Remove Whitespace From HTML / JSP / JSF explains about implementing a servlet filter for removing whitespace & blank lines from your html/jsp/jsf output, which will reduce the payload and improve the overall web application performance

If you need a solution for below questions

How To Remove Whitespace From Response In Your Java Web Application?
How To Remove Whitespace From JSP/JSF And HTML?

then servlet filter will be the right choice, because by using servlet filter, we can implement this in a single place rather than on implementing every page

if you dont know about Servlet Filter, you can follow servlet filter Tutorial Here I am using, whitespace removing filter available from http://balusc.blogspot.in/2007/12/whitespacefilter.html

By using this filter you can strip/trim whitespace & newline characters from your html/jsp/jsf pages without losing actual contents

Create Line Chart Using JFreeChart explains about creating a simple line chart using JFreeChart API

A line chart or line graph is a type of chart which displays information as a series of data points connected by straight line segments.[1] It is a basic type of chart common in many fields. It is similar to a scatter plot except that the measurement points are ordered (typically by their x-axis value) and joined with straight line segments

Reference -> http://en.wikipedia.org/wiki/Line_chart

How To Create Line Chart Using JFreeChart library?

Create Bar Chart Using JFreeChart explains about creating a simple bar chart using JFreechart API

A bar chart or bar graph is a chart with rectangular bars with lengths proportional to the values that they represent. The bars can be plotted vertically or horizontally. A vertical bar chart is sometimes called a column bar chart

Reference -> http://en.wikipedia.org/wiki/Bar_chart

How To Create Bart Chart Using JFreeChart library?

Java GZIP Compression Filter Example explains about implementing a GZIP compression filter for optimizing web application performance

How To Compress HTML Content Using Gzip Servlet Filter?

GZIP is compression algorithm used for compression text files such as HTML, JavaScript, CSS etc, Which will reduce the data (bandwidth) sent to browser

Here we are discussing about implementing Gzip Compression Filter using Java Servlet Filter, if you don't know about Servlet Filter, you can follow servlet filter Tutorial

By implementing GZIP compression, will dramatically improve web application performance and reduce download time.

For availing GZIP compression, your browser must support GZIP compression, you need to set Accept-Encoding request header

JSTL forTokens Example explains about how to use JSTL forTokens inside JSP and its various mandatory and optional attributes.

c:forTokens Tag is used for splitting a string into tokens and iterate through each of the tokens, c:forTokens Tag is available as a part of JSTL core tags

Inside c:forTokens Tag, you need to specify following mandatory attributes.

items -> These values (token strings) are used to iterate with delimiters.

delims -> These values are that split / separate the token string

Inside c:forTokens Tag, you need to specify following optional attributes.

begin -> Starting element from

end -> Ending element 

step -> Iterating steps

var -> Current item

varStatus -> Name of the variable inside loop

You can see the below example demonstrating the usage JSTL c:forTokens Tag Example inside JSTL

JSTL Redirect Tag Example explains about how to use jstl redirect tag in order to redirect the request to another url

Consider an example, where you need to redirected a page, according to some condition, in that case you can use JSTL c:redirect Tag

Inside c:redirect Tag, you can specify following attributes.

url -> This attribute specify the resource need to be redirected.

context -> This attribute specify the context name when redirecting whether it is relative or absolute

You can see the below example demonstrating the usage JSTL c:redirect Tag Example inside JSP

SoapUI Tutorial For Testing Web Service ( REST & SOAP) explains about testing a web service (SOAP based & REST based) using soapUI testing tool

soapUI is a testing tool used for different types of tests, such as functional testing, regression testing, compliance testing, and load testing

soapUI is a cross platform tool, Here we are using soapUI for testing various webservices, By using soapUI you can test both REST and SOAP services

On this Simple GSON Example explains about converting a Java Object to JSON string nad JSON string to Java Object Using Google Gson JSON library

Google Gson is a Java library that can be used to convert Java Objects into their JSON representation. It can also be used to convert a JSON string to an equivalent Java object. Gson can work with arbitrary Java objects including pre-existing objects that you do not have source-code of.

Reference -> code.google.com/p/google-gson/

Here I am showing an example about How to convert a Java Object into JSON string and vice versa using Google Gson.