Have you ever encountered a surprise while using toLowerCase()? This is a widely used method when it comes to strings and case conversion. There is a nice little thing you should be aware of. toLowerCase() respects internationalization (i18n). It performs the case conversion with respect to your Locale. When you call toLowerCase(), internally toLowerCase(Locale.getDefault()) is [...]
The java system code that is part of the JDK is considered God and has all the maximum privileges. For example it can read a system property by default. To easily understand it is better to consider java Applets. An Applet cannot read a system property by default because it belongs to different CodeSource and [...]
In recent days generalization have become popular in software development. You build a common platform and generate applications out of it to reduce the cost. In such applications an activity that will be frequently performed is serializing java objects to database. There are many fancy tools and framework available to do this. Before using all [...]
It was a bumpy ride in 2009. Many highs and lows. I enjoyed every moment of it. December 2009 is an important month for javapapers. My hosting provider GoDaddy kept me completely busy. As almost everybody ;-) in the web world I also got my due share of problems from Go Daddy. It all started [...]
Have you ever seen what is inside a serialized object? I will explain you what is java serialization, then provide you with a sample for serialization. Finally most importantly, lets explore what is inside a serialized object and what it means. That is internals of java serialization and how does it works. If you want [...]
Peer classes are written by java API developers to interface with native objects. Peer classes should be rightly mentioned as peer interfaces. You can program for the interface as if you are connecting to the C / C++ or any native objects. After doing the programming, you can use javah command line tool that is [...]
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 [...]
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 [...]
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 [...]
