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Android : adding library project into your project

Let say you have a list view activity in a separate project and is defined as library and it's main activity is "com.ls.list.MyActivity" t he proper way is to add the activity in the main project manifest file <activity android:name="com.ls.list.MyActivity" /> then create intent as usual Intent intent =new Intent(this, MyActivity.class);     startActivity(intent); another way which does not need the manifest changes  inside the main project's activity just write this simple code     Intent intent = new Intent(android.content.Intent.ACTION_VIEW);     intent.setComponent(new ComponentName("com.ls.list","com.ls.list.MyActivity"));      startActivity(intent);

Android :download android sdk manually

1- make sure that eclipse and sdk are closed 2- download the platform from this link http://qdevarena.blogspot.com/2010/05/download-android-sdk-standalone-for.html  and extract it under sdk\platforms 3-download system image for example  this for android 4.2  jelly-bean API level 17 http://software.intel.com/en-us/articles/intel-eula-x86-android-4-2-jelly-bean-bin extract it under  sdk\system-images\android-17 4- start eclipse and start sdk 

Runing multiple mysql instances on one machine

Suppose you have two mysql instances  c:\mysq1 and c:\mysql2 1- create file c:\mysql1\my.cnf add the following lines [mysqld] datadir = C:/mysql1/data port = 3308     2- create file c:\mysql2\my.cnf add the following lines   [mysqld] datadir = C:/mysql2/data port = 3309    3-now run the first instance    cd c:\mysql1\bin mysqld --defaults-file=c:\mysql1\my.cnf     4-open another command and run the second instance     cd c:\mysql2\bin mysqld --defaults-file=c:\mysql2\my.cnf finsihed ;)

Java Start/Stop System process and also check if it is running or not

This  block of code detects if mysql  database process  is running or not String line; try {             Process proc = Runtime.getRuntime().exec("wmic.exe");             BufferedReader input = new BufferedReader(new InputStreamReader(proc.getInputStream()));             OutputStreamWriter oStream = new OutputStreamWriter(proc.getOutputStream());             oStream .write("process where name='mysqld.exe'");             oStream .flush();             oStream .close();             while ((line = input.readLine()) != null) {           ...

GIF animation for windows 7

i have created a java program that plays animated images and you can also control the speed by pressing < for  slowing down  or by pressing > for speeding up the animation program attached link http://www.4shared.com/zip/IejwaSBd/GIF.html

understanding "synchronized , wait() and notify() "

// An incorrect implementation of a producer and consumer. class Q { int n; synchronized int get() { System.out.println("Got: " + n); return n; } synchronized void put(int n) { this.n = n; System.out.println("Put: " + n); } } class Producer implements Runnable { Q q; Producer(Q q) { this.q = q; new Thread(this, "Producer").start(); } public void run() { int i = 0; while(true) { q.put(i++); } } } class Consumer implements Runnable { Q q; Consumer(Q q) { this.q = q; new Thread(this, "Consumer").start(); } public void run() { while(true) { q.get(); } } } class PC { public static void main(String args[]) { Q q = new Q(); new Producer(q); new Consumer(q); System.out.println("Press Control-C to stop."); } } Although the put( ) and get( ) methods on Q are synchronized, nothing stops the producer from overrunning the consumer, nor will anything stop the consumer from consuming the same queue value twice. Thus, you get the e...

Fast Download with progress indication facility using Java NIO

package test; import java.io.FileOutputStream; import java.io.IOException; import java.net.HttpURLConnection; import java.net.URL; import java.nio.ByteBuffer; import java.nio.channels.Channels; import java.nio.channels.ReadableByteChannel; import java.util.Date; public class DownloadProgressExample {     public static void main( String[] args ) {         new Downloader( "c:/header12.jpg", "http://www.daralshifa.com/images/mainheader/header12.jpg" );     }     private interface RBCWrapperDelegate {          // The RBCWrapperDelegate receives rbcProgressCallback() messages         // from the read loop.  It is passed the progress as a percentage         // if known, or -1.0 to indicate indeterminate progress.         //         //...

When to use "Transient" keyword

/** Transient used to mark a variable not to be serialized So if you are serializing an object and you don't want to serialize a partecular variable value inside it, Then you just make it as transient and it will not be serialized Below example explains this concept */ package javabeat.samples; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.io.Serializable; class NameStore implements Serializable{ private String firstName; private transient String middleName; private String lastName; public NameStore (String fName, String mName, String lName){ this .firstName = fName; this .middleName = mName; this .lastName = lName; } public String toStr...

GIF animation fixing zero delay issue

/*  * My GIF Viewer Version 1.0<br/>  * viewing animated Gif by either making it the default program <br/>  * to view it or by dragging the image into the program's frame.<br/>  * The animation can be controlled either you slow it down by pressing <  <br/>  * or speed it up by pressing >  *  */ package gif; import java.awt.Toolkit; import java.awt.datatransfer.DataFlavor; import java.awt.datatransfer.Transferable; import java.awt.datatransfer.UnsupportedFlavorException; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import java.awt.event.MouseEvent; import java.awt.event.MouseMotionListener; import java.io.File; import java.io.IOException; import java.net.MalformedURLException; import java.net.URL; import java.util.Iterator; import mygifutil.MyGifUtil; import java.util.List; import javax.swing.ImageIcon; import javax.swing.JComponent; import javax.swing.JFrame; import j...