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.

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

November 17th, 2019 by App Shah 1

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

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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In Java How to find a Line with Maximum Number of Words? Using Stream.forEach() Iterator

October 7th, 2019 by App Shah 1

For any given file, Write a Java program to find a line with maximum number of words in it is a very common interview question. In other words, write a Java program to find longest line from ...
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What is Thread-Safe BlockingQueue in Java? When should you use it? Implementation Attached

September 21st, 2019 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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4 Ways to Check if Array Contains a Specific Value in Java8? IntStream and Arrays.asList Tutorial

September 10th, 2019 by App Shah 1

This is the simplest and complete solution for your if you want to check if ArrayList contains specific value such as String, Integer, Long or Double. With the combination of Java7 and ...
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In Java How to Set and Get Thread Priority? Get Thread ID, Count, Class, StackTrace, ThreadGroup and More

September 5th, 2019 by App Shah 1

In Java multithreading programming, sometimes you may need to set Thread priority in order for it to execute before another thread. You can set and get Thread priority programmatically ...
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