Application serveur client

package pack9;
import java.io.*;
import java.net.*;
 
public class Client {
     
 
 
public static void main(String[] args) throws Exception {
     final int port = 8080;
    InetAddress localhost=InetAddress.getLocalHost();
    Socket socket = new Socket(localhost, port);
System.out.println("SOCKET = " + socket);
     
 
BufferedReader plec = new BufferedReader( new InputStreamReader(socket.getInputStream()));
 
 
PrintWriter pred = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())),true);
 
 
 
String str = ("bonjour");
 
for (int i = 0; i < 10; i++) {
    // envoi d'un message
    pred.println(str);
     
    // lecture
    String fromServer = plec.readLine();
 
System.out.println(fromServer);
}
System.out.println("END");
 
// message de terminaison
pred.println("END") ;
plec.close();
pred.close();
socket.close();
 
}
}

package pack9;
import java.io.*;
import java.net.*;

public class Serveur {

 static final int port=8080;
 
 public static void main(String[] args) throws Exception{
  // TODO Auto-generated method stub
    
ServerSocket s= new ServerSocket (port);
Socket client=s.accept();


BufferedReader plec= new BufferedReader(new InputStreamReader(client.getInputStream()));

PrintWriter pred=new PrintWriter(new BufferedWriter(new OutputStreamWriter(client.getOutputStream())),true);
 
while (true) {
 // lecture du message
String str = plec.readLine(); 

if (str.equals("END")) {
System.out.println("END");
break;
}
//écriture de message
pred.println(str);
}
client.close();
plec.close();
pred.close();

}
 }

Exception in thread "main" java.net.BindException: Address already in use: NET_Bind
 at java.base/java.net.DualStackPlainSocketImpl.bind0(Native Method)
 at java.base/java.net.DualStackPlainSocketImpl.socketBind(Unknown Source)
 at java.base/java.net.AbstractPlainSocketImpl.bind(Unknown Source)
 at java.base/java.net.PlainSocketImpl.bind(Unknown Source)
 at java.base/java.net.ServerSocket.bind(Unknown Source)
 at java.base/java.net.ServerSocket.<init>(Unknown Source)
 at java.base/java.net.ServerSocket.<init>(Unknown Source)
 at pack9.Serveur.main(Serveur.java:12)