Home Jsp Simple-jsp-example EL Basic Comparisons

Related Tutorials


 
 

Share on Google+Share on Google+

EL Basic Comparisons

Advertisement
EL means the expression language , it makes it possible to easily access application data stored in JavaBeans components.

EL Basic Comparisons

        

EL means the expression language , it makes it possible to easily access application data stored in JavaBeans components. The jsp expression language allows a page author to access a bean using simple syntax such as $(name).  Before JSP 2.0, we could  use only  a scriptlet, JSP expression, or a custom tag to include server state in the jsp page output. Expression Language (EL) was first introduced in JSTL 1.0. EL makes it easier to integrate server side state with the presentation output. 

EL expression is always written between the delimiters ${ and }. In the JSP page response, the result of expression evaluation replaces the expression and its delimiters in the template text. Within tags, expression can be used only in attribute values.

The Expression Language has the following Basic Comparisons:

< >   <=   >=   lt   gt le  ge

= =  !=   eq  ne

&&   and

||  or

The code of the program is given below:

 

<html>
<head>
<title>Basic Comparisons</title>
</head>
<body>
<h1>Basic Comparisons</h1>
<hr>
In EL the following comparison operators are supported:
<ul>
<li>Less-than (&lt; or lt)</li>
<li>Greater-than (&gt; or gt)</li>
<li>Less-than-or-equal (&lt;= or le)</li>
<li>Greater-than-or-equal (&gt;= or ge)</li>
<li>Equal (== or eq)</li>
<li>Not Equal (!= or ne)</li>
</ul>
<blockquote>
<u><b>Numeric</b></u>
<code>
<table border="1">
<thead>
<td><b>EL Expression</b></td>
<td><b>Result</b></td>
</thead>
<tr>
<td>\${5 &lt; 7}</td>
<td>${5 < 7}</td>
</tr>
<tr>
<td>\${5 lt 7}</td>
<td>${5 lt 7}</td>
</tr>
<tr>
<td>\${4 &gt; (6/2)}</td>
<td>${4 > (6/2)}</td>
</tr>
<tr>
<td>\${4 &gt; (6/2)}</td>
<td>${4 > (6/2)}</td>
</tr>
<tr>
<td>\${6.0 &gt;= 3}</td>
<td>${6.0 >= 3}</td>
</tr>
<tr>
<td>\${6.0 ge 3}</td>
<td>${6.0 ge 3}</td>
</tr>
<tr>
<td>\${4 &lt;= 3}</td>
<td>${4 <= 3}</td>
</tr>
<tr>
<td>\${4 le 3}</td>
<td>${4 le 3}</td>
</tr>
<tr>
<td>\${2.0 == 2}</td>
<td>${2.0 == 2}</td>
</tr>
<tr>
<td>\${2.0 eq 2}</td>
<td>${2.0 eq 2}</td>
</tr>
<tr>
<td>\${(10*10) != 100}</td>
<td>${(10*10) != 100}</td>
</tr>
<tr>
<td>\${(10*10) ne 100}</td>
<td>${(10*10) ne 100}</td>
</tr>
</table>
</code>
</blockquote>
</body>
</html>

The output of the program is given below:

Download this example:

Advertisement

If you enjoyed this post then why not add us on Google+? Add us to your Circles



Liked it!  Share this Tutorial


Follow us on Twitter, or add us on Facebook or Google Plus to keep you updated with the recent trends of Java and other open source platforms.

Posted on: February 9, 2008

Related Tutorials

Discuss: EL Basic Comparisons  

Post your Comment


Your Name (*) :
Your Email :
Subject (*):
Your Comment (*):
  Reload Image
 
 
Comments:0
DMCA.com