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.

Java Hashmap – containsKey(Object key) and containsValue(Object value) – Check if Key/Value Exists in Map

December 12th, 2018 by App Shah

There are few concepts and technologies which comes by default with each and every programing language and Collection is one of them. Java Collection is a very big field. It comes with ...
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Memcached Java Client Tutorial using whalin.Memcached-Java-Client and googlecode.xmemcached Libraries

December 7th, 2018 by App Shah

This is continued tutorial on Memcached which is distributed memory object caching server. Here are previous two tutorials before you go over this one :) . How to Install and Configure ...
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How to stop/kill long running Java Thread at runtime? timed-out -> cancelled -> interrupted states

December 6th, 2018 by App Shah 2

Have you ever wondered how to kill long running Java thread? Do you have any of below questions? Kill/Stop a thread after certain period of time Killing thread after some specified ...
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In Java8 How to join List of Objects? Collectors.joining Concatenates the input Elements, separated by the Delimiter

December 13th, 2018 by App Shah

Collectors.joining() Concatenates the input Elements, separated by the Delimiter with provided Prefix and Suffix values. Yesterday I've published an article on StringJoiner(), ...
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Java: How to Get Random Key-Value Element From HashMap

October 25th, 2018 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 best way to Convert File into a Bytes (Array of Bytes)

September 25th, 2018 by App Shah 3

Sometime back I've written some articles on convert Byte[] Array To String, Convert Char Array to String, convert String to Char Array, convert Arrays to Set, etc. In this tutorial we ...
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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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