Java Resources

HashMap questions are common in job interviews. Here's some in-depth explanation of how HashMaps work internally in Java.

September 12, 2016

by Jackson Joseraj

· 258,725 Views · 96 Likes

Mockito Basic Example Using JDBC

Object mocking frameworks use complex code generation and reflection to cut out a lot of boilerplate test code.

September 12, 2016

by Alan Hohn

· 174,161 Views · 18 Likes

Forbidden APIs of Java

Dealing with locale settings and APIs can be hazardous. Read on to find out how to deal with this situation!

September 9, 2016

by Furkan Kamaci

· 18,143 Views · 25 Likes

Creating a Simple Java REST Service Using HTTP-RPC

We take a look at how to implement a Java-based web service using the HTTP-RPC framework. Read on to find out how and for some example code.

September 8, 2016

by Greg Brown

· 13,333 Views · 7 Likes

How Netflix's Circuit Breaker Works

See how Netflix's microservices-oriented circuit breaker works to prevent cascade failures and other problems.

September 7, 2016

by Rafael Salerno

· 47,089 Views · 22 Likes

How to Debug Java Using a Decompiler

Decompiling Java code may not be something you do in daily development but it can help turn the tide when debugging critical problems.

September 6, 2016

by Freyja Spaven

· 13,358 Views · 5 Likes

How ConcurrentHashMap Works Internally in Java

Understanding how ConcurrentHashMap works with a list of concrete examples.

September 6, 2016

by Arun Pandey

CORE

· 483,055 Views · 66 Likes

JAX-WS With MTOM Using Mule

Want your XML to stay lightweight? See how to keep it that way to avoid bloated messages.

September 2, 2016

by Anil Kumar V

· 6,834 Views · 11 Likes

Different Types of References in Java

An explanation of the four main types of references in Java and how they are affected during Garbage Collection.

September 1, 2016

by Shaamik Mitraa

· 42,485 Views · 34 Likes

Best Practices for Code Documentation in Java

How to use JavaDoc effectively to communicate to your teammates what your code is supposed to do.

August 29, 2016

by Damian Wolf

· 107,680 Views · 24 Likes

Spring Data, MongoDB, and Java 8

Utilizing the latest Spring frameworks to convert Java 8 dates inside of MongoDB, simplifying a once difficult conversion task. Great concise NoSQL and Java tutorial.

August 29, 2016

by Yong Mook Kim

· 32,641 Views · 15 Likes

Memory Leaks and Java Code

When you aren't using objects, but they aren't touched by GC, a memory leak happens. Here are six ways memory leaks happen to look for and avoid.

August 29, 2016

by Shaamik Mitraa

· 69,678 Views · 43 Likes

Optional Parameters Handling Strategy in Java

A detailed comparison of six different ways of handling optional parameters in Java.

August 28, 2016

by Shaamik Mitraa

· 29,827 Views · 20 Likes

Understand Java Callable and Future

A tutorial to help you understand how to use Callable and Future in Java.

August 28, 2016

by Shaamik Mitraa

· 230,153 Views · 22 Likes

The Java Synchronizers

Java is chock-full of thread synchronization primitives. But which do you use when? Find out here.

August 26, 2016

by Carlos Morera

· 28,757 Views · 24 Likes

Introducing Redisson Live Objects (Object Hash Mapping)

An in-depth explanation of live objects and how Redisson Live objects map all fields within a Java class.

August 26, 2016

by Rui Gu

· 29,563 Views · 8 Likes

Integrating with Rabbit MQ Using Spring Integration Java DSL

Here's how to integrate RabbitMQ messaging using Spring Integration's Java language DSL for connecting complex enterprise systems.

August 25, 2016

by Biju Kunjummen

· 17,885 Views · 2 Likes

JUnit 5 Dynamic Tests — Generate Tests at Runtime

Knowing the difference between static and dynamic tests, and how to generate them at run-time.

August 25, 2016

by Michael Pham

· 34,256 Views · 10 Likes

Regular Expression to Validate a Comma-Separated List of Email Addresses

Need to validate a CSV-formatted list of email addresses? Check out this regular expression and how to use it!

August 24, 2016

by Greg Brown

· 40,445 Views · 5 Likes

Functional Default Arguments, Part One

The most widely-known workaround for defining default arguments for methods and constructors in Java uses method overloading, though varargs, null values, the builder pattern, and even maps have been used as well. Here we propose a new approach based on functional constructs.

August 22, 2016

by Federico Peralta Schaffner

· 54,488 Views · 20 Likes

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