Free eBook: The Complete Guide to Java Logging in Production

The Complete GitHub Logging Research: How the World’s Top Companies Choose How and What to Log We all use log files to monitor our applications in production. Some of us prefer using log management tools like Splunk or ELK, while others sift through raw logs on their notepad or terminal. It doesn’t matter if you choose the former or the ...

Read More »

What’s the missing link in a complete CI/CD toolchain and how can you add it to your workflow?

Companies and teams want to move fast. This includes frequent releases, constantly updating the product and keep team members on their toes about new and relevant technology. These needs led to the rise of continuous integration and continuous delivery practices. The current widespread understanding of the CI/CD cycle adds a lot of automation to test-build-deploy stages, but it misses out ...

Read More »

The AppD Approach: Java 9 Support

java-interview-questions-answers

Discover faster, more efficient performance monitoring with an enterprise APM product learning from your apps. Take the AppDynamics APM Guided Tour! Read more about the challenges posed by the Java 9 modularization feature, and the stringent requirements AppDynamics met to remain leaders in this space. We are excited to announce full support for Java 9 as part of our Winter ...

Read More »

Top 20 Online Programming Courses to Boost your Career

Do you want to know what is the best investment you can make with your time and money? Knowledge As a software developer you should be constantly acquiring new skills. This is the best way to advance your career and enjoy the rewards (monetary, emotional etc.). Towards that direction you should be reading books, devouring technical articles and staying informed ...

Read More »

Serverless: Getting started with SLAppForge Sigma

java-interview-questions-answers

Yo! C’mere. Lookn’ for somethn’? Serverless, ya? Up there. Go strait, ‘n take a right at da “Sigma” sign. (Well, don’t blame us yet; at least we thought it was that easy!) One of our dream goals was that working with Sigma should be a no-brainer, even for a complete stranger to AWS. However, in the (very likely) event that ...

Read More »

Serverless Revolution: the Good, the Bad and the Ugly

java-interview-questions-answers

“It’s stupidity. It’s worse than stupidity: it’s a marketing hype campaign.” ‐ Richard Stallman commenting on cloud computing, Sep 2008 And, after 10 years, you are beginning to think twice when someone mentions the word: is it that thing in the sky, or that other thing that is expected to host 83% of the world’s enterprise workloads by 2020? Another ...

Read More »

JDK 10: FutureTask Gets a toString()

I’ve felt for a long time that, for most Java classes that have distinguishing attributes, developers should take the time to override Object.toString(), even if it’s just with an IDE-generated implementation or using a library class such as Apache Commons Lang‘s ToStringBuilder. The overloaded Objects.toString() methods also make this easier than ever if one wants to implement toString by hand. ...

Read More »

Adding Visible Electronic Signatures To PDFs

I’m aware this is going to be a very niche topic. Electronically signing PDFs is far from a mainstream usecase. However, I’ll write it for two reasons – first, I think it will be very useful for those few who actually need it, and second, I think it will become more and more common as the eIDAS regulation gain popularity ...

Read More »

SpringBoot Messaging with RabbitMQ

spring-interview-questions-answers

RabbitMQ is one of the popular message broker solutions and provides client libraries to be used from various programming languages including Java, Scala, .NET, Go, Python, Ruby, PHP etc. In this tutorial, we will learn how to use RabbitMQ message broker to send and receive messages from a SpringBoot application. We will also look at how to send messages as JSON ...

Read More »

JDK 10: Accessing Java Application’s Process ID from Java

A popular question on StackOverflow.com is, “How can a Java program get its own process ID?” There are several answers associated with that question that include parsing the String returned by ManagementFactory.getRuntimeMXBean().getName() [but that can provide an “arbitrary string”], using ProcessHandle.getPid() [JEP 102], using Java Native Access (JNA), using System Information Gatherer And Reporter (SIGAR), using JavaSysMon, using Java Native ...

Read More »

How to fix Exception in thread “main” java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory in Java

This error means your code or any external library you are using in your application is using the SLF4J library, an open source logging library, but it is not able to find the required JAR file e.g. slf4j-api-1.7.2.jar hence it’s throwing Exception in thread “main” java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory. If you look at the error, you will see that it’s saying it is not ...

