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 Implement Simple Circular ArrayList in Java?

September 4th, 2019 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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Memcached Java Client Tutorial using whalin.Memcached-Java-Client and googlecode.xmemcached Libraries

September 1st, 2019 by App Shah 1

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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Better Logging for your Enterprise Java Application – CrunchifyBetterLog4jLogging.java

August 28th, 2019 by App Shah

If you are developing Java Application where you need to use the logger functionality, there are number of ways you could enhance the Logger Utility. To make sure that logging can be left ...
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How to stop/kill long running Java Thread at runtime? timed-out -> cancelled -> interrupted states

July 25th, 2019 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 Java How to Print all Environment Properties value using ProcessBuilder?

August 1st, 2019 by App Shah 2

When you run Java Program locally in Terminal Window or in Eclipse IDE, there are lots of Environment Variable which plays key role during program execution. Here are list of Environment ...
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In Java How to Get Random Element from ArrayList and ThreadLocalRandom Usage

June 16th, 2019 by App Shah 2

Java is pretty amazing. Sometimes during mock testing you may need to generate Random number like Integer or Double or Long or String from ArrayList. In this tutorial we will create ...
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How to use Spring Framework StopWatch() to Log ExecutionTime and ElapseTime of any Java Thread

June 2nd, 2019 by App Shah 3

Spring Framework - StopWatch() is a very handy utility for any Java developer if you have small Java application or production ready application. Most of the Java applications involve Thread ...
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How to fix UnsupportedClassVersionError: Class has been compiled by a more recent version of the Java Runtime

May 11th, 2019 by App Shah

Today after installing Java 12 on my laptop, I started seeing some issue about compiler version mismatch. In this tutorial we will go over steps on how to fix these ...
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JVM Tuning: Heapsize, Stacksize and Garbage Collection Fundamental

May 10th, 2019 by App Shah 16

Heap Size: When a Java program starts, Java Virtual Machine gets some memory from Operating System. Java Virtual Machine or JVM uses this memory for all its need and part of this memory is ...
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