jQuery live
กุมภาพันธ์ 9, 2011
Rebinding function to dynamic content with live !
Change from …
$(document).ready(function(){
$(‘#my-id’).click(function(){ dosomethink(); });
});
to …
$(‘#my-id’).live(‘click’, function() { dosomethink();});
References:
http://stackoverflow.com/questions/506764/rebinding-functions-on-dynamic-content-using-jquery-and-ajax
http://api.jquery.com/live
Java Interface
เมษายน 26, 2010
public class TestReadInterfaces {
B b;
C c;
public TestReadInterfaces() {
A a = new A();
Class [] fs = a.getClass().getInterfaces();
for (int i=0; i<fs.length; i++) {
System.out.println(fs[i].getName());
}
}
public static void main(String[] args) {
new TestReadInterfaces();
}
}
class A implements B, C {
}
interface B {
}
interface C {
}
jQuery
เมษายน 12, 2010
jQuery is a JavaScript Library for improving web user interface by writing less code.
http://jquery.com
jQuery Tutorials for Designers
http://www.webdesignerwall.com/tutorials/jquery-tutorials-for-designers/
jQuery in Wikipedia
http://en.wikipedia.org/wiki/JQuery
jQuery Selectors
http://www.tutorialspoint.com/jquery/jquery-quick-guide.htm
JQuery Documentation & APIs
http://docs.jquery.com/Main_Page
http://api.jquery.com/category/effects/
Special Effects
PreLoader
http://dinolatoga.com/2009/04/26/how-to-create-a-visual-image-preloader-using-jquery/
Lazy Image Loader
http://www.appelsiini.net/projects/lazyload
Unzip by Java
กุมภาพันธ์ 21, 2010
package zip;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
public class UnZip {
static final int BUFFER = 2048;
public UnZip(String input) {
try {
BufferedOutputStream dest = null;
BufferedInputStream is = null;
ZipEntry entry;
java.util.zip.ZipFile zipfile = new java.util.zip.ZipFile(input);
Enumeration e = zipfile.entries();
while(e.hasMoreElements()) {
entry = (ZipEntry) e.nextElement();
System.out.println("Extracting: " +entry);
is = new BufferedInputStream(zipfile.getInputStream(entry));
int count;
byte data[] = new byte[BUFFER];
FileOutputStream fos = new FileOutputStream(entry.getName());
dest = new BufferedOutputStream(fos, BUFFER);
while ((count = is.read(data, 0, BUFFER))
!= -1) {
dest.write(data, 0, count);
}
dest.flush();
dest.close();
is.close();
}
} catch(Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
String input = ".\\output\\compress.zip";
UnZip app = new UnZip(input);
}
}
Reference: http://java.sun.com/developer/technicalArticles/Programming/compression/
Zip by Java
กุมภาพันธ์ 21, 2010
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
public class ZipFile {
static final int BUFFER = 2048;
public ZipFile(String input, String output) {
try {
BufferedInputStream origin = null;
FileOutputStream dest = new FileOutputStream(output);
ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(dest));
//out.setMethod(ZipOutputStream.DEFLATED);
byte data[] = new byte[BUFFER];
// get a list of files from current directory
File f = new File(input);
String files[] = f.list();
for (int i=0; i<files.length; i++) {
System.out.println("Adding: "+files[i]);
FileInputStream fi = new FileInputStream(input+files[i]);
origin = new BufferedInputStream(fi, BUFFER);
ZipEntry entry = new ZipEntry(input+files[i]);
out.putNextEntry(entry);
int count;
while((count = origin.read(data, 0,BUFFER)) != -1) {
out.write(data, 0, count);
}
origin.close();
}
out.close();
}
catch(Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
String input = "C:\\Program Files\\Mozilla Firefox\\";
String output = ".\\output\\compress.zip";
ZipFile app = new ZipFile(input,output);
}
}
Reference: http://java.sun.com/developer/technicalArticles/Programming/compression/
Class diagrams
กุมภาพันธ์ 20, 2010
Double Listeners
กุมภาพันธ์ 20, 2010
This code was implemented for testing we can add two listeners to manage same event.
