PROGRAM APLIKASI NILAI

1.  buat project baru dengan nama nilai pada wireless toolkit
2. ketik program nilai menggunakan notepad++ atau textpad

import javax.microedition.midlet.MIDlet;
import javax.microedition.lcdui.*;
public class nilai extends MIDlet implements CommandListener{
  private Display display;
  private TextField userName,password;
  public Form form;
  private Command login,cancel;
  private Image img, imge, img2;
  Command cmdExit,cmdBack,cmdHitung;
  Display dis;
  Form frmInput,frmOutput;
  TextField tfMakul,tfNilai;
  StringItem siMakul,siSKS,siNilai,siGrade,siBobot;
  ChoiceGroup cg1;

  public nilai() {
    form = new Form("Sign in");
    userName = new TextField("LoginID:", "", 30, TextField.ANY);
    password = new TextField("Password:", "", 30, TextField.PASSWORD);
    cancel = new Command("Cancel", Command.CANCEL, 2);
    login = new Command("Login", Command.OK, 2);
    try{
      img = Image.createImage("/logo.png");
      imge = Image.createImage("/gagal.png");
      img2 = Image.createImage("/sukses.png");
    }catch(Exception e){
      System.out.println(e.getMessage());
    }
    cmdExit = new Command("Keluar",Command.EXIT,0);
    cmdBack = new Command("OK",Command.SCREEN,0);
    cmdHitung = new Command("Proses",Command.SCREEN,0);
    cg1=new ChoiceGroup("SKS",Choice.EXCLUSIVE);
    cg1.append("2 SKS",null);
    cg1.append("4 SKS",null);
    cg1.append("6 SKS",null);
    frmInput=new Form("Form Input");
    tfMakul = new TextField("Mata Kuliah","",30,TextField.ANY);
    tfNilai = new TextField("Nilai","",30,TextField.NUMERIC);
    frmInput.append(tfMakul);
    frmInput.append(cg1);
    frmInput.append(tfNilai);
    frmInput.addCommand(cmdExit);
    frmInput.addCommand(cmdHitung);
    frmInput.setCommandListener(this);
    frmOutput=new Form("Form Output");
    siMakul=new StringItem("Mata Kuliah","");
    siSKS=new StringItem("SKS","");
    siNilai=new StringItem("Nilai","");
    siGrade=new StringItem("Grade","");
    siBobot=new StringItem("Bobot Nilai",null);
    frmOutput.append(siMakul);
    frmOutput.append(siSKS);
    frmOutput.append(siNilai);
    frmOutput.append(siGrade);
    frmOutput.append(siBobot);
    frmOutput.addCommand(cmdBack);
    frmOutput.setCommandListener(this);
  }
   public void startApp() {
    display = Display.getDisplay(this);
    try{form.append(img);}catch(Exception e){}
    form.append(userName);
    form.append(password);
    form.addCommand(cancel);
    form.addCommand(login);
    form.setCommandListener(this);
    display.setCurrent(form);

  }
  public void pauseApp() {}
  public void destroyApp(boolean unconditional) {
  notifyDestroyed();
    }
    public void validateUser(String name, String password) {
      if (name.equals("kakcik") && password.equals("211")) {
        showMsg();
      } else {
        tryAgain();
      }
    }
    public void showMsg() {
     dis = Display.getDisplay(this);
     dis.setCurrent(frmInput);
    }
    public void tryAgain() {
      Alert error = new Alert("Login salah", "coba lagi", imge, AlertType.ERROR);
      error.setTimeout(900);
      error.setImage(imge);
      userName.setString("");
      password.setString("");
      display.setCurrent(error, form);
    }

    public void commandAction(Command c, Displayable d) {
      String label = c.getLabel();
      if(label.equals("Cancel")) {
        destroyApp(true);
      } else if(label.equals("Login")) {
        validateUser(userName.getString(), password.getString());
      }
      if(c==cmdBack){
      dis.setCurrent(frmInput);
      }else if(c==cmdHitung){
      int nilai,nilaigrade,bobotnilai,sks;
      siMakul.setText(tfMakul.getString());
      if(cg1.isSelected(0)){
      siSKS.setText("2 SKS");
      sks=2;
      }else if(cg1.isSelected(1)){
      siSKS.setText("4 SKS");
      sks=4;
      }else{
      siSKS.setText("6 SKS");
      sks=6;
      }
      siNilai.setText(tfNilai.getString());
      nilai=Integer.parseInt(tfNilai.getString());
      if(nilai<=49){
      siGrade.setText("E");
      nilaigrade=0;
      }else if(nilai<=59){
      siGrade.setText("D");
      nilaigrade=1;
      }else if(nilai<=74){
      siGrade.setText("C");
      nilaigrade=2;
      }else if(nilai<=80){
      siGrade.setText("B");
      nilaigrade=3;
      }else{
      siGrade.setText("A");
      nilaigrade=4;
      }
      bobotnilai=sks*nilaigrade;
      siBobot.setText(Integer.toString(bobotnilai));
      dis.setCurrent(frmOutput);
      }else if(c==cmdExit){
      destroyApp(false);
      notifyDestroyed();
      }else{
      dis.setCurrent(frmInput);
}
    }
}

