Java and J2EE Tutorials 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.

How to add Resources Folder, Properties at Runtime into IntelliJ classpath? Adding Property files to Classpath

March 16th, 2020 by App Shah 4

Getting NullPointerException while reading Resource .properties file in Intellij IDE? Do you have an issue loading resources files into your Intellij IDE? Having below errors? Error: ...
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How to Remove Duplicate Elements from CSV or any other File in Java?

February 14th, 2020 by App Shah

Finding a duplicate lines from a file is not a hard problem. But sometime in an interview question, folks sometimes get very confused about the method they have to use. In this tutorial ...
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How to create executable .jar file using Linux commands and without Eclipse Shortcut?

January 28th, 2020 by App Shah

So far for me it it was so easy to right click in Eclipse IDE and create executable .jar file with few simple clicks. Last week I had to create executable .jar file manually on my Digital ...
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Have you noticed Race Condition in Java Multi-threading Concurrency Example? How to deal with it?

December 12th, 2019 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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In Java How to Perform File Search Operation using java.nio.file interface? Tutorial on File and Directory Operations

December 1st, 2019 by App Shah

Java 8 has so many new functionalities and collection of features which are hidden inside packages. In this tutorial we will go over java.nio.file.Path interface. Path is an object that ...
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How to Create Your Own Non-Blocking, Fixed Size Queue in Java? Same as EvictingQueue

March 6th, 2020 by App Shah 3

If you don't want to use Google Guava's EvictingQueue external dependency in your Java Enterprise Project then you should consider creating your own non-blocking, fixed size ...
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Java eNum Comparison using Equals (==) operator, Switch-Case statement and .equals() method – Complete Tutorial

November 3rd, 2019 by App Shah 4

Sometime back I've written an article on Java eNum - Why and for what should I use Java eNum? What is an eNum type? It is a special data type to which we could assign predefined constants ...
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Java: How to Get Random Key-Value Element From HashMap

October 26th, 2019 by App Shah 2

Is there a way to get the value of a HashMap randomly in Java? Of Course, below is a simple Java Code which represents the same. Also, at the end of program there is a bonus code to ...
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In Java how to Delete Files, Folders from Windows, Mac OS X and Linux OS?

October 17th, 2019 by App Shah

Sometime back I've written an article on how to remove /tmp or unnecessary files / folder on Linux automatically via script? Now it's time to write the same utility for Windows ...
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