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  • Java Garbage Collection Tutorial

    This tutorial explains about what is garbage collection in java
  • How to use Enum as Singleton in Java with Example

    From Java 5 onwards there is a new way to implement Singleton design pattern, by using Enum. Enum has some distinct benefits in terms of thread-safety
  • What is builder pattern in Java with real life Example

    Builder pattern in Java is used to create objects with lots of mandatory and option value. Since after 4 or 5 arguments constructor started getting ug
  • What is UseCompressedOops option in 64 bit JVM - Java

    -XX:UseCompressedOops is a JVM command line option which is provided in 64 bit hotspot JVM. Since size of OOPS is larger in 64 bit JVM which reduces C
  • How to use JUnit 4 Annotation with Examples

    Junit is best framework for writing unit tests and with introduction of annotations on JUnit 4 its become even more sophisticated and easier but In or
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    • Cat:Misc

  • How to create database connection pool in Spring Java

    Step by Step guide on how to create JDBC connection pool in Spring framework. Spring allows you to create JDBC pool directly or access it using JNDI.
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    • Cat:Spring

  • What is NullPointerException in Java how to deal

    Java.lang.NullPointerException comes when we try to access any field or method on Object which is null. Its come mainly due to programming mistake and
  • What is design pattern in Java - Interview preparation

    Questions from design pattern and software design are always have places in most programming interviews does not matter its Java or C#. This become ev
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    • Cat:Misc

  • How to deal with Passwords in Java

    Worth reading for all Java developers who are involve in coding secure enterprise application and deal with sensitive data like SSN, Password and Bank
  • What is ThreadLocal in Java with Example

    ThreadLocal is another way to obtain thread safety in Java. you can share expensive object as ThreadLocal to get benefit of multi-threading with reduc
  • What is .class file in Java - Fundamentals

    Class file in Java is core of Java platform independence feature. When you compile Java source file it generates number of class file based upon num
  • Java Reflection Example - accessing private field

    One of the most powerful feature of Reflection is able to access private members. Since private is highest form of encapsulation in Java and Reflecti
  • What is type 2 and type 4 JDBC Driver in Java

    There are 4 types of JDBC drivers in Java. type 4 drivers are most advanced and fast and same time easy to use. Just include the jar file of driver. O
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    • Cat:JDBC

  • how to use lable with break and continue in Java loops

    description of how you can use label inside nested loop along with break and continue statement in Java program. nested loop is required in many algor
  • What is default Bean Scope in Spring framework

    Apart from standard bean scope like Singleton, prototype, request, session and global Session, There is new bean scope added in Spring called thread s
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    • Cat:Spring

  • Difference between Web Server and Application Server

    Web Server and Application server are part of J2EE Stack and used to host Java applications. An important difference between application Server and we
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    • Cat:J2EE

  • Difference between java vs javaw command of JDK

    what is difference between java.exe and javaw.exe. This is one question asked to one of my friend recently, well both javaw and java command comes alo
  • Java program to reverse number in Java

    Simple Java program which teaches how to reverse Java program by using arithmetic operator in Java. In order to reverse digit of a number you need to