Read More »

What is SecurityContext and SecurityContextHolder in Spring Security?

spring-interview-questions-answers

The SecurityContext and SecurityContextHolder are two fundamental classes of Spring Security. The SecurityContext is used to store the details of the currently authenticated user, also known as a principle. So, if you have to get the username or any other user details, you need to get this SecurityContext first. The SecurityContextHolder is a helper class, which provide access to the security context. ...

Read More »
Want to take your Java skills to the next level?
Grab our programming books for FREE!
Here are some of the eBooks you will get:
  • Spring Interview QnA
  • Multithreading & Concurrency QnA
  • JPA Minibook
  • JVM Troubleshooting Guide
  • Advanced Java
  • Java Interview QnA
  • Java Design Patterns
The Spring Framework Cookbook
  • Learn the best practices of the Spring Framework
  • Build simple, portable, fast and flexible JVM-based systems and applications
  • Explore specific projects like Boot and Batch
The Spring Data Programming Cookbook
  • Learn how to use data access technologies and cloud-based data services
  • Set up the environment and create a basic project
  • Learn how to handle the various modules (e.g. JPA, MongoDB, Redis etc.)
The Selenium Programming Cookbook
  • Kick-start your own projects using this testing framework for web applications
  • Learn JUnit integration and Standalone Server functionality
  • Find out the most popular Interview Questions about the Selenium Framework
The Mockito Programming Cookbook
  • Kick-start your own web projects using this open source testing framework
  • Write simple test cases using the Mockito Framework
  • Learn how to integrate with JUnit, Maven and other frameworks
The JUnit Programming Cookbook
  • Learn basic usage and configuration of JUnit
  • Create multithreaded tests
  • Learn how to integrate with other testing frameworks
The JSF 2.0 Programming Cookbook
  • Build component-based user interfaces for web applications
  • Set up the environment and create a basic project
  • Learn Internationalization and Facelets Templates
The Amazon S3 Tutorial
  • Develop your own Amazon S3 based applications
  • Learn API usage and pricing
  • Get your own projects up and running in minimum time
Java Design Patterns
  • Learn how Design Patterns are implemented and utilized in Java
  • Understand the reasons why patterns are so important
  • Learn when and how to apply each one of them
Java Concurrency Essentials
  • Dive into the magic of concurrency
  • Learn about concepts like atomicity, synchronization and thread safety
  • Learn about testing concurrent applications
The IntelliJ IDEA Handbook
  • Kick-start your own programming projects using IntelliJ IDEA
  • Learn how to setup and install plugins
  • Create UIs with this Java integrated development environment
The Git Tutorial
  • Learn why Git differs from other version control systems
  • Explore Git's usage and best practises
  • Learn branching strategies
The Eclipse IDE Handbook
  • Explore the most widely used Java IDE
  • Learn how to setup and install plugins
  • Built your own projects up and running in minimum time
The Docker Containerization Cookbook
  • Explore the world’s leading software containerization platform
  • Learn how to wrap a piece of software in a complete filesystem
  • Learn how to use DNS and various commands
Developing Modern Applications With Scala
  • Develop modern Scala applications
  • Build SBT and reactive applications
  • Learn about testing and database access
The Apache Tomcat Cookbook
  • Explore Apache Tomcat open-source web server
  • Learn about installation, configuration, logging and clustering
  • Kick-start your own web projects using Apache Tomcat
The Apache Maven Cookbook
  • Explore the Apache Maven build automation tool
  • Learn about Maven's project structure and configuration
  • Learn about Maven's dependency management and plug-ins
The Apache Hadoop Cookbook
  • Explore the Apache Hadoop open-source software framework
  • Learn distributed caching and streaming
  • Kick-start your own web projects using Apache Hadoop
The Android Programming Cookbook
  • Explore the Android mobile operating system
  • Learn about services and page views
  • Learn about Google Maps and Bluetooth functionality
The Elasticsearch Tutorial
  • Explore the Elasticsearch search engine
  • Develop your own Elasticsearch based applications
  • Learn operations, Java API Integration and reporting
Amazon DynamoDB Tutorial
  • Develop your own Amazon DynamoDB based applications
  • Learn DynamoDB Concepts and Best Practices
  • Get your own projects up and running in minimum time
Java NIO Programming Cookbook
  • Learn features for intensive I/O operations
