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.

What is Lock(), UnLock(), ReentrantLock(), TryLock() and How it’s different from Synchronized Block in Java?

March 23rd, 2019 by App Shah

In this tutorial we will go over Lock(), UnLock(), ReentrantLock(), TryLock() and how it's different from Synchronized Block in Java. If you have also below questions then you are at ...
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PayPal Java SDK Complete Example – How to Invoke PayPal Authorization REST API using Java Client?

March 17th, 2019 by App Shah 1

PayPal is one of the best online Payment transfer service out there. There is no doubt it's growing day by day with crazy numbers. I personally have hands on experience with PayPal Java ...
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In Java How to Sort a Map on the Values? The Map Interface – Java Collections

March 13th, 2019 by App Shah

In Java How to sort a Map on Value? There are number of ways. Here we will follow below steps. [crayon-5c9a7a5abe127109790332/] An object that maps keys to values. A map cannot contain ...
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How to use Spring Framework StopWatch() to Log ExecutionTime and ElapseTime of any Java Thread

March 8th, 2019 by App Shah 2

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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Java: Producer Consumer Example – Handle Concurrent Read/Write

February 16th, 2019 by App Shah 3

The producer-consumer problem (also known as the bounded-buffer problem) is a classic Java Example of a multi-process synchronization problem. The problem describes two processes, the ...
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What is Logback.xml Logging Framework? ConsoleAppender, FileAppender and RollingFileAppender Example

February 12th, 2019 by App Shah 2

Are you aware of Logback Logging Framework? Well, most of the people mainly use log4j and slf4j into their project. Since last 6 months I've been using Logback.xml logging framework and I ...
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In Java How to find a Line with Maximum Number of Words? Using Stream.forEach() Iterator

January 30th, 2019 by App Shah

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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Java ConcurrentNavigableMap and ConcurrentSkipListMap Tutorial with all Details (java.util.concurrent.*)

January 29th, 2019 by App Shah

Sometime back I've written an article on difference between HashMap, ConcurentHashMap and SynchronizedMap. In this tutorial we will go over ConcurrentNavigableMap and ConcurrentSkipListMap ...
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Simplest way to generate logs in Java using java.util.logging’s SimpleFormatter and XMLFormatter

January 27th, 2019 by App Shah

Java comes with lots of utilities. In this tutorial we will go over simplest way to generate log files using SimpleFormatter and XMLFormatter. On Crunchify, we have published few ...
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