Info Server dan Client

Pada materi kali ini kita akan mempraktekkan program server dan client. Pada program ini program server dan client harus di jalankan dan akan ada tampilan pada program client. Jika pada program server sudah dijalankan, maka hasil dari program akan mencul.

Program Sever :
import java.io.*;
import java.net.*;
import java.util.*;

public class InfoServer {
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 telah 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 0.1\n"+
"hanya untuk testing..\n"+
"Silahkan berikan perintah TIME|NET|QUIT\n");

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 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();
}
}

Hasil dari program server adalah :

Program Info Client :

import java.net.*;
import java.io.*;
import java.util.*;

public class InfoClient {
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(inFromServer.readLine());
System.out.println(inFromServer.readLine());
System.out.println("");
boolean isQuit = false;
while (!isQuit) {

System.out.print("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();
}
}

Maka jalankan Client dan akan muncul tampilan seprti gambar di bawah ini.

                             

 Agar lebih memudah untuk memahami silahkan praktekkan program di bawah ini.

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