3. setelah selesai build program tersebut lalu pilih run

4. hasil program
sebelum kita masuk ke program nilai kita harus melakukan login terlebih dahulu dengan login id kakcik dan password 211

APLIKASI CHATTING DENGAN JAVA

1. Siapkan 2 buah komputer atau laptop, kabel cross, atur terlebih dahulu ip address pada kedua komputer.
    disini dimisalkan 192.168.0.1 dan komputer 2 192.168.10.2

2. Ketik Program Berikut pada notepad++ atau textpad
import java.net.*;
import java.io.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

class ChatClient extends JFrame{

JLabel lblPesan =  new JLabel  ("Kirim Pesan :");
TextArea taPesan=new TextArea(4,50);
JLabel lblBalasan = new JLabel ("Dari Teman  :");
TextArea taBalasan=new TextArea(4,50);
JButton btnSend=new JButton("Send");
JButton btnOpen=new JButton("Open Connection");
JButton btnClose=new JButton("Close Connection");
Socket con=null;
ObjectOutputStream toServer;
ObjectInputStream fromServer;
String balasan=null;
String inputIPServer;

public void openConnection(){
           try{
                     //input dialog u/ memasukkan IP Address Chat Server
                     inputIPServer=JOptionPane.showInputDialog("Inputkan IP Server");

                     //koneksi ke port 2000 pada IP Address Server
                     con=new Socket(InetAddress.getByName(inputIPServer),2000);
                     toServer=new ObjectOutputStream(con.getOutputStream());
           }//end try
           catch (EOFException ex){
                       ;
           }
           catch(IOException io){
                       System.out.println("IO Exception");
                       io.printStackTrace();
           }
}//end openConnection();

public void sendData(){
           try{
                       toServer.writeObject(taPesan.getText());
                       taPesan.setText("");
               taPesan.requestFocus();
           }
           catch (EOFException ex){
                       ;
           }
           catch(IOException io){
                       System.out.println("IO Exception");
                       io.printStackTrace();
           }
}//end void sendData()

public void getData(){
           try{
                       fromServer=new ObjectInputStream(con.getInputStream());
                       balasan=(String) fromServer.readObject();
                       //System.out.println(balasan);
                       taBalasan.setText(balasan);
           }
           catch (ClassNotFoundException ex){
                       System.out.println("Error");
           }
           catch (EOFException ex){
                       ;
           }
           catch(IOException io){
                       System.out.println("IO Exception");
                       io.printStackTrace();
           }
}//end void getData()
public void closeConnection(){
           try{
                     toServer.writeObject("bye");
                     con.close();
                     con=null;
           }//end try
           catch (EOFException ex){
                       ;
           }
           catch(IOException io){
                       System.out.println("IO Exception");
                       io.printStackTrace();
           }
}//end closeConnection();

public ChatClient(){
           Container c = getContentPane();
           c.setLayout (new FlowLayout());
           c.add (lblPesan);
           c.add (taPesan);
           c.add (lblBalasan);
           c.add (taBalasan);
           c.add (btnOpen);
           c.add (btnSend);
           c.add (btnClose);

           btnOpen.addActionListener (new ActionListener(){
                       public void actionPerformed(ActionEvent evt){
                                   openConnection();
                       }//end void actionPerformed
           });

           btnSend.addActionListener (new ActionListener(){
                       public void actionPerformed(ActionEvent evt){
                                   sendData();
                                   getData();
                       }//end void actionPerformed
           });

           btnClose.addActionListener (new ActionListener(){
                       public void actionPerformed(ActionEvent evt){
                                   closeConnection();
                       }//end void actionPerformed
           });
  
           //pack();
}//end public ChatClient()

         public static void main(String[] args)
         {
                     ChatClient klien = new ChatClient();
                     klien.setTitle("Chatting - Client");
                     klien.setLocation (300,300);
                     klien.setSize(500,250);
                     klien.setVisible(true);        
                     klien.addWindowListener(new WindowAdapter(){
                                 public void windowClosing(WindowEvent ev){                               
                                             System.exit(0);
                                 }//end void
                     });

         }//main

}//class

3. ketik program client pada notepadd
import java.net.*;
import java.io.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

class ChatServer extends JFrame{

JLabel lblPesan =  new JLabel  ("Kirim Pesan :");
TextArea taPesan=new TextArea(4,50);
JLabel lblBalasan = new JLabel ("Dari Teman  :");
TextArea taTeman=new TextArea(4,50);
JButton btnSend=new JButton("Send");
JButton btnClose=new JButton("Close Connection");
ServerSocket sktServer;
Socket conClient;

ObjectInputStream fromClient;
ObjectOutputStream toClient;
String s=null;
Container c;


public void sendData(){
           try{
                       toClient=new ObjectOutputStream(conClient.getOutputStream());
                       toClient.writeObject(taPesan.getText());
                       System.out.println(taPesan.getText());
                       taPesan.setText("");
               taPesan.requestFocus();

