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Pemrograman Jaringan Komputer
Info Server dan Info Client
Program ini digunakan untuk mengetahui info server dan info client suatu komputer.
Berikut adalah listing codenya.
infoServer.java
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 0.1n"+
"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 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();
}
}
InfoClient.java
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("");
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();
}
}
Pertama, running program InfoServer.java, kemudian akan muncul tampilan seperti ini.
Kemudian running program InfoClient.java, kemudian pada tampilan InfoServer akan
muncul tampilan seperti ini.

Setelah client sudah terkoneksi, kembali ke program InfoClient, maka akan muncul
seperti tampilan dibawah ini.
Masukkan perintah seperti ini untuk melihat waktu, dan jaringan yang terdapat di
PC/Laptop anda.

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Info server dan info client

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