If you are not familiar with the Jakarta Commons, you have likely reinvented a few wheels.
The new chapter will include a solution to one of the most frequently heard complaints about Struts: that it doesn't provide a simple way to meaningfully nest POJO graphs in ActionForms. The provided example code solves this problem and includes an integrated solution for automating conversion, formatting, and validation.
long durationSeconds = 28800; // 8 hours
response.setDateHeader("Expires",
System.currentTimeMillis()
+ (duractionSeconds * 1000));
response.setHeader("Cache-Control",
"public, max-age="
+ durationSeconds);
chain.doFilter(request, response);
Extend log4j to support lightweight over-the-network logging.
This page and its children talk about unit testing with the Mock Objects pattern. In particular, it covers what Mock Objects are, what tools the author (Ben Teese) have used, and important lessons he has learnt along the way.
If J2EE based portals, JSR 168 or WSRP mean anything to you, you have come to the right place. This is a gathering of developers and technical experts working on Portals and related technologies. Here you will find open source projects, articles, tips, news, product announcements, blogs and FAQs. This community is also dedicated to creating a repository of open source and free JSR 168 compliant portlets that can be used on any J2EE portal server available in the market today. This is a great place to obtain portlets, learn, discuss, share knowledge and publicize your work.
AOP (Aspect oriented Programming) enables clean modularization of crosscutting concerns, such as error checking and handling, synchronization, context-sensitive behavior, performance optimizations, monitoring and logging, debugging support, and multi-object protocols
A fun day of coding with gridbags.
Effective Java: "Joshua Bloch's book Effective Java Programming Language Guide" is about tips and tricks about java.
public boolean equals(Object o) {
if (! (o instanceof MyObject)) {
return false;
}
MyObject other = (MyObject) o;
return (value == null ? other.value == null :
value.equals(other.value));
}
public boolean equals(Object o) {
if ((o == null) || (this.getClass() != o.getClass())) {
return false;
}
MyObject other = (MyObject) o;
return (value == null ? other.value == null :
value.equals(other.value));
}
a.equals(b) then b.equals(c) must be true.
... Class A...
public boolean equalsFalse(Object o) {
if (! (o instanceof A)) {
return false;
}
...
}
}
... Class B extends A...
public boolean equalsFalse(Object o) {
if (! (o instanceof B)) {
return false;
}
...
}
}
A a = new A();
B b = new B();
a.equals(b); <- would return true
b.equals(a); <- would return false
a.equals(b); <- would return false
b.equals(a); <- would return false.
Which means the symmetric isn't broke!
Write a Webserver in 100 Lines of Code or Less by Jonathan Johnson -- REAL Software programmer and tester, Jonathan Johnson, shows you the power and simplicity of developing with REALbasic by walking you through the building of a working webserver. After this tutorial, you'll not only have a pratical knowledge or REALbasic, but you'll have a cool little server too.