Pakzilla

I am having a background of programming Java based web systems with RDBMS. Where I write a lot of JDBC code. Updates, select statements with a lot of joins, inserts etc is a part of my daily job. Most of my time consumed on maintaining the state of database, validating from base tables and after all storing [...]

Validating a file when it is getting uploaded in the system is some time very necessary. We can check the extension of the file, but what if user has changed the extension to crack the system. So the best way is to find the mime type. There are multiple libraries that you can use to [...]

I was playing with Posterous API to call it in Java program. If you guys want to call Posterous API, you need to get API Token from Posterous API Docs first. This API Token (api_token) will go with every URL that you will invoke in your code. I was missing this token and was wondering [...]

In this post you will find how we can integrate Spring with Struts2 through struts2-spring-plugin. And we will also see how we can use dependency injection. I assume that you are successfully running a Struts2 application. We will add our Spring integration code in that. Lets take a scenario. You have an Interface DAO.java that [...]

We widely use open source developer tools and libraries in our daily dev life. These open source things are driven by community. I am an open source fan. And I think I must contribute to some open source project. Umm yeah, before I become a contributor I must be an active user of that project. [...]

Following are the points that are highlighted in Kathi Sierra and Bert Bates book on SCJP6. 1-    Console class. 2-    NavigableSet and NavigableMap. 3-    Lower(int) and higher(int) function are added in Treeset collection. 4-    Polling method in TreeSet and TreeMap. 5-    TreeSet.descendingSet() and TreeMap.descendingMap(). Thanks to Bilal for discussing these points with me.

I was playing around with fetching Twitter followers and friends with Twitter4J. But it was taking time to do that. So I code it with using REST urls given by Twitter. It fetches all your friends or followers. Depending upon your application that you want one list or you want to use paging. But I [...]

From a recent announcement from Oracle under Sun Academic Initiative program (SAI). Now students can get Java certification voucher in $40 till 31st March 2010. This is an excellent opportunity for students. After this date they will give 40% discount on the actual price of the exam fee. Read more on SAI home page: All [...]

I  was stuck in a problem that how to re use access token, once user has authenticated by Twitter (on call back URL). I got it working. There was problem in my understanding about request token vs access token. When user first time comes on call backed URL. I take request token and token secret [...]

Its been a year since I purchased the voucher for SCJP 5.0. But I cant concentrate to have time to prepare it. From last night I have taken the oath to finally make it done. I have started with the book SCJP Sun Certified Programmer for Java 5 Study Guide (Exam 310-055) by Kathy Sierra [...]