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40 Java Collections Interview Questions and Answers
Java Collections Framework are the fundamental aspect of java programming language. It’s one of the important topic for java interview questions. Here I am listing some important ...
Java Thread Pool Example using Executors and ThreadPoolExecutor
A thread pool manages the pool of worker threads, it contains a queue that keeps tasks waiting to get executed. A thread pool manages the collection of Runnable threads and worker threads ...
Java Deadlock Example – How to analyze deadlock situation
Deadlock is a programming situation where two or more threads are blocked forever, this situation arises with at least two threads and two or more resources. Here I have written a simple ...
Java Annotations Tutorial with Custom Annotation
Java Annotations provide information about the code and they have no direct effect on the code they annotate. In this tutorial, we will learn about Java annotations, how to write custom ...
Java Regular Expression Tutorial with Examples
When I started my career in java, regular expressions were a nightmare for me. This tutorial is aimed to help you mastering java regular expression and for me to come back at regular ...
Rest using Jersey – Complete Tutorial with JAXB, Exception Handling and Client Program
Recently I started working on a Restful web service project using Jersey API. There are some tutorials available online but I faced some issues with exception handling and I didn’t ...
Generate QR Code image from Java Program
If you are tech and gadget savvy, then you must be aware of QR codes. You will find it everywhere these days – in blogs, websites and even in some public places. This is very popular ...
How to Avoid ConcurrentModificationException when using an Iterator
Java Collection classes are fail-fast which means that if the Collection will be changed while some thread is traversing over it using iterator, the iterator.next() will throw a ConcurrentModificationException. ...
Understanding and Extending Java ClassLoader
The Java ClassLoader is one of the crucial but rarely used components of Java in Project Development. Personally I have never extended ClassLoader in any of my projects but the idea ...
