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JSTL Configuration Error
Author :
JavaBeat
Date : Fri Dec 24th, 2010
If you are getting the following error while running the JSP 2.0 in Tomcat server.
It means the application is missing JSTL jar file. If you add standard.jar and jstl.jar
the problem will be solved.
What is Immutable Objects in Java?
Author :
JavaBeat
Date : Fri Dec 3rd, 2010
An immutable object is something whose state can't be change after there creation, e.g. String objects. Once you have created a String object, you can't alter this.
Novice way to implement a Singleton
Author :
JavaBeat
Date : Fri Dec 3rd, 2010
Well, I have!!! The contract of Singleton class can be broken. Let's discuss Singleton pattern in Simple Threaded environment and then in next post I will discuss this pattern in Multithreaded environment.
What is Remote Debugging in Java?
Author :
JavaBeat
Date : Fri Dec 3rd, 2010
Consider a scenario where you can't run the application in your development environment, e.g. say your application can run only on a server machine (because it is dependent on some third party interface that are not accessible in your development machine) and you have to resolve a problem (bug). What you can do?
Runtime.addShutdownHook()
Author :
JavaBeat
Date : Sat Nov 20th, 2010
Write all the instructions(java code) in a thread's run method and call java.lang.Runtime.addShutdownHook(Thread t). This method will then register this thread with JVM's shutdown hook. At the time of shutting down, JVM will run these hooks in parallel (Thread will be started only at the time of shut down by JVM itself).
Static Code Analysis Tool - FireBugs
Author :
Monish
Date : Fri Mar 5th, 2010
Static Code Analysis Tool - FireBugs
Job Schedulers - UNIX
Author :
Monish
Date : Fri Feb 5th, 2010
We might have worked on various Job Scheduling Frameworks, one of the famous one that comes to our mind is Quartz. Yes quartz is a cool frameworks which has advanced error handling, job scheduling and various other great feature. Recently while trying to create a scheduling task for a task in UNIX I decided to check out the inbuilt job scheduling component
java.lang.OutOfMemoryError: PermGen space
Author :
Monish
Date : Sun Jan 31st, 2010
Permgen Space is the space where the class files are all loaded for the first time and there after they are loaded or referenced from there. This error means there is a hell lot of duplicate classes being loaded and not all are being unloaded.
java.lang.OutOfMemoryError: Java heap space
Author :
Monish
Date : Sat Jan 30th, 2010
What does it means - Means there is a hell lot of objects being created and not all are being marked for GC. These stray objects are cluttering the heap space and resulting in this error. This is basically a memory leak.
My Young Vertor Experience
Author :
JavaBeat
Date : Mon Oct 26th, 2009
It was all of a sudden that Vertor descended upon my life and, as it turned out later, much to my relief and enjoyment. Since my schooldays, I had become a kind of IT geek,
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