Calculadoraclienteservidor

CLIENTE.JAVA
import java.io.*;
import java.net.*;

/**
*
* @author
*/
public class Cliente {
public Cliente(){

}
private static BufferedReader stdIn1=newBufferedReader(new InputStreamReader(System.in));
private static BufferedReader stdIn2=new BufferedReader(new InputStreamReader(System.in));
private static BufferedReader stdIn3=newBufferedReader(new InputStreamReader(System.in));
private static BufferedReader stdIn4=new BufferedReader(new InputStreamReader(System.in));
public static void main(String[] args) throws IOException{String IP="localhost";
int PUERTO=5001;
String opc, num1,num2, res;
String continua="s";

while(continua.equals("s")){
try{Socket socket=new Socket(IP,PUERTO);
DataOutputStream salida=new DataOutputStream(new BufferedOutputStream(socket.getOutputStream()));
DataInputStream entrada=newDataInputStream(new BufferedInputStream(socket.getInputStream()));
System.out.println(entrada.readUTF());
System.out.println(entrada.readUTF());System.out.println(entrada.readUTF());
System.out.println(entrada.readUTF());
System.out.println(entrada.readUTF());
System.out.println(entrada.readUTF());opc=stdIn2.readLine();
salida.writeUTF(opc);
salida.flush();
System.out.println(entrada.readUTF());num1=stdIn3.readLine();
salida.writeUTF(num1);
salida.flush();
System.out.println(entrada.readUTF());
num2=stdIn4.readLine();salida.writeUTF(num2);
salida.flush();
System.out.println("El resultado es: ");
System.out.println(entrada.readUTF());
}catch(Exception...