Java

Hacking Into A Java Class

Official Java Docs may call it Anonymous Inner Classes or name it with some other heavy-weight formal jargon, but I would like to call it hacking into a Java class because with this technique you can inject your code into an existing class method.

For example, if you have a message…

How To Create A Maven Webapp In Eclipse?

I like Maven because it makes dependency resolution easier and I like Eclipse because it is lightweight (at least lighter than other Java IDEs) and configurable. But I hate when it comes to creating a Maven webapp in Eclipse because it is overly complicated…

Java Nested Classes In A NutShell

The Java programming language allows you to define a class within another class. Such a class is called a nested class and is illustrated here:

[sourcecode language=”java”]
class OuterClass {

java.lang.NoClassDefFoundError: javax/servlet/jsp/jstl/core/Config

I created a Maven (maven-archetype-webapp) application and applied mvn eclipse:eclipse on it to make it compatible with Eclipse. When I ran the project I hit this exception:

SpringSecurity: Capturing RememberMe Success Event

I really like Spring Security because with very little configuration, you can add a bunch of powerful features to your application. Form based logins, auto-logins based upon remember me cookies, password hashing, session management, powerful…

How To Uncompress/Extract Java .war File

1. Open terminal
2. Go to the directory where .war file is placed with cd command.
3. Issue this command to extract/un-compress war file
   $ jar -xvf my_war_file.war

Thats it!

How to View Live Tomcat Logs/Output On Linux?

When you run tomcat on linux with startup.sh shell script, unlike windows console, you won’t see complete logs. You will only see this

But , almost every time, you will be required to see the logs. Tomcat saves its logs in a…