  • Follow a series of tutorials on Java NIO examples
  • Get knowledge on Java Nio Socket and Asynchronous Channels
JBoss Drools Cookbook
  • Explore Drools business rule management system
  • Follow a series of tutorials on Drools examples
  • Get knowledge on business rules for a shopping domain model
Vaadin Programming Cookbook
  • Explore Vaadin web framework for rich Internet applications
  • Learn the Architecture and Best Practices
  • Get knowledge on Data Binding and Custom Components
Groovy Programming Cookbook
  • Explore Apache Groovy object-oriented programming language
  • Create sample applications and explore interview questions
  • Get knowledge on Callback functionality and various widgets
GWT Programming Cookbook
  • Explore the open source Google Web Toolkit
  • Create sample applications and explore interview questions
  • Create and maintain complex JavaScript front-end applications in Java
Do you want to know how to develop your skillset to become a Java Rockstar?
Subscribe to our newsletter to start Rocking right now!
To get you started we give you our best selling eBooks for FREE!
1. JPA Mini Book
2. JVM Troubleshooting Guide
3. JUnit Tutorial for Unit Testing
4. Java Annotations Tutorial
5. Java Interview Questions
and many more ....
Email address:
Do you want to know how to develop your skillset to become a Java Rockstar?
Subscribe to our newsletter to start Rocking right now!
To get you started we give you our best selling eBooks for FREE!
1. JPA Mini Book
2. JVM Troubleshooting Guide
3. JUnit Tutorial for Unit Testing
4. Java Annotations Tutorial
5. Java Interview Questions
and many more ....
Email address:
Do you want to know how to develop your skillset to become a Java Rockstar?
Subscribe to our newsletter to start Rocking right now!
To get you started we give you our best selling eBooks for FREE!
1. JPA Mini Book
2. JVM Troubleshooting Guide
3. JUnit Tutorial for Unit Testing
4. Java Annotations Tutorial
5. Java Interview Questions
6. Spring Interview Questions
7. Android UI Design
and many more ....
Email address:
Want to be a DynamoDB Master ?
Subscribe to our newsletter and download the Amazon DynamoDB Tutorial right now!
In order to help you master this Amazon NoSQL database service, we have compiled a kick-ass guide with all the major DynamoDB features and use cases! Besides studying them online you may download the eBook in PDF format!
Email address:
Programming Interview Coming Up?
Subscribe to our newsletter and download the Ultimate Multithreading and Concurrency interview questions and answers collection right now!
In order to get you prepared for your next Programming Interview, we have compiled a huge list of relevant Questions and their respective Answers. Besides studying them online you may download the eBook in PDF format!
Email address:
Java Interview Coming Up?
Subscribe to our newsletter and download the Ultimate Spring interview questions and answers collection right now!
In order to get you prepared for your next Java Interview, we have compiled a huge list of relevant Questions and their respective Answers. Besides studying them online you may download the eBook in PDF format!
Email address:
Java Interview Coming Up?
Subscribe to our newsletter and download the Ultimate Java interview questions and answers collection right now!
In order to get you prepared for your next Java Interview, we have compiled a huge list of relevant Questions and their respective Answers. Besides studying them online you may download the eBook in PDF format!
Email address:
Want to be a Java NIO Master ?
Subscribe to our newsletter and download the Java NIO Programming Cookbook right now!
In order to help you master Java NIO Library, we have compiled a kick-ass guide with all the major Java NIO features and use cases! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to be a Drools Master ?
Subscribe to our newsletter and download the JBoss Drools Cookbook right now!
In order to help you master Drools Business Rule Management System, we have compiled a kick-ass guide with all the major Drools features and use cases! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to be an iText Master ?
Subscribe to our newsletter and download the iText Tutorial right now!
In order to help you master iText Library, we have compiled a kick-ass guide with all the major iText features and use cases! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to be an Elasticsearch Master ?
Subscribe to our newsletter and download the Elasticsearch Tutorial right now!
In order to help you master Elasticsearch search engine, we have compiled a kick-ass guide with all the major Elasticsearch features and use cases! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to be a Scala Master ?
Subscribe to our newsletter and download the Scala Cookbook right now!
