Java - Packaging

The firstly build the nice directory, for example:

C:\project

    |- bin

    |- src

        |- com

            |- lucia

                |- Boo.java

Then compile your java file using:
C:\project javac -d bin src\com\lucia\Boo.java

The above command will make a binary class file inside your bin directory plus the package.

C:\project> javac -d bin -sourcepath src src\com\lucia\Main.java

C:\project> java -cp bin com.lucia.Main
See more on: http://www.ibm.com/developerworks/library/j-classpath-windows/

Java - Packaging

Iterating Method In Java

For a given array, to iterate over the whole elements in the array, use:

String[] names = new String[]{"lady gaga","barack obama","larry page"};

for(String s: names){

    System.out.println(s);

}

output:

lady gaga

barack obama

larry page
     

Iterating Method In Java

Swing JRadioButton

To use this component, it's needed to use ButtonGroup:

import java.awt.*:

import javax.swing.*;

public Main{

   public static void main(String[] args){

        JFrame frame = new JFrame("Radio Button");

        JRadioButton rbApel = new JRadioButton("Apel");

        JRadioButton rbNanas = new JRadioButton("Nanas");

        JRadioButton rbJambu = new JRadioButton("Jambu"):

        ButtonGroup group = new ButtonGroup();

        group.add(rbApel);

        group.add(rbNanas);

        group.add(rbJambu);

        frame.add(rbApel);

        frame.add(rbNanas);

        frame.add(rbJambu);

        frame.setSize(400, 300);

        frame.setLocation(200, 100);

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setVisible(true);

   }

}

Swing JRadioButton

Swing JCheckBox

import javax.swing.*;

import java.awt.*;

public Main{

    public static void main(String[] args){

        JFrame frame = new JFrame("CheckBox Application");

        JCheckBox cbJambu = new JCheckBox("Jambu");

        JCheckBox cbNanas = new JCheckBox("Nanas");

        JCheckBox cbApel = new JCheckBox("Apel");

        frame.add(cbJambu);

        frame.add(cbNanas);

        frame.add(cbApel);

        frame.setSize(400, 300);

        frame.setLocation(200, 100);

        frame.setDefaultCloseOPeration(JFrame.EXIT_ON_CLOSE);

        frame.setVisible(true);

    }

}

Swing JCheckBox

Swing JEditorPane

This component can be made to load a text string or other. For file you can use: file:\\d:\\data.txt

import javax.swing.*:

public class Main{

    public static void main(String[] args){

        JFrame frame = new JFrame("JEditorPane Application");

        JEditorPane editPane = new JEditorPane();

        try{

            editPane.setPage("http://google.com");

        }catch(Exception ex){

            ex.printStackTrace();

        }

        frame.add(editPane);

        frame.setSize(400, 300);

        frame.setLocation(200, 100);

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setVisible(true);

   }

}

Swing JEditorPane

Swing JTabbedPane

Here's a code on how to show about JTabbedPane: Layout for tabbed pane is BorderLayout by default.

import javax.swing.*;

public class Main{

    public static void main(String[] args){

        JFrame frame = new JFrame("Tab Pane Application");

        JTabbedPane tabPane = new JTabbedPane();

        tabPane.addTab("General", new JButton("Exit"));

        tabPane.addTab("Configuration");

        tabPane.addTab("Advance");

        frame.add(tabPane);

        frame.setSize(400, 300);

        frame.setLocation(200, 100);

        frame.setDefaultCloseOporation(JFrame.EXIT_ON_CLOSE);

        frame.setVisible(true);

    }

}

Swing JTabbedPane

Swing - Load File To JTextArea

Here's a code on how to load a text file to a JTextArea Component:

import java.io.*;

import javax.swing.*;

public class Main{

    public static void main(String[] args){

        JFrame frame = new JFrame("JTextArea Application");

        JTextArea textArea = new JTextArea();

        String text = "";

        try{

            FileReader fr = new FileReader("D://data.txt");

            BufferedReader reader = new BufferedReader(fr);

            String textLine = "";

            while(textLine!=null){

                textLine = reader.readLine();

                text = text + textLine + "\n";

            }

        }catch(Exception ex){

            ex.printStackTrace();

        }

        textArea.setText(text);

        frame.add(new JScrollPane(textArea));

        frame.setSize(400, 300);

        frame.setLocation(200, 100);

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setVisible(true);

    }

}

Swing - Load File To JTextArea

Swing - Table Model

This is a code on how to use table with model:

import javax.swing.*;

import javax.swing.table.*;

public class Main{

    public static void main(String[] args){

        new Main();

   }

    public Main(){

        frame = new JFrame("Table Model Application");

        table = new JTable(new Model());

        frame.add(new JScrollPane(table));

        frame.setSize(400, 300);

        frame.setLocation(200, 100);

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setVisible(true);

    }

}

class Model extends AbstractTableModel{

    public Model(){

        cells = new String[][]{

            new String[]{"1", "Lady Gaga", "New York"},

            new String[]{"2", "Luna Maya", "Denpasar"},

            new String[]{"3", "Aura Kasih", "Jakarta"},

            new String[]{"4", "Bill Gates", "Redmond"}

        };

