listing program server :
import java.io.*;
import java.net.*;
public class simpleServer {
public final static int TESTPORT = 5000;
public static void main(String args[]) {
ServerSocket checkServer = null;
String line;
BufferedReader is = null;
DataOutputStream os = null;
Socket clientSocket = null;
try {
checkServer = new ServerSocket(TESTPORT);
System.out.println("Aplikasi Server
hidup ...");
} catch (IOException e) {
System.out.println(e);
}
try {
clientSocket = checkServer.accept();
is = new BufferedReader(new
InputStreamReader(clientSocket.getInputStream()));
os = new
DataOutputStream(clientSocket.getOutputStream());
} catch (Exception ei) {
ei.printStackTrace();
}
try {
line = is.readLine();
System.out.println("Terima : " +
line);
if (line.compareTo("salam") == 0) {
os.writeBytes("salam juga");
} else {
os.writeBytes("Maaf, saya tidak
mengerti");
}
} catch (IOException e) {
System.out.println(e);
}
try {
os.close();
is.close();
clientSocket.close();
} catch (IOException ic) {
ic.printStackTrace();
}
}
}
simpleClient.java:
import java.io.*;
import java.net.*;
public class simpleClient {
public final static int REMOTE_PORT = 5000;
public static void main(String args[]) throws
Exception {
Socket cl = null;
BufferedReader is = null;
DataOutputStream os = null;
BufferedReader stdin = new BufferedReader(new
InputStreamReader(System.in));
String userInput = null;
String output = null;
// Membuka koneksi ke server pada port
REMOTE_PORT
try {
cl = new Socket(args[0], REMOTE_PORT);
is = new BufferedReader(new
InputStreamReader(cl.getInputStream()));
os = new
DataOutputStream(cl.getOutputStream());
} catch(UnknownHostException e1) {
System.out.println("Unknown Host: "
+ e1);
} catch (IOException e2) {
System.out.println("Erorr io: " +
e2);
}
// Menulis ke server
try {
System.out.print("Masukkan kata kunci:
");
userInput = stdin.readLine();
os.writeBytes(userInput + "\n");
} catch (IOException ex) {
System.out.println("Error writing to
server..." + ex);
}
// Menerima tanggapan dari server
try {
output = is.readLine();
System.out.println("Dari server: "
+ output);
} catch (IOException e) {
e.printStackTrace();
}
// close input stream, output stream dan
koneksi
try {
is.close();
os.close();
cl.close();
} catch (IOException x) {
System.out.println("Error
writing...." + x);
}
}
}
Penjelasan coding
Program SERVER :
ServerSocket checkServer = null;
String line;
BufferedReader is = null;
DataOutputStream os = null;
Socket clientSocket = null;
pada coding diatas merupkan seuatu metod dalam java jaringan.
try {
checkServer = new ServerSocket(TESTPORT);
System.out.println("Aplikasi Server hidup ...");
} catch (IOException e) {
System.out.println(e);
}
pada coding diatas digunakan untuk menentukan port yang akan dikoneksi dengan client.
try {
clientSocket = checkServer.accept();
is = new BufferedReader(new
InputStreamReader(clientSocket.getInputStream()));
os = new DataOutputStream(clientSocket.getOutputStream());
} catch (Exception ei) {
ei.printStackTrace();
}
Pada coding diatas digunakan untuk menentukan soket yang akan dikonkesi ke dalam client.
try {
line = is.readLine();
System.out.println("Terima : " + line);
if (line.compareTo("salam") == 0) {
os.writeBytes("salam juga");
} else {
os.writeBytes("Maaf, saya tidak mengerti");
}
} catch (IOException e) {
System.out.println(e);
}
coding diatas digunakan untuk menbaca client.
try {
os.close();
is.close();
clientSocket.close();
} catch (IOException ic) {
ic.printStackTrace();
}
}
coding diatas digunakan untuk menutup program server
Program CLIENT :
Socket cl = null;
BufferedReader is = null;
DataOutputStream os = null;
BufferedReader stdin = new BufferedReader(new
InputStreamReader(System.in));
String userInput = null;
String output = null;
coding diatas merupakan method dalam java jaringan client server.
try {
cl = new Socket(args[0], REMOTE_PORT);
is = new BufferedReader(new
InputStreamReader(cl.getInputStream()));
os = new DataOutputStream(cl.getOutputStream());
} catch(UnknownHostException e1) {
System.out.println("Unknown Host: " + e1);
} catch (IOException e2) {
System.out.println("Erorr io: " + e2);
}
coding diatas digunakan untuk menremot client ke server.
try {
output = is.readLine();
System.out.println("Dari server: " + output);
} catch (IOException e) {
e.printStackTrace();
}
codign diatas untuk membaca dan menulis perintah ke server.
try {
is.close();
os.close();
cl.close();
} catch (IOException x) {
System.out.println("Error writing...." + x);
}
}
}
coding diatas digunakan untuk menutup program aplikasi tersebut.
