message;

	public myServer(int portNum){}
		
	void run()
	{
		try{
			FileWriter fstream = new FileWriter("Log.txt", true);
			PrintWriter log = new PrintWriter(fstream);
			
			System.out.println("Waiting for client on port " + serversocket.getLocalPort());
			Socket clientsocket = serversocket.accept();
			System.out.println("Connected to client on " + clientsocket.getRemoteSocketAddress());
			log.println("\r\n************SocketLog**************");
			log.println("Connected to client on " + clientsocket.getRemoteSocketAddress());
			
			PrintStream out = new PrintStream(clientsocket.getOutputStream());
			BufferedReader in = new BufferedReader(new InputStreamReader(clientsocket.getInputStream()));
			
			while ((inputLine = in.readLine()) != null) {
				
				if (inputLine == "whoAMi") {
					//outputLine = "server: " + serversocket.getLocalSocketAddress();
					outputLine = "server: " + java.net.InetAddress.getLocalHost().getHostAddress();
					out.println(outputLine);
					log.println("\nOperation from client " + clientsocket.getRemoteSocketAddress() +": "+ inputLine);
				} else if (inputLine == "startEcho") {
					outputLine = "listening";
					out.println(outputLine);
					log.println("\nOperation from client " + clientsocket.getRemoteSocketAddress() +": "+ inputLine);
					log.println("\nNow in Echo mode.\n");
					
					while ((message = in.readLine()) != null) {
						if (message == "stopEcho") {
							log.println("Operation from client " + clientsocket.getRemoteSocketAddress() +": "+ message);
							log.println("Now out of Echo mode.");
							break;
						}
						outputLine = "server: " + message;
						out.println(outputLine);
						log.println("Echo from client " + clientsocket.getRemoteSocketAddress() +": "+ message);
					}
					out.println("stopped");
				} else if (inputLine == "bye") {
					System.out.println("Connection to client " + clientsocket.getRemoteSocketAddress() + " terminated.");
					log.println("Connection to client " + clientsocket.getRemoteSocketAddress() + " terminated.");
					out.println("bye");
					break;
				}
			}
			out.close();
			in.close();
			clientsocket.close();
			log.close();
			fstream.close();
				
		} catch (IOException e) {
			System.exit(1);
		}
	}
	
	public static void main(String[] args)
	{
		int portNum = Integer.parseInt(args[0]);
		myServer server = new myServer(portNum);
		while(true){
			server.run();
		}
	}
}

不知道是什么错误？找不到主函数？新手求详细指导~~谢各位大神啊~~

[into_wild]

补充一下，不需要多线程，只要实现一对一的通信即可

[nmyangym]

尝试一下: 1 把当前目录退到向上一级,cd .. 2 运行 java ClientServer.myServer

[咖啡机]

如果是用命令的话，我担心你没有编译myServer类， 再者，请把类名开头第一字母大写（编码规范）。

[a8509190]

你的类可能没有编译。。

[dscccc]

相当不错，帮助很大

[tianfang]

分别导出Jar文件，服务端需要一直运行，使用下面命令运行 java -jar server 100 （100为端口号）