           }
           catch (EOFException ex){
                       ;
           }
           catch(NullPointerException npe){
                     JOptionPane.showMessageDialog(null, "Koneksi Belum Tersambung ! ",
                                 "Pesan", JOptionPane.ERROR_MESSAGE);
           }
           catch(SocketException se){
                     JOptionPane.showMessageDialog(null, "Koneksi Putus !",
                                 "Pesan", JOptionPane.ERROR_MESSAGE);
           }
           catch(IOException io){
                       System.out.println("IO Exception");
                       io.printStackTrace();
           }
}//end void sendData()


public void closeConnection(){
           try{
                     //toClient.writeObject("bye");
                     conClient.close();
                     conClient=null;
                     System.exit(0);
           }//end try
           catch (EOFException ex){
                       ;
           }
           catch(IOException io){
                       System.out.println("IO Exception");
                       io.printStackTrace();
           }
}//end closeConnection();

public ChatServer()throws IOException{
                     c = getContentPane();
                     c.setLayout (new FlowLayout());
                     c.add (lblPesan);
                     c.add (taPesan);
                     c.add (lblBalasan);
                     c.add (taTeman);
                     c.add (btnSend);
                     c.add (btnClose);


           btnSend.addActionListener (new ActionListener(){
                       public void actionPerformed(ActionEvent evt){
                                   sendData();
                       }//end void actionPerformed
           });

           btnClose.addActionListener (new ActionListener(){
                       public void actionPerformed(ActionEvent evt){
                                   closeConnection();
                       }//end void actionPerformed
           });

}//end public ChatServer()

         public void terimaKoneksi() throws IOException{
             //sktServer=new ServerSocket(2000,1000);
                     sktServer=new ServerSocket(2000);
                     conClient=sktServer.accept();
                     //tunggu sampai client masuk melalui port 2000

                     //System.out.println("Tersambung dengan client " +
                                 //conClient.getInetAddress());

                     JOptionPane.showMessageDialog(null, "Tersambung dengan Client " +
                                 conClient.getInetAddress().toString(), "Pesan",
                                 JOptionPane.INFORMATION_MESSAGE);
                     sktServer.close();

                     try{

                                 fromClient=new ObjectInputStream(conClient.getInputStream());
                                 do{
                                             try{
                                                         s=(String) fromClient.readObject();
                                                         //System.out.println(s);
                                                         taTeman.setText(s);
                                             }//end try
                                             catch(ClassNotFoundException ex){
                                                         System.out.println("Error");
                                             }//end catch
                                 }//end do
                                 while (!s.equals("bye"));
                     }//end try
                     catch (EOFException ex){
                                 ;
                     }
                     catch (IOException io) {
                                 System.out.println("IO Exception");
                                 io.printStackTrace();
                     }
                     finally {
                                 System.out.println("Closed");
                                 conClient.close();
                     }//end finally
         }//end void terimaKoneksi()

         public static void main(String[] args) throws IOException
         {
                     ChatServer svr = new ChatServer();
                     svr.setTitle("Chatting - Server");
                     svr.setLocation (300,300);
                     svr.setSize(500,250);
                     svr.setVisible(true);
                     svr.addWindowListener(new WindowAdapter(){
                                 public void windowClosing(WindowEvent ev){
                                             System.exit(0);
                                 }//end void
                     });
                     //supaya GUI muncul dulu & bisa terima koneksi, maka
                     //method terimaKoneksi() diletakkan di sini
                     svr.terimaKoneksi();

         }//end main
}//end class

4. jalankan program tersebut pada command prompt

hasil program

 

1. Mengambil IP Komputer Lokal 
    Nama Program getIP.java
   

















hasil program adalah


2. Mengetahui Nama Komputer dari Alamat IP
Nama Program getName.java

hasil program


   





3. mengetahui nama komputer dari alamat ip menggunakan inputan-user
   Nama program IPtoName.java


hasil program






4. mengetahui alamat IP dari nama Komputer
    Nama program NsLookup.java

hasil program adalah

Routing adalah mekanisme dimana sebuah mesin bisa menemukan untuk kemudian berhubungan dengan mesin lain. diperlukan sebuah proses routing, atau secara mudah router dapat dikatakan, menghubungkan dua buah jaringan yang berbeda tepatnya mengarahkan rute yang terbaik untuk mencapai network id yang berbeda. router sering dipakai untuk menghubungkan jaringan antar lembaga atau perusahaan yang masing - masing telah memiliki jaringan dengan network id yang berbeda. maka router akan berfungsi mengalirkan paket data dari perusahaan tersebut kelembaga laein melalui internet, sudah tentu nomor jaringan perusahaan tersebut akan berbeda.

routing dinamik adalah cara yang digunakan untuk melepaskan kewajiban mengisi entri-entri forwading table secara manual. protokol routing berfungsi mengatr router-router sehingga dapat berkomunikasi satu dengan yang lain dan saling memberikan informasi routing yang dapat mengubah isi forwarding table, tergantung keadaan jaringannya.

untuk melihat penjelasan tentang konfigurasinya silahkan download disini
untuk simulasinya download disini