Develop Reference

Wordpress doesn't accept web.xml mapping? Or Java build classes?

I am a beginner and self learning web development for my personal interest, and I have a general question.
I developed a Dynamic Web application in eclipse which uses index.php (or .html ; I can choose) to make a call to javascript file, the JS file calls a java servlet for some optimization and internal calculations through AJAX call, and returns back data to JS and later to the HTML form on index.php. All the paths and mappings are done on web.xml file, and everything works perfectly! The project involves some external google libraries as well, which I have included in eclipse through Build Path.
Then I installed Wordpress locally through Xampp and copied all these files (including all the java classes and external JARs) keeping the folder structure same. Here, index.php does make the call to javascript file, but for AJAX call to java it shows me network error 404. So I have 2 questions:
Does the Wordpress doesn't accept mapping through web.xml? Should I only use absolute paths? I am avoiding absolute paths since I want flexibility in moving files around and I don't know how it will work online when I upload my project somewhere.
Or is the Wordpress/ Xampp not building/ compiling Java classes and external JARs somehow like it is done in Eclipse? I have no idea how this works! I did copy all the updated class files and stuff to the wordpress folders.
Please let me know how to proceed from here, or any suggestions in things I need to learn! I am keen to use Wordpress since it will save me lot of time in writing all the page codes for my website but the java file is also integral to it since it does lot of backend work. I saw lot of comments online that wordpress and java don't go together since it being a PHP based (I actually learned PHP due to this), but it works in eclipse using these 2 languages, so I am hopeful!! So any guidance will be really appreciated!
Thank you! :D
Anang

Integrating 3rd party API with jhipster based webapp

I am trying to build a simple web app using jHipster. Currently I am trying to build a simple stock entity that will enable a user to input the stock name and the entity should generate a listing of that stock with open, high, low and close data. I am unable to figure out how to integrate the web app with a third party API that supplies the data. I could not find any documentation regarding this issue online. Thank you.

I found this tutorial on implementing API's that might help.
What you need to do is create an HTTP client that can access your API.
I'm not too familiar with jHipster but finding the proper library to import seems like a good first step. Good luck.
Source:
https://zapier.com/learn/apis/chapter-8-implementation/
If you aren't sure which language to choose, a great way to narrow down the selection can be to find an API you want to implement and see if the company provides a client library. A library is code that the API owner publishes that already implements the client side of their API. Sometimes the library will be individually available for download or it will be bundled in an SDK (Software Development Kit). Using a library saves you time because instead of reading the API documentation and forming raw HTTP requests, you can simply copy and paste a few lines of code and already have a working client.

Plugins to add features to java

I'm working on a project that requires to add some features to an existing java application using Netbeans. After searching the net, i founded that I should use "plugins". I didn't hear of plugins before.
I have a java application that I should download it from the net, then lets say I have to add a button, when clicked, calls a function that is written in some class in the application. In other words I want to make a new class that is able to access the classes and functions that are written in this application.
What I understood from searching the net is that:
-In the downloaded project's folder there is a folder named plugins.
-This folder contains zip files that contains classes and other stuff.
-I should make a plugin and add it to this folder in order to add a specific feature to the application.
That's what I know, if there is something wrong in what I said, I'll be thankful to correct to me.
Now, my question is that I want a link or website that can teach me how to create and add a plugin to an existing java application. Thank you :)

That entirely depends on the java application you're talking about. Not every application has a Plugins functionality. And not every Java Application uses the same Plugin API. The best bet is to go to the site of the App you're talking about and see if they offer a documentation about their Plugin API.

Where is the Java Google Gmail Api located?

I know this may seem like a really stupid question, but I'm actually having a lot of trouble finding the Google Gmail API. I've searched all over Google's developer website, but all I get are downloads to the general google-api-client.
Those are the classes that I need, but when I try to import them with the standard google client api, it says the classes are missing.
That is what Google keeps telling me to download, the google-api-services-gmail-v1-rev32-java-1.20.00 but in the libs folder there aren't any unique jars for the gmail api. In fact, all of the libs in this zip file are the same libs in the general api, which I've already used and can't find the classes I need.
I remember when I used the drive api for Google it was a pain to find the actual drive libraries, but I eventually found them. All I'm asking is where can I find the actually, gmail specific, libraries. A link would be helpful! Thanks! :D

Your best bet is to resort to Maven to manage this for you. Even if you don't want to use Maven to manage dependencies directly, you can still use the repository to find your JAR files:
http://mvnrepository.com/artifact/com.google.apis/google-api-services-gmail/v1-rev32-1.20.0
And this is the direct download link, present on the website above:
http://central.maven.org/maven2/com/google/apis/google-api-services-gmail/v1-rev32-1.20.0/google-api-services-gmail-v1-rev32-1.20.0.jar
Here is the link to the client API:
http://mvnrepository.com/artifact/com.google.api-client/google-api-client/1.20.0

Build a JS server inside of Java for Google AppEngine

I just needed to create a little interface for a project. So I decided to take given code and to run it on Google AppEngine. My problem is, that I'm experienced in JavaScript and got some basic knowledge of Java, but I got no clue how a Java webapp has to be structured. I started Eclipse and installed the AppEngine-addon, downloaded Rhino and env.js (which is necessary for the bunch of code I need to run) but then found me in the situation of sitting on this files not knowing where to put them.
It would be great if someone could tell me in which directory to put which files for Rhino (I assume it's "/war/WEB-INF/lib/"), how to add the env.js-file and how to access all these files inside the .java-file which is the index of the app.

I don't know about app engine in particular, but I have had good success using Rhino jsc to compile script files which extend the Servlet API. The end result is a nice WAR file which you can deploy in any servlet container, and perhaps App Engine as well. See here for my relevant blog post about this technique, and here for a sample Eclipse project.

Have you taken a look at this tutorial on running Rhino on GAE?
It's a link from the official "Will it play in App Engine?" thread.

http://www.appenginejs.org/ may be of interest as well.