Its a very long time that i had my hands on Swing.

First thing was to choose an IDE that will make the job more easier and this time i wanted to try

different IDE(i use Eclipse at work and at home too…), so i ended up with NetBeans.

NetBeans for Java desktop applications is like VisualBasic to Windows applications.

Everything was fine until i wanted to add an image to the title bar of a window(JFrame) .

Since this is a desktop java application, i thought to have the images folder inside the jar file.

Issues i faced

i created a folder with name images and put some images inside it.

Since Netbeans gives an ant build file to build and create a jar file , i had to edit the build.xml file to add the image folder inside myapp.jar file.

i tried my best to do it , but i couldn.

Solution

after creating the image folder , right-click on the project , select properties, click Add Folder and select the images folder.

Now Netbeans rewrites the build.xml file to add the images from the image folder to the jar.

so i edited the build.xml file ,so that the images are under a folder inside the jar.

before editing the build.xml the task was

<target name="-do-compile" depends="init,deps-jar,-pre-pre-compile,-pre-compile" if="have.sources">
<j2seproject3:javac/>

<copy todir="${build.classes.dir}">

<fileset dir="${src.images.dir}" excludes="${build.classes.excludes}"/>

<fileset dir="${src.dir}" excludes="${build.classes.excludes}"/>

</copy>
</target>

after editing the build.xml

<target name="-do-compile" depends="init,deps-jar,-pre-pre-compile,-pre-compile" if="have.sources">
<j2seproject3:javac/>
<copy todir="${build.classes.dir}">
<fileset dir="${src.dir}" excludes="${build.classes.excludes}"/>
</copy>
<copy todir="${build.classes.dir}/images">
<fileset dir="${src.images.dir}" excludes="${build.classes.excludes}"/>
</copy>
</target>

to load the image file to the title bar of the JFrame

public Image getIconImage() {
ClassLoader cldr = this.getClass().getClassLoader();
java.net.URL imageURL = cldr.getResource("images/login.gif");
return new ImageIcon(imageURL).getImage();
}

setIconImage(getIconImage());

So thats the solution i found to refer to an image file inside images folder packed inside a jar file.

The webserver is Resin.lets try.

steps:
Prerequisite: JDK 5.0 or later version.(i didn try with 1.4 , so i am not sure.)
1.Download Resin from Caucho .( ofcourse )

2.Unzip the .tar.gz file.( yes, for linux download the .tar.gz file)

3.Open a command prompt and navigate into the resin folder .

4.In the command prompt type ./configure

if u get an error “checking for C compiler default output file name… configure: error: C compiler cannot create executables” .

the solution is

for Ubuntu/Kubuntu on 32 bit processor : instal glibc-devel.

for Ubuntu/Kubuntu on 64 bit processor : instal libc6-dev-amd64.

5. in the command prompt type make (if your ./configure command was succesful.)

6. in the command prompt type make install.

If everything goes fine till here then the installation of Resin web server is complete.

To start the server , in the command prompt navigate into the bin folder and the type the command ./httpd.sh.

Open your favourite web browser and type http://localhost:8080.You should get the welcome page.

If you get an error that “tools.jar is not in the classpath” , open resin.conf file placed inside conf folder and

replace the tag

<java compiler="internal" compiler-args=""/>;

with

<java compiler='javac'/>

This should solve the problem.

Restart the server and check in the web browser , you should get the welcome page.

Here is my code share

Here is the utility class to read getter setter methods in a bean.

public class RequestUtil {
/**
* This method returns a list of Methods of a bean . Methods with String as
* paramterTypes
*
* @param clazz
* @return
* @throws SecurityException
* @throws NoSuchMethodException
* @throws IntrospectionException
*/
public static Map getWriteMethods(Class clazz) throws SecurityException,
NoSuchMethodException, IntrospectionException {
Map writeMethods = new HashMap();
BeanInfo info = Introspector.getBeanInfo(clazz);
PropertyDescriptor[] pd = info.getPropertyDescriptors();
for (int i = 0; i < pd.length; i++) {
if (pd[i].getWriteMethod() != null) {
Method m = pd[i].getWriteMethod();
writeMethods.put(m.getName().toLowerCase(), clazz.getMethod(m
.getName(), m.getParameterTypes()));
}
}
return writeMethods;
}

public static Object populateBean(Class clazz, Map requestMap)

throws ClassNotFoundExceptio,InstantiationException,

IllegalAccessException,IllegalArgumentException,

InvocationTargetException,SecurityException,NoSuchMethodException,IntrospectionException{

