Percobaan membuat aplikasi Client dan Server.
Copy Source Code berikut ke program Java :
Source Code untuk Server :
package
server;
import
java.io.IOException;
import
java.io.ObjectInputStream;
import
java.io.ObjectOutputStream;
import
java.net.ServerSocket;
import
java.net.Socket;
import
java.util.logging.Level;
import
java.util.logging.Logger;
public
class Tugas_Server {
public static void main(String[] args) {
try {
ServerSocket ss = new
ServerSocket(5111);
Socket s;
String balasan;
String balasan2;
ObjectInputStream in = null;
ObjectOutputStream out = null;
s = ss.accept();
out = new
ObjectOutputStream(s.getOutputStream());
out.flush();
in = new
ObjectInputStream(s.getInputStream());
balasan = "";
balasan2 = "";
while (true) {
balasan = "";
balasan2 = "";
balasan = ReadMessage(in);
if
(balasan.equals("exit")) break;
else {
if(balasan.equals("ini
client"))
{
SendMessage("ini
server, masukan username", out);
balasan2 = ReadMessage(in);
if
(balasan2.equals("admin")){ SendMessage("Selamat Datang
Admin", out);}
else {
if
(balasan2.equals("user")){SendMessage("Selamat Datang
User", out);}
else
SendMessage("username tidak diketahui", out);
}
}
else
{
SendMessage("perintah tidak diketahui", out);
}
}
}
in.close();
out.close();
s.close();
ss.close();
}catch
(IOException ex){
Logger.getLogger(Tugas_Server.class.getName()).log(Level.SEVERE,null,ex);
}
}
public static String
ReadMessage(ObjectInputStream in)
{
String Reader="";
try {
Reader=(String)in.readObject();
}catch (IOException ex){
Logger.getLogger(Tugas_Server.class.getName()).log(Level.SEVERE,null,ex);
}catch (ClassNotFoundException ex){
Logger.getLogger(Tugas_Server.class.getName()).log(Level.SEVERE,null,ex);
}
System.out.println(Reader);
return Reader;
}
public static void SendMessage(String word,
ObjectOutputStream out)
{
try{
out.writeObject(word);
out.flush();
}catch (IOException ex){
Logger.getLogger(Tugas_Server.class.getName()).log(Level.SEVERE,null,ex);
}
}
}
-------------------------------------------------------------------------------------------------------------------------
Source Code untuk Client :
package
tugas_client;
import
java.util.Scanner;
import
java.io.IOException;
import
java.io.ObjectInputStream;
import
java.io.ObjectOutputStream;
import
java.net.Socket;
import
java.util.logging.Level;
import
java.util.logging.Logger;
public
class Tugas_Client {
public static void main(String[] args)
throws IOException{
Socket s=new
Socket("10.0.0.4", 5111);
ObjectInputStream in=null;
ObjectOutputStream out=null;
Scanner scanf=new Scanner(System.in);
String input="";
String balasan;
String balasan2;
out=new
ObjectOutputStream(s.getOutputStream());
out.flush();
in=new
ObjectInputStream(s.getInputStream());
balasan = "";
balasan2="";
while(true)
{
balasan="";
balasan2="";
input=scanf.nextLine();
SendMessage(input, out);
if(input.equals("exit"))break;
else
{
balasan=ReadMessage(in);
if(balasan.equals("ini
server, masukkan username"))
{
input=scanf.nextLine();
SendMessage(input, out);
balasan2=ReadMessage(in);
}
}
}
in.close();
out.close();
s.close();
}
public
static void SendMessage(String word, ObjectOutputStream out)
{
try{
out.writeObject(word);
out.flush();
} catch (IOException ex){
Logger.getLogger(Tugas_Client.class.getName()).log(Level.SEVERE, null,
ex);
}
}
public
static String ReadMessage(ObjectInputStream in)
{
String reader="";
try{
reader=(String) in.readObject();
} catch (IOException ex){
Logger.getLogger(Tugas_Client.class.getName()).log(Level.SEVERE, null,
ex);
} catch (ClassNotFoundException ex){
Logger.getLogger(Tugas_Client.class.getName()).log(Level.SEVERE, null,
ex);
}
System.out.println(reader);
return reader;
}
}
------------------------------------------------------------------------------------------------------------------------
Setelah selesai Jalankan (Run) sistem server terlebih dahulu, kemudian jalankan (run) sistem clien.
Contoh Hasil Outputnya :
 |
| Tampilan Client |
 |
| Tampilan Server |