Java & J2EE Archives...

One of my favorite language Java is a programming language and computing platform developed by Sun which is acquired by Oracle now. J2EE is Java Enterprise Edition, which consists of core Java with a powerful set of libraries.

On Crunchify, we do have more than 400+ Java and J2EE tips with additional production ready utilities. Explore all tutorials below.

Have you noticed Race Condition in Java Multi-threading Concurrency Example? How to deal with it?

September 19th, 2018 by App Shah 4

Sometime back I've written an article on Producer Consumer Example and how to handle read/write operation better way in Java. On the similar note, in this tutorial we will discuss something ...
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What is Thread-Safe BlockingQueue in Java? When should you use it? Implementation Attached

September 3rd, 2018 by App Shah 2

So far I've written two articles on Producer Consumer concept on Crunchify. 1st one to explain Java Semaphore and Mutex and 2nd one to explain Concurrent Read/Write. In this Java Tutorial ...
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How to Read config.properties value using Spring MVC ‘singleton’ Scope in Java?

August 28th, 2018 by App Shah 6

Sometime back I have written a tutorial on how to read config file in tradition way. But what if you want to load it as a Spring MVC framework? It is most common that you may need to ...
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In Java How to Move all 0’s to end of Array Preserving Order of an Array? [2 ways]

August 28th, 2018 by App Shah

I've been playing with a problem of moving all 0's to end of Arrays in different interviews in various combinations. Sometimes I ask to move all 0 to front of array, sorting an array without ...
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Java 8 Stream API Operations and Lambda Expression Tutorial

August 26th, 2018 by App Shah

Java is a collection of APIs and with the introduction of Java 8, we do have more choice than before. java.util.stream API supports functional-style operations on streams of elements, ...
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How to Implement Simple Circular ArrayList in Java?

August 25th, 2018 by App Shah

In this tutorial we will go over details on how to implement Circular ArrayList. There are numerous examples we have on Crunchify about ArrayList and this one will be with Integer ...
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What is RegEx Pattern (Regular Expression)? How to use it in Java? Example Attached

August 19th, 2018 by App Shah

What is RegEx? Regular Expression is a search pattern for String. java.util.regex Classes for matching character sequences against patterns specified by regular expressions in Java. You ...
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Java Collections – hashCode() and equals() – How to Override equals() and hashcode() Method in Java?

August 28th, 2018 by App Shah

equals() and hashCode() in Java are two fundamental method which is declared in Object class and part or core Java library. If you have any one of below concerns in Java then you are at ...
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When Should I use CopyOnWriteArrayList Vs. ArrayList in Java? Avoid java.util.ConcurrentModification Exception

July 23rd, 2018 by App Shah 4

java.util.List is an ordered collection also known as a sequence. Arraylist is a very basic implementation of List. There are number of articles I've posted on Crunchify before on ArrayList ...
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