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Program Server dan Client
Dengan Menggunakan Bahasa
Pemrograman Java
Oleh :
TRI LESTARI
(061130701310)
6CD
JURUSAN TEKNIK KOMPUTER
POLITEKNIK NEGERI SRIWIJAYA
PALEMBANG
2014

PROGRAM SERVER DAN CLIENT DENGAN
MENGGUNAKAN BAHASA PEMROGRAMAN JAVA
Server.java
import java.io.*;
import java.net.*;
import java.util.*;
public class Server{
private final int INFO_PORT=50000;
private String datafromClient;
public infoserver() {
BufferedReader inFromClient;
DataOutputStream outToClient;
Socket serverSocket;
try {
ServerSocket infoserver =
new ServerSocket(INFO_PORT);
System.out.println("Server siap...");
while (true){
serverSocket = infoserver.accept();
System.out.println("Ada client" +
"yang terkoneksi!");
inFromClient =
new BufferedReader(
new InputStreamReader(

serverSocket.getInputStream()));
outToClient =
new DataOutputStream(
serverSocket.getOutputStream());
outToClient.writeBytes("InfoServer versi 0.1n"+
"hanya untuk testing..n"+
"Silahkan berikan perintah TIME|NET|QUITn");
boolean isQUIT = false;
while (!isQUIT) {
datafromClient = inFromClient.readLine();
if (datafromClient.startsWith("TIME")){
outToClient.writeBytes(new
Date().toString() + "n");
} else if (datafromClient.startsWith("NET")){
outToClient.writeBytes(
InetAddress.getByName("localhost").toString()+
"n");
} else if (datafromClient.startsWith("QUIT"))
{
isQUIT = true;
}
}
outToClient.close();
inFromClient.close();
serverSocket.close();
System.out.println("Koneksi client sudah
tertutup..");
}
}
catch (IOException ioe) {

System.out.print("error:" + ioe);
}
catch (Exception e) {
System.out.print("error:" + e);
}
}
public static void main(String[]args) {
new infoserver();
}
}
Setelah di compile, maka hasilnya dapat dilihat seperti dibawah ini:
MultiEchoClient.java
import java.net.*;
import java.io.*;
import java.util.*;
public class MultiEchoClient {
private final int INFO_PORT=50000;
private final String TargetHost = "localhost";
private final String QUIT = "QUIT";

public InfoClient() {
try {
BufferedReader inFromUser =
new BufferedReader(new
InputStreamReader(System.in));
Socket clientSocket = new
Socket(TargetHost, INFO_PORT);
DataOutputStream outToServer =
new DataOutputStream(
clientSocket.getOutputStream());
BufferedReader inFromServer =
new BufferedReader(
new InputStreamReader(
clientSocket.getInputStream()));
System.out.println(inFromServer.readLine());
System.out.println("");
boolean isQuit = false;
while (!isQuit) {
System.out.print("Ketikkan Perintah Anda : ");
String cmd = inFromUser.readLine();
cmd = cmd.toUpperCase();
if (cmd.equals(QUIT)) {
isQuit = true;
}
outToServer.writeBytes(cmd + "n");
String result = inFromServer.readLine();
System.out.println("Dari Server: " + result);
}
outToServer.close();

inFromServer.close();
clientSocket.close();
}
catch (IOException ioe) {
System.out.println("Error:" + ioe);
}
catch (Exception e) {
System.out.println("Error:" + e);
}
}
public static void main(String[]args) {
new InfoClient();
}
}
Setelah di compile, maka hasilnya dapat dilihat seperti dibawah ini:

Ketika Client telah terkoneksi dengan server, maka tampilan akan seperti berikut:
Lalu kembali ke jendela Client untuk memilih perintah. Masukkan perintah
yang anda ingin, seperti ini untuk melihat waktu, dan jaringan yang terdapat di
PC/Laptop anda.

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