To get stream of random integers, longs or doubles within a given range – use the ints(), longs() and doubles() methods in Random and SecureRandom classes.
Java Chatbot Example using AIML Library
In this Java AIML tutorial, we will learn to create demo chatbot application using AIML and NLP application program-ab hosted on google-code repository.
Java Stream Max and Min Examples
Learn to find min and max date, number, Char, String or object from stream of comparable elements in easy steps using Comparator.comparing() method.
HttpServletRequestWrapper Example to read request body 2 times
My requirement was to read the HTTP request body 2 times in servlet filter and the pass the request to filter chain. HttpServletRequestWrapper helped me.
Stream Count Number of Elements Example
To count the number of elements in stream in Java 8, use either the Stream.count() or Collectors.counting() methods.
Convert IntStream to Collection/Array
To convert primitives intstream or longstream to List, Set or Array, you can adapt one of the following ways given with examples.
Java 8 Boxed Stream Example
In Java 8, if you want to convert stream of objects to collection, then you can use one of the static methods in the Collectors class. The same process doesn’t work on streams of primitives, however. To convert a stream of primitives, you must first box the elements in their wrapper class and then collect […]
Spring Cloud Zipkin and Sleuth Example
Zipkin is very efficient tool for distributed tracing in microservices ecosystem. Distributed tracing, in general, is latency measurement of each component in a distributed transaction where multiple microservices are invoked to serve a single business usecase. Let’s say from our application, we have to call 4 different services/components for a transaction. Here with distributed tracing […]
ELK Stack Tutorial with Example
In this ELK tutorial, learn to integrate ELK stack in microservice ecosystem for distributed logs management and processing, and viewing logs in UI Console.
Spring 5 New Features and Enhancements
Spring 5 is the first major release, almost four years after Spring Framework 4.0. Lets quickly go through some exciting features coming in Spring 5.0.
Docker Tutorial with Hello World Example
Docker is a developer tool to package applications along with their runtime environment, so anybody can deploy and run them in any other machine without facing runtime environment conflicts. It is very similar to virtual machine concept (virtualization), where you can get a VM image and run it on any supporting hardware. All internal programs […]
Java 9 Features and Enhancements
Java 9 is bringing lots of new enhancements which are going to affect your programming style and habit, in big way. The biggest change is the modularization of Java. It’s another big change after Lambdas in Java 8. In this article, I am listing down changes which will be part of JDK 9 release. What […]
Java 9 Modules Tutorial
JPMS (Java Platform Module System) is the major enhancement in Java 9. It is also known as Project Jigsaw. In this Java 9 modules tutorial, we will learn about modules (in general) and how your programming style will change in future when you will start writing modular code.
Hoverfly – Microservices Virtualization Example
Learn about service virtualization concepts in detail and also look into a popular and useful service virtualization tool – Hoverfly. Also see how Hoverfly can be used to capture request/responses in proxy mode and use those captured responses while Hoverfly will run in simulation mode.
Dozer Bean Mapping Examples
Dozer is a powerful library which can help you in avoiding lots of unnecessary code, while you want to copy data from one bean to another bean. It is mainly bean to bean mapper that recursively copies data from one java object to another java object – attribute by attribute.
AWS Lambda Function Example
Today along with Microservices, another concept is very popular that is Serverless architecture. Serverless refers to the cloud deployment model with elasticity where you deploy your code/services to 3rd party cloud providers (e.g. AWS) instead of managing servers and platform manually. Cloud provider provides all infrastructure and platform support where you can just host your […]
Complete JShell Tutorial with Examples
JShell allows us to execute Java code snippets and get immediate results without having to create a solution or project or using any code editor.
Java 9 Stream of Dates with LocalDate.datesUntil()
Date/Time handling always been a pain area for java developers. The new Date-Time API added in Java 8 changed the way, you interact with dates in java. It was a very powerful and much needed improvement. The only thing missing was, getting a stream of dates having some common difference between two subsequent dates (though […]
Project Lombok – Eclipse Installation and Examples
Lombok is very handy tool for minimizing the boilerplate code as well as providing lot’s of other features such as lazy loading, thread safety or immutability. This is the reason it becoming very popular among the developer community.
Java 9 – Stream API Improvements
Learn new java 9 improvements in Stream API i.e. takeWhile / dropWhile methods, ofNullable and iterate methods with examples.