Class c = Class.forName(clazz.getName());

Object obj = c.newInstance();

Set keySet = requestMap.keySet();

Object param = null;

Map methodMap = null; methodMap = RequestUtil.getWriteMethods(c);

for(Iterator iter = keySet.iterator(); iter.hasNext()){

String key = (String)iter.next();

String setXXX = ("set"+key).toLowerCase();

System.out.println(setXXX);


Method m = (Method)methodMap.get(setXXX);

Class[] pt = m.getParameterTypes();

/**
* more conditions to check other primitive types to be added
*/
if (pt[0].equals(int.class) || pt[0].equals(Integer.class)) {
param = Integer.valueOf((String) requestMap.get(key));
} else {
param = requestMap.get(key);
}
m.invoke(obj, new Object[] { param });
}
return obj;
}

public static void main(String[] args) {
try {

/**
* assume this is the request parameter Map from getParameterMap()
*/
Map req = new HashMap();
req.put(“userName”, “rajesh”);
req.put(“passwd”, “pass”);
req.put(“age”, “20″);

SampleBean bean = (SampleBean) populateBean(SampleBean.class, req);
System.out.println(“Password >>>>>>>>>> ” + bean.getPasswd());
System.out.println(“UserName >>>>>>>>>> ” + bean.getUserName());
System.out.println(“Age >>>>>>>>>>>>>>> ” + bean.getAge());

} catch (Exception e) {
e.printStackTrace();

}

}
}

The getWriteMethods(Class clazz) method in RequestUtil class returns a Map that has name of the setter methods of SampleBean.java as key and the Method object of the corresponding method as value.

Class class and the Method class of the Reflection API is used to get the handler of each setter method of the SampleBean.java

The populateBean(Class clazz, Map map) takes Class and Map as the parameters.The map argument should be the Map that can be got from HttpServletRequest#getParameterMap().The clazz parameter is the .class of the bean (in this case SampleBean.class) in which the parameter has to be populated.The populateBean method uses the Reflection API to populate the bean object.

you can download the source files here

Note: The work is still under progress and lot of change in the code is expected.

Media support, especially when it comes to video, has always been a huge weak spot for Java on the desktop. But finally, Sun is going to do something about that. Java Media Components, or JMC, is scheduled to ship with Java 7.

One of the key components of JMC is that it will support embedding native media players inside your desktop applications. How? By taking advantage of new support in Java 7 for mixing heavyweight and lightweight widgets in Swing. The Java developer will be able to provide custom controls and custom skins for the player widgets, so that, from the end user standpoint, the media player will appear to be an integrated part of the application. Using the native player approach has at least two big advantages over a pure Java implementation.

more here and here

Finally JDBC 4.0 helped…

if JDBC 4.0 is used , we need not load the JDBC driver , since the api does this for us , provided the driver is in classpath.

and some more explanation about the new features of JDBC 4.0 is available here

i havent tried this api yet and so i have some queries ,

like ….

what if there are two or more jdbc drives in the classpath , which one will be loaded … and so on

will update more about this api , once i finish my experiments ….

want to know more about JavaEE6 click here

You can download the images from here , recreate him and use it in your website.

pls vist https://duke.dev.java.net/ for more information on reusing the images

Here is a list of such companies

HBO , FedEx, Sabre,The Weather Channel, Home Depot, Delta airlines, Equifax,Cingular…

wondering where i could have got this information… its here

1. Groovy
   Groovy is an object oriented programming language for the Java platform.
   Since it resembles other scripting languages like Python ,Ruby, Perl, it is categgorised under
   scripting languages.
   Refer the JSR 241 for more information.
2. Javascript
   Javascript is a scripting language implementing the ECMAScript standards
3. Jython
   Jython is Python written Java
4. Jelly
   Jelly is a Java based scripting languages to process XML
5. BeanShell
   BeanShell is yet another scripting language written Java
6. JRuby
   JRuby is Ruby written in Java
7. Tcl/Java
   Tcl/Java is a bridge between Tcl and Java , that means
   we can invole Java from Tcl and vice versa
8. Sleep
   Sleep stands for Simple Language for Environment Extensions Purposes.
   …another scripting language written in Java (i dont know how many times i have to write it:))
9. Bean Scripting Framework
   Bean Scripting Framework provides a set of Java classes which provides scripting language support within Java applications

… other scripting languages written in and for Java
Pnuts
JudoScript
and many more to come …