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Most Recent Tutorials

  • How to convert String ArrayList to Array in Java

    One of the common task in Java is to convert between an arraylist and an array. This should not be difficult right ? Why because arraylist stores its

  • How to install xCache on a CentOS 7 VPS

    XCache is a free and open source PHP opcode cacher. Using xCache you can have better performance of your PHP scripts execution on your linux vps.

  • Difference between Overriding and Overloading

    Difference between Overloading and Overriding is probably one of the oldest OOPS interview question, but it is still very relevant. If you want to tes

  • How to use keytool command to create keyStore in Java

    keytool is a binary utility which comes along JDK installation. After installing JDK, you can go to the bin directory and can find this command. It is

  • Linux Interview Questions from Java Interviews

    Lots of Java application runs on UNIX operating system e.g. RedHat Enterprise Linux or Solaris, thats why you will see lots of Linux or Solaris based

  • ServletContext vs ServletConfig

    ServletContext and ServletConfig are two key object from Servlet world. There is only one ServeltContext per web application but there can be multiple

  • What is a Blank Final Variable in Java

    Final is a very special keyword in Java. You can apply final keyword to variable, method and classes, but do you know what is a blank final variable?

  • 6 rules of Method Overriding in Java

    Method overriding is very powerful feature of Java programming language, it allows you to add flexibility in your program, which is key for maintenanc

  • Some tricky questions from Java Interviews

    Some questions are not so easy to answer, they had something out of ordinary on them, which makes them tricky. Following is collection of some of the

  • Top features of Java 1.5

    Java 1.5 was one of the biggest release in Java. It introduce lot of useful features e.g. Enum, Generics, Autoboxing, Variable arguments and Static im

  • What is Action class in Struts Framework

    Action class is in heart of Struts MVC framework, this article gives brief overview of Action classes and different types of Action in Struts.

  • How to use CopyOnWriteArrayList in Java

    CopyOnWriteArrayList was added in JDK 1.5 but not many programmer are aware of this handy implementation of List interface. It is very useful in concu