    }

    public int getRowCount(){

        return cells.length;

    }

    public int getColumnCount(){

        return cells[0].length;

    }

    public Object getValueAt(int r, int c){

        return cells[r][c];

    }

    public getColumnName(int c){

        String[] column = new String[]{"No", "Name",  "City"};

        return column[c];

    }

    private String[][] cells;

}

          

              

Swing - Table Model

Swing - Simple JTable

A code for using JTable in Swing:

import javax.swing.*;

import java.awt.*;

public class Main{

    public static void main(String[] args){

        new Main();

    }

    public Main(){

        frame = new JFrame("JTable Application");

        String[][] cells = {

            {"1", "Lady Gaga", "New York"},

            {"2", "Aura Kasih", "Jakarta'],

            {"3", "Luna Maya", "Denpasar"}

        };

        String[] column = {"No", "Name", "City"};

        table = new JTable(cells, column);

        frame.add(new JScrollPane(table));

        frame.setSize(400, 300);

        frame.setLocation(200, 100);

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setVisible(true);

    }

    private JFrame frame;

    private JTable table;

}

Swing - Simple JTable

Swing - JTree

Here's a code on how to use JTree:

import javax.swing.*;

import javax.swing.tree.*;

public class Main{

    public static void main(String[] args){

        new Main();

    }

    public Main(){

        frame = new JFrame("JTree Application");

        root = new DefaultMutableTreeNode("World");

        DefaultMutableTreeNode usa = new 

                           DefaultMutableTreeNode("USA");

        root.add(usa);

        DefaultMutableTreeNode id = new   

                           DefaultMutableTreeNode("Indonesia");

        root.add(id);

        DefaultMutableTreeNode ny = new 

                           DefaultMutableTreeNode("New York");

        usa.add(ny);

        DefaultMutableTreeNode ca = new 

                           DefaultMutableTreeNode("California");

        usa.add(ca);

        DefaultMutableTreeNode jkt = new 

                           DefaultMutableTreeNode("Jakarta");

        id.add(jkt);

        DefaultMutableTreeNode dp = new 

                           DefaultMutableTreeNode("Denpasar");

        id.add(dp);

        model = new DefaultTreeModel(root);

        tData = new JTree(model);

        frame.add(new JScrollPane(tData));

        frame.setSize(400, 300);

        frame.setLocation(200, 100);

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setVisible(true);

    }

    private JFrame frame;

    private JTree tData;  

    private DefaultTreeModel model;

    private DefaultMutableTreeNode root;

Swing - JTree

Swing - JList Event

Here's a code on how to use JList with event:

import javax.swing.*;

import java.awt.*;
import javax.swing.event.*;

public class Main{

    public static void main(String[] args){

        new Main();

    }

  

    public Main(){

        frame = new JFrame("JList Application");

        model = new DefaultListModel();

        model.addElement("Jakarta");

        model.addElement("Denpasar");

        model.addElement("Manila");

        model.addElement("Sydney");

        lCities = new JList(lCities);

        lCities.addListSelectionListener(new

                                     ListSelectionListener(){

            public void valueChanged(ListSelectionEvent lse){

                if(lse.getValueIsAdjusting){

                    Object obj = lCities.getSelectedValue();

                    JOptionPane.showMessageDialog(frame,

                                               obj.toString);

            }

        });

        frame.add(new JScrollPane(lCities));

        frame.setSize(400, 300);

        frame.setLocation(200, 100);

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setVisible(true);

    }

   

    private JFrame frame;

    private Jlist lCities;

    private DefaultListModel model;

}

Swing - JList Event

Swing - JList Using Model

Here's a code on how to use JList with model;

import javax.swing.*;

import java.awt.*;

public class Main{

    public static void main(String[] args){

        new Main();

    }

  

    public Main(){

        frame = new JFrame("JList Application");

        model = new DefaultListModel();

        model.addElement("Jakarta");

        model.addElement("Denpasar");

        model.addElement("Manila");

        model.addElement("Sydney");

        lCities = new JList(lCities);

        frame.add(new JScrollPane(lCities));

        frame.setSize(400, 300);

        frame.setLocation(200, 100);

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setVisible(true);

    }

   

    private JFrame frame;

    private Jlist lCities;

    private DefaultListModel model;

}

Swing - JList Using Model

Swing - JComboBox Event

To implement event in JComboBox, use:

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

public class Main{

    public static void main(String[] args){

        new Main();

    }

    public Main(){

        frame = new JFrame("JComboBox Event");

        model = new DefaultComboBoxModel();

        model.addElement("Lady Gaga");

        model.addElement("Aura Kasih");

        model.addElement("Luna Maya");

        cbData = new JComboBox(model);

        cbData.addActionListener(new ActionListener(){

            public void actionPerformed(ActionEvent ae){

                JComboBox cb = (JComboBox) ae.getSource();

                Object obj = cb.getSelectedItem();

                JOptionPane.showMessageDialog(frame,

                         "You selected: "+obj.toString());

            }

        });

        frame.add(cbData);

        frame.setLayout(new FlowLayout(FlowLayout.CENTER));

        frame.setSize(400, 300);

        frame.setLocation(200, 100);

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setVisible(true);

    }

    private JFrame frame;

    private JComboBox cbData;

    private DefaultComboBoxModel model;

}

Swing - JComboBox Event

Swing - JComboBox Model

Constructor in JComboBox can be inputed by array ob object, vector or combo box model.

import javax.swing.*;

import java.awt.*;

public class Main{

   

    public static void main(String[] args){

        new Main();

    }

    public Main(){

        frame = new JFrame("Combo Box Application");

        model = new DefaultComboBoxModel();

        model.addElement("Lady Gaga");

        model.addElement("Luna Maya");

        model.addElement("Aura Kasih");

        cbData = new JComboBox(model);

        frame.add(cbData);

        frame.setLayout(new FlowLayout(FlowLayout.CENTER));

        frame.setSize(400, 300);

        frame.setLocation(200, 100);

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setVisible(true);

    }

    private JFrame frame;

    private JComboBox cbData;

    private DefaultComboBoxModel model;

}

Swing - JComboBox Model

Java Event

This code will show on how to make Java Event:

import javax.swing.JFrame;

import javax.swing.JButton;

import javax.swing.JOptionPane;

import java.awt.FlowLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

public class Main{

    public static void main(String[] args){

         new Main();

    }

    public Main(){

        frame = new JFrame("Event Application");

        bDialog = new JButton("Show Dialog");

        bDialog.addActionListener(new ActionListener(){

            public void actionPerformed(ActionEvent ae){

                JOptionPane.showMessageDialog( frame,

                                         "Holla World");

            }

        });

        frame.add(bDialog);

        frame.setLayout(new FlowLayout(FlowLayout.CENTER));

        frame.setSize(400, 300);    

        frame.setLocation(200, 100); 

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setVisible(true);

    }

    private JFrame frame;

    private JButton bDialog;

}

Java Event

Java Desktop Application

This is the most simple desktop application using Java:

import javax.swing.JFrame;

public class Main{

    public static void main(String[] args){

    

        JFrame frame = new JFrame("A Desktop Application");

        frame.setSize(400, 300);

        frame.setLocation(200, 100);

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setVisible(true);

    }

}
 

Java Desktop Application

Java IO - Rendering Binary File

To render binary file through remote server like http, use:

import java.net.URL;

import java.net.URLConnection;

import java.io.InputStream;

public class Main{

    public static void main(String[] args){

        try{

            URL image = new URL("http://www.google.co.id/images/"

                               +"srpr/nav_logo27.png");

            URLConnection conn = image.openConnection();

            InputStream input = conn.getInputStream();

            int biner = 0;

            while(biner!=-1){

               biner = input.read();

               System.out.print((char)biner);

           }catch(Exception ex){

               ex.printStackTrace();

           }

        }

    }

}

        

Java IO - Rendering Binary File

Java Net - Rendering A Web Page

To render a web page, use:

import java.net.URL;

import java.net.URLConnection;

import java.io.InputStream;

import java.io.BufferedReader;

import java.io.InputStreamReader;

public class Main{

    public static void main(String[] args){

        try{

            URL google = new URL("http://google.com");

            URLConnection conn = google.openConnection();

            InputStream input = conn.getInputStream();

            BufferedReader reader = new BufferedReader(input);

            String text = "";

            while(text!=null){

                text = reader.readLine();

                System.out.println(text);

            }

        }

    }

}

     

Java Net - Rendering A Web Page

Java IO - Reading A Binary File

To read a binary file, use:

import java.io.*;

public class Main{

    public static void main(String[] args){

        try{

            File file = new File("D://lady_gaga.jpg");

            FileInputStream input = new
                                    FileInputStream(file);       

            int biner = 0;

            while(biner!=-1){            // -1 is end of file

                biner = input.read();

                System.out.print(biner);

            }

        }catch(Exception ex){

            ex.printStackTrace();

    }

}

Java IO - Reading A Binary File

Java IO - Reading A Text File

Reading one line from text file:

import java.io.*;

public class Main{

    public static void main(String[] args){

        try{
            File file = new File("D://data.txt");

            FileReader reader = new FileReader(file);
                                //FileNotFoundException

            BufferedReader textReader = new

                                        BufferedReader(reader);
            String text = textReader.readLine(); // IOException

            System.out.println(text);

        }catch(Exception ex){

            ex.printStackTrace();

        }

    }   

}

To Read A whole text, use:

import java.io.*;

public class Main{

    public static void main(String[] args){
        try{
            File file = new File("D://data.txt");
            FileReader reader = new FileReader(file);
            BufferedReader bReader = new BufferedReader(reader);

            String text = "";
            while(text!=null){
                text = bReader.readLine();
                System.out.println(text);
            }
        catch(Exception ex){
            ex.printStackTrace();
        }
    }
}

Java IO - Reading A Text File