我必须为我的大学创建一个简单的聊天，当我尝试在 NetBeans 上运行它时，它会显示：“未找到主要课程”。我不明白，我相信我确实有一个主要课程，所以谁能告诉我问题出在哪里？这是代码：
import java.io.* ;
import java.net.*;
public class server {
private static ServerSocket socketservidor = null;
private static Socket socketcliente = null;
private static final int maxclientes = 4;
private static final clienteThread[] hilos = new clienteThread[maxclientes];
public static void main(String args[]) {
int puerto = 2222;
if (args.length < 1) {
System.out.println("CONEXION REALIZADA CORRECTAMENTE \n"
+ "CHAT INICIADO CORRECTAMENTE \n" + "NUM. PUERTO="
+ puerto);
} else {
puerto = Integer.valueOf(args[0]).intValue();
}
try {
socketservidor = new ServerSocket(puerto);
} catch (IOException e) {
System.out.println(e);
}
while (true) {
try {
socketcliente = socketservidor.accept();
int i = 0;
for (i = 0; i < maxclientes; i++) {
if (hilos[i] == null) {
(hilos[i] = new clienteThread(socketcliente, hilos))
.start();
break;
}
}
if (i == maxclientes) {
PrintStream oc = new PrintStream(
socketcliente.getOutputStream());
oc.println("Servidor ocupado. Vuelve a intentar más tarde");
oc.close();
socketcliente.close();
}
} catch (IOException e) {
System.out.println(e);
}
}
}
}
class clienteThread extends Thread {
private PrintStream salida = null;
private DataInputStream entrada = null;
private int maxclientes;
private final clienteThread[] threads;
private Socket socketcliente = null;
public clienteThread(Socket socketcliente, clienteThread[] threads) {
this.socketcliente = socketcliente;
this.threads = threads;
maxclientes = threads.length;
}
public void run() {
int maxclientes = this.maxclientes;
clienteThread[] threads = this.threads;
try {
entrada = new DataInputStream(socketcliente.getInputStream());
salida = new PrintStream(socketcliente.getOutputStream());
salida.println("Solo nos falta saber tu nombre para empezar:");
String nombre = entrada.readLine().trim();
salida.println("Bienvenido a nuestro chat " + nombre + "\n"
+ "Ya puedes chatear con otros usuarios!" + "\n"
+ " teclea /salir para abandonar chat");
for (int i = 0; i < maxclientes; i++) {
if (threads[i] != null && threads[i] != this) {
threads[i].salida.println("***" + nombre
+ " se ha conectado!!!***");
}
}
while (true) {
String linea = entrada.readLine();
if (linea.startsWith("/salir")) {
break;
}
for (int i = 0; i < maxclientes; i++) {
if (threads[i] != null && threads[i] != this) {
threads[i].salida.println(">>" + nombre + ":" + linea);
}
if (threads[i] != null && threads[i] == this) {
threads[i].salida.println("YO:" + linea);
}
}
}
for (int i = 0; i < maxclientes; i++) {
if (threads[i] != null && threads[i] != this) {
threads[i].salida.println("***" + nombre
+ " se ha desconectado***");
}
}
salida.println("***Te has desconectado del chat***");
for (int i = 0; i < maxclientes; i++) {
if (threads[i] == this) {
threads[i] = null;
}
}
entrada.close();
salida.close();
socketcliente.close();
} catch (IOException e) {
System.out.println(e);
}
}
}