Java Blog
This is my blog on java, servlets, JSP and design patterns. This might help you to keep your java knowledge updated and also to prepare for your java interview, sun java certification. Its all there, it is left to you how to use it! I started this blog with a selfish reason, just to keep my java knowledge updated and to keep log of the questions that arise in my mind. Now it has turned out to be a full blown java tutorial site with lots of java interview questions and articles. Good day!
Recent Java Articles:
Pattern is a defined, used and tested solution for a know problem. Design patterns is all about re-use. Software design patterns evolved as a subject of study only when object oriented programming started becoming popular. OOPS and design patterns became inseparable.
In OOPS, we should have well defined boundaries for objects. That is every object should [...]
October 27th, 2009
You have been told many times, don’t use + (java plus operator) to concatenate Strings. We all know that it is not good for performance. Have you researched it? Do you know what is happening behind the hood? Lets explore all about String concatenation now.
In the initial ages of java around jdk 1.2 every body [...]
October 21st, 2009
Do you know what is coming on October 30th, 2009? A comet like Shoemaker-Levy is going to hit Earth and break it into pieces! Or sky is going to fall on our heads. Nothing of that sort is going to happen. It is end of life for J2SE version 1.5 (JDK 1.5). That is, it [...]
October 20th, 2009
DecimalFormat class which is extended from NumberFormat allows you to format a number (both decimal and integer) into a beautified String. It can be used to display in reports in general. DecimalFormat also helps to parse number from String literals.
It can be used in localized application also. That is you can use it based on [...]
October 19th, 2009
When you work in an internationalized application java number formats are going to be a head ache. Always use appropriate tools for its respective task. Though you can use a sledge hammer to open a can it is not meant for that. And there is a high possibility that the can might break.
If you are [...]
October 13th, 2009
Overflow and underflow is a condition where you cross the limit of prescribed size for a data type. When overflow or underflow condition is reached, either the program will crash or the underlying implementation of the programming language will have its own way of handing things.
In Java arithmetic operators don’t report overflow and underflow conditions. [...]
October 13th, 2009
Before going into URL and URI,
you need to know some background. Do you ever thought about, who decides what is URL? and what is URI? or who is the authority for URL, URI and such naming conventions?
W3C and IETF
There are two separate bodies W3C and IETF. The World Wide Web Consortium (W3C) is the main [...]
October 7th, 2009
Conceptually overloading and overriding is way different. Only the notion about interface name is same in both cases. Other than that, you cannot find a common thing between them.
Overloading is using the same interface but with different inputs and getting different behaviour as output. Slightly confusing right. I hope by end of this article you [...]
October 3rd, 2009
Clone (κλών) is a Greek word meaning “branch”, referring to the process whereby a new plant can be created from a twig. In biology it is about copying the DNAs. In real world, if you clone Marilyn Monroe, will you get a copy of her with same beauty and characteristics? No, you will not get! [...]
September 28th, 2009
I do build crazy buildings using my collection of Lego blocks. My 11 months old kid Ben curiously stares at me build it. He always wishes to get hold of it. After I complete the building when I give that to his hand, you know what the first thing he does.
Modify the building blocks. Though [...]
September 25th, 2009
