freedom to use the
same JavaScript routines on both servers and clients. In addition, the
techniques presented throughout this series will allow you to maintain a
single code base for both Ajax and non-Ajax clients
This
double-coding issue can be avoided by using JavaScript combined with Java
code on the server side, getting full support of scripting languages through the Javax.script API. In addition, the Java SE Development Kit
(JDK) 6 already includes Mozilla's Rhino
JavaScript engine, which means no setup is required.
the toSource() method, which all JavaScript objects
must have.
all data exchange between the Java code and
the executed script should be done through primitive variables, strings, and Java
objects (for example, beans) whose properties and methods can be accessed very easily in the
JavaScript code. Simply said, don't try to access native JavaScript objects in your
Java code. Use Java objects in the JavaScript code instead.
Note
that javax.script.Invocable is an optional interface,
which some script engines may not implement. The javaScript engine that comes with
JDK 6 does support this interface.
you
can significantly reduce the execution time by compiling the scripts, using the
methods provided by another optional interface named javax.script.Compilable, which is supported by the javaScript engine of
JDK 6.
HtmlUnit is a "GUI-Less browser for Java programs". It models HTML documents and provides an API that allows you to invoke pages, fill out forms, click links, etc... just like you do in your "normal" browser.
It has fairly good JavaScript support (which is constantly improving) and is able to work even with quite complex AJAX libraries, simulating either Firefox or Internet Explorer depending on the configuration you want to use.
It is typically used for testing purposes or to retrieve information from web sites.
HtmlUnit is not a generic unit testing framework. It is specifically a way to simulate a browser for testing purposes and is intended to be used within another testing framework such as JUnit or TestNG. Refer to the document "Getting Started with HtmlUnit" for an introduction.
HtmlUnit is used as the underlying "browser" by different Open Source tools like Canoo WebTest, JWebUnit, WebDriver, JSFUnit, Celerity, ...
HtmlUnit was originally written by Mike Bowler of Gargoyle Software and is released under the Apache 2 license. Since then, it has received many contributions from other developers, and would not be where it is today without their assistance.
JSP Tutorial - Javatpoint website provides you a complete JSP tutorial with practical programming examples and easy steps using this beginner's tutorial containing basic to advanced knowledge of Java JSP Technology including Form Data, HTTP Request Header, Response Header, Scripting elements, Directive elements, Custom tags, Cookies Handling and Session Tracking.
JavaScript:
The World's Most Misunderstood Programming Language
This is misleading because JavaScript has more
in common with functional languages like Lisp or Scheme than with C or Java.
It has arrays instead of lists and objects instead of property
lists. Functions are first class. It has closures.
You get lambdas without having to balance all those parens.
Some argue that JavaScript is not truly object oriented because it
does not provide information hiding. That is, objects cannot have
private variables and private methods: All members are public.
But it turns out
that JavaScript
objects can have private variables and private methods. (Click here now
to find out how.) Of course, few understand this because JavaScript is
the world's most misunderstood programming language.
Some argue that JavaScript is not truly object oriented because it does not
provide inheritance. But it turns out that JavaScript
supports not only classical inheritance, but other code reuse patterns as well.
“It’s a JavaScript library written by Java developers who clearly don’t
get JavaScript.”
Unfortunately, unlike the built-in properties supplied by
Object.prototype, custom properties added to
Object.prototype will show up as an object property in any
for-in loop in the page.
Want to become a Web Developer but confused about which Programming Language to learn first? New-Age developers highly suggest Javascript because of its Versatility and Effectiveness to extend functionality and make websites extremely Rich and Scalable. If you are looking for a high growth Web Development Job Role, do checkout the MEAN Stack Developer Career Path by edWisor and get 4 Guaranteed interviews at top tech companies.