1. Joda-Time :- An easy replacement for the official Java date/Time classes. Many are suffering from the bad design of the official date/time.
This library helps you to solve almost every date/time issue faced by java developer.
http://joda-time.sourceforge.net/
2.Apache-Commons:- An extension to the Core functionality of Java.
a)BeanUtils:- Provides methods to handle the Beans. eg: BeanUtils.copyProperties(targetBean,sourceBean); to copy the values of similar properties.
b)Lang :- Provides extra functionalities to handle the java.lang classes. eg: StringUtils.isEmpty(str);
3.Google Guava :- Something similar to Apache commons.
4.Apache Lucene (http://lucene.apache.org/) : A must-have library for indexing. Add Lucene to speedup your searching.
5.iText:- For PDF processing
6.Apache POI :- For Processing various file formats like word,spreadsheet,Open XML standards etc.
Sorry to sound a little harsh, but do you know that entire web sites like for example http://java-source.net/ already list the most popular time-saving open-source java libraries ?
Thanks for the link. I wasn’t really aware of that.
have used iText and POI libraries in few of my projects earlier. More useful libraries.
Nice to hear. Thanks
Very Fine one..Good
There are significant differences between Google Guava and Apache Commons. Guava uses generics type so it is easier to build type safe software. Apache Commons is much older (older than generics also), better tested, and more powerfull but Guava keeps growing (but still has some anoying errors). I’ve decided to use Guava in my projects because I consider it as the near future replacement for Apache Commons.