import java.applet.Applet;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
public class DoubleListener extends Applet {
private static final long serialVersionUID = 2371255015431000864L;
public void init() {
System.out.println("Init");
this.addMouseListener(new MyMouseListener1());
this.addMouseListener(new MyMouseListener2());
}
public DoubleListener() {
super();
setSize(600,900);
setVisible(true);
}
public void paint(Graphics g) {
g.setColor(Color.WHITE);
g.fillRect(0, 0, getWidth(), getHeight());
}
}
class MyMouseListener1 implements MouseListener {
public void mouseClicked(MouseEvent e) {
System.out.println("MyMouseListener1::click()");
}
public void mouseEntered(MouseEvent e) { }
public void mouseExited(MouseEvent e) { }
public void mousePressed(MouseEvent e) { }
public void mouseReleased(MouseEvent e) { }
}
class MyMouseListener2 implements MouseListener {
public void mouseClicked(MouseEvent e) {
System.out.println("MyMouseListener2::click()");
}
public void mouseEntered(MouseEvent e) { }
public void mouseExited(MouseEvent e) { }
public void mousePressed(MouseEvent e) { }
public void mouseReleased(MouseEvent e) { }
}
Events and EventListener
กุมภาพันธ์ 18, 2010
My Simple example with 4 classes for understanding how event and eventListener work together.
------------------------------
package myevents;
import java.util.EventObject;
public class MyEvent extends EventObject {
private static final long serialVersionUID = 5736098458773344230L;
private Object data;
public MyEvent(Object source, Object _data) {
super(source);
data = _data;
}
public Object getData() {
return data;
}
}
-------------------------------
package myevents;
import java.util.EventListener;
public interface MyEventListener extends EventListener {
public void myEventHappend(MyEvent e);
}
------------------------------
package myevents;
public class PracticalInterface implements MyEventListener {
@Override
public void myEventHappend(MyEvent e) {
System.out.println((String) e.getData());
}
}
------------------------------
package myevents;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Vector;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JTextArea;
public class AppProgram extends JFrame {
private Vector listeners = new Vector();
private JTextArea _tar = new JTextArea(22,40);
private JButton _bt1 = new JButton("Yeah");
private JButton _bt2 = new JButton("Yoo");
public AppProgram() {
super("Application");
setLayout(new FlowLayout());
_bt1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
shootEvent("Yeah !!");
}
});
_bt2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
shootEvent("Yoo !?");
}
});
this.add(_tar);
this.add(_bt1);
this.add(_bt2);
}
public void addListener(MyEventListener l) {
listeners.add(l);
}
public void removeListener(MyEventListener l) {
listeners.remove(l);
}
public void shootEvent(String text) {
MyEvent me = new MyEvent(this, text);
if (listeners.size() > 0) {
((MyEventListener)listeners.firstElement()).myEventHappend(me);
}
}
public static void main(String[] args) {
AppProgram app = new AppProgram();
PracticalInterface lis = new PracticalInterface();
app.addListener(lis);
app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
app.setSize(400,600);
app.setVisible(true);
}
}
------------------------------
Hope you like it 
------------------------------
Java: Run instance from Abstract class
กุมภาพันธ์ 4, 2010
public abstract class CallAbstractClass {
public static CallAbstractClass getInstance() {return new HiddenClass();}
public abstract String print();
public static void main(String[] args) {
CallAbstractClass instance = CallAbstractClass.getInstance();
System.out.println(instance.print());
}
}
class HiddenClass extends CallAbstractClass {
public HiddenClass() { }
public String print() { return “Yeah”; }
}
- – - – - – - – - – - – - – - – - – - – - – - – - – - – - – - – - – - – - – - – - – - – - – - -
Concept : Singleton
class Singleton {
private static Singleton instance = null;
private Singleton() { ... }
public static Singleton getInstance() {
if (instance==null){
instance = new Singleotn();
}
return instance;
}
public void otherMethod() { ... }
}
Java: How to use interface
ธันวาคม 15, 2009
interface GunInterface {
public void shot();
}
class Bomber implements GunInterface {
public void shot() {
System.out.println(“Bombbb !?”);
}
}
class Bazuka implements GunInterface {
public void shot() {
System.out.println(“Bazuka”);
}
}
public class RefreshInterface {
public RefreshInterface() {
Bomber bomb = new Bomber();
Bazuka bazu = new Bazuka();
GunInterface gun = bomb;
gun.shot();
gun = bazu;
gun.shot();
((GunInterface) bomb).shot();
((GunInterface) bazu).shot();
}
public static void main(String [] argv) {
new RefreshInterface();
}
}
