Java Blogs

Nuwan Zen

4 min readMar 30, 2021

Java 11 New Features

Java 11: Flight Recorder

Java 11 made Flight Recorder free to use.

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Java11: ChaCha20 Encryption

Java 11 comes with ChaCha20 steam cipher. Let’s see how to use it.

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Java 10 New Features

Java 10: Local Variable Type Inference

Java 10 allows you to use var as type variable instead of real type name.

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Java 9 New Features

Java9: Private Interface Methods

Java9 allows to have private interface methods so that the default methods can use them reduce repeating codes.

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Java9: Collections Factory Methods

Java 9 comes with new factory methods to create collections easily.

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Java9: JavaDocs Tool

JavaDocs tool let’s you create java documentations with no time. Java9 has improved this feature with supporting to…

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Java 8New Features

Java8: Streams

Java 8 introduced a new feature to manage objects in sequential order. This can be considered as a series of objects…

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Java8: New Date Time Package

Java 8 has improved date time implementation by rewriting a new API to avoid some of the drawbacks in the previous…

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Java8: Base64

Java 8 now has inbuilt encoder and decoder for Base64 encoding.

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Java8: Nashorn JavaScript Engine

Nashorn js Engine replaced Rhino in Java 8 to improve performance 2 to 10 times. It directly compiles the code in…

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Java8: Optional Class

Optional class is a Java8 introduction to ease null handling. This is a wrapper class that can be used with object(not…

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Java8: Lambdas & Internal Iterators

Java8 introduced a new type of iterator called internal iterators.

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Java8: Lambdas & Streams

When streams combined with lambdas we can do a lot with very few lines of codes. Let’s try to print below class using…

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Java 8: Default Methods

Default methods are introduced in Java 8 to use with interfaces. This helps older interfaces to support lambda…

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Java8: Lambdas & Method References

Method reference is a shorthand notation of a lambda expression to call a method. str -> System.out.println(str) can be…

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Java8: Closures

In the below code Calculator class implementation will have access to b variable even its not in the scope. This is…

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Functional Interface

Functional interfaces are type of interface which will have one method in it. This can be used with lambdas as…

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Java ThreadLocal

Allows us to store data individually per thread. when we want to use this value from a thread we only need to call a…

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Software Architectural Patterns in a nutshell

An architectural pattern is a general, reusable solution to a commonly occurring problem in software architecture…

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Rainbow Tables In Computing

