May 2001
Intermediate to advanced
1088 pages
30h 13m
English
Content preview from Special Edition Using Java™ 2 Enterprise EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Declaring Methods and Variables with <%! %>
So far, you have seen how to insert Java statements and Java expressions into your code. In case you haven't realized it yet, all the code within the <% %> tags and all the expressions within the <%= %> tags belong to one big Java method in the generated servlet. That is why you can use the <%= %> tags to display a variable that was declared inside the <% %> tags.
You might want to put an entire Java method into a JSP. If you try to declare a method within the <% %> tags, the Java compiler reports an error. It won't let you declare a method within another method.
Use the <%! %> tags to enclose any declarations that belong outside the big method that generates the page. Listing 14.8 shows a JSP file ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.