In order to help you master Scala, we have compiled a kick-ass guide with all the basic concepts! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to be a JUnit Master ?
Subscribe to our newsletter and download the JUnit Programming Cookbook right now!
In order to help you master unit testing with JUnit, we have compiled a kick-ass guide with all the major JUnit features and use cases! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to master Amazon Web Services ?
Subscribe to our newsletter and download the Amazon S3 Tutorial right now!
In order to help you master the leading Web Services platform, we have compiled a kick-ass guide with all its major features and use cases! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to master Spring Framework ?
Subscribe to our newsletter and download the Spring Framework Cookbook right now!
In order to help you master the leading and innovative Java framework, we have compiled a kick-ass guide with all its major features and use cases! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to master Eclipse IDE ?
Subscribe to our newsletter and download the Eclipse IDE Handbook right now!
In order to help you master Eclipse, we have compiled a kick-ass guide with all the basic features of the popular IDE! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to master IntelliJ IDEA ?
Subscribe to our newsletter and download the IntelliJ IDEA Handbook right now!
In order to help you master IntelliJ IDEA, we have compiled a kick-ass guide with all the basic features of the popular IDE! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to master Docker ?
Subscribe to our newsletter and download the Docker Containerization Cookbook right now!
In order to help you master Docker, we have compiled a kick-ass guide with all the basic concepts of the Docker container system! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to create a kick-ass Android App ?
Subscribe to our newsletter and download the Android Programming Cookbook right now!
With this book, you will delve into the fundamentals of Android programming. You will understand user input, views and layouts. Furthermore, you will learn how to communicate over Bluetooth and also leverage Google Maps into your application!
Email address:
Want to be a GIT Master ?
Subscribe to our newsletter and download the GIT Tutorial eBook right now!
In order to help you master GIT, we have compiled a kick-ass guide with all the basic concepts of the GIT version control system! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to be a Hadoop Master ?
Subscribe to our newsletter and download the Apache Hadoop Cookbook right now!
In order to help you master Apache Hadoop, we have compiled a kick-ass guide with all the basic concepts of a Hadoop cluster! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to master Spring Data ?
Subscribe to our newsletter and download the Spring Data Ultimate Guide right now!
In order to help you master Spring Data, we have compiled a kick-ass guide with all the major features and use cases! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to create a kick-ass Android App ?
Subscribe to our newsletter and download the Android UI Design mini-book right now!
With this book, you will delve into the fundamentals of Android UI design. You will understand user input, views and layouts, as well as adapters and fragments. Furthermore, you will learn how to add multimedia to an app and also leverage themes and styles!
Email address:
Want to be a Java 8 Ninja ?
Subscribe to our newsletter and download the Java 8 Features Ultimate Guide right now!
In order to get you up to speed with the major Java 8 release, we have compiled a kick-ass guide with all the new features and goodies! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to master Java Annotations ?
Subscribe to our newsletter and download the Java Annotations Ultimate Guide right now!
In order to help you master the topic of Annotations, we have compiled a kick-ass guide with all the major features and use cases! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to be a JUnit Master ?
Subscribe to our newsletter and download the JUnit Ultimate Guide right now!
In order to help you master unit testing with JUnit, we have compiled a kick-ass guide with all the major JUnit features and use cases! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to master Java Abstraction ?
Subscribe to our newsletter and download the Abstraction in Java Ultimate Guide right now!
In order to help you master the topic of Abstraction, we have compiled a kick-ass guide with all the major features and use cases! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to master Java Reflection ?
Subscribe to our newsletter and download the Java Reflection Ultimate Guide right now!
In order to help you master the topic of Reflection, we have compiled a kick-ass guide with all the major features and use cases! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to be a JMeter Master ?
Subscribe to our newsletter and download the JMeter Ultimate Guide right now!
In order to help you master load testing with JMeter, we have compiled a kick-ass guide with all the major JMeter features and use cases! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to be a Servlets Master ?
Subscribe to our newsletter and download the Java Servlet Ultimate Guide right now!
In order to help you master programming with Java Servlets, we have compiled a kick-ass guide with all the major servlet API uses and showcases! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to be a JAXB Master ?
Subscribe to our newsletter and download the JAXB Ultimate Guide right now!
In order to help you master XML Binding with JAXB, we have compiled a kick-ass guide with all the major JAXB features and use cases! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to be a JDBC Master ?
Subscribe to our newsletter and download the JDBC Ultimate Guide right now!
In order to help you master database programming with JDBC, we have compiled a kick-ass guide with all the major JDBC features and use cases! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to be a JPA Master ?
Subscribe to our newsletter and download the JPA Ultimate Guide right now!
In order to help you master programming with JPA, we have compiled a kick-ass guide with all the major JPA features and use cases! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to be a Hibernate Master ?
Subscribe to our newsletter and download the Hibernate Ultimate Guide right now!
In order to help you master JPA and database programming with Hibernate, we have compiled a kick-ass guide with all the major Hibernate features and use cases! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to be a JSF Master ?
Subscribe to our newsletter and download the JSF 2.0 Programming Cookbook right now!
In order to get you prepared for your JSF development needs, we have compiled numerous recipes to help you kick-start your projects. Besides reading them online you may download the eBook in PDF format!
Email address:
Want to be a Java Master ?
Subscribe to our newsletter and download the Advanced Java Guide right now!
In order to help you master the Java programming language, we have compiled a kick-ass guide with all the must-know advanced Java features! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to be a Java Master ?
Subscribe to our newsletter and download the Java Design Patterns right now!
In order to help you master the Java programming language, we have compiled a kick-ass guide with all the must-know Design Patterns for Java! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to be a Hadoop Master ?
Subscribe to our newsletter and download the Hadoop Tutorial right now!
In order to help you master Apache Hadoop, we have compiled a kick-ass guide with all the basic concepts of a Hadoop cluster! Besides studying them online you may download the eBook in PDF format!
Email address:
Want to be an Elastic Beanstalk Master ?
Subscribe to our newsletter and download the Amazon Elastic Beanstalk Tutorial right now!
In order to help you master AWS Elastic Beanstalk, we have compiled a kick-ass guide with all the major Elastic Beanstalk features and use cases! Besides studying them online you may download the eBook in PDF format!
Email address:
Amazon Elastic Beanstalk Tutorial
  • Develop your own Amazon Elastic Beanstalk based applications
  • Learn Java Integration and Command Line Interfacing
  • Get your own projects up and running in minimum time
Want to take your Java skills to the next level?
Grab our programming books for FREE!
Here are some of the eBooks you will get:
  • Spring Interview QnA
  • Multithreading & Concurrency QnA
  • JPA Minibook
  • JVM Troubleshooting Guide
  • Advanced Java
  • Java Interview QnA
  • Java Design Patterns
Insiders are already enjoying weekly updates and complimentary whitepapers!
Join them now to gain exclusive access to the latest news in the Java world, as well as insights about Android, Scala, Groovy and other related technologies.
Email address:
Want to be an ActiveMQ Master ?
Subscribe to our newsletter and download the Apache ActiveMQ Cookbook right now!
In order to help you master Apache ActiveMQ JMS, we have compiled a kick-ass guide with all the major ActiveMQ features and use cases! Besides studying them online you may download the eBook in PDF format!
Email address:
Apache ActiveMQ Cookbook
  • Explore Apache ActiveMQ Best Practices
  • Learn ActiveMQ Load Balancing and File Transfer
  • Develop your own Apache ActiveMQ projects