Membuat Program SimpleServer Dan SimpleClienr

Listing Program

• simpleServer

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

simpleClient.java

import java.io.*;

import java.net.*;

public class simpleClient {

public final static int REMOTE_PORT = 5000;

public final static String TARGET = "192.168.43.19";

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;

try {

cl = new Socket(TARGET, 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);

}

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);

}

try {

output = is.readLine();

System.out.println("Dari server: " + output);

} catch (IOException e) {

e.printStackTrace();

}

try {

is.close();

os.close();

cl.close();

} catch (IOException x) {

System.out.println("Error writing...." + x);

}

}

}

Output Program

Berikut adalah tampilan output dari simpleServer.java dan simpleClient.java .

Ketika user salah dalam memasukkan kata kunci, maka akan tampil output seperti di bawah.

Ketika user benar dalam memasukkan kata kunci maka akan tampil output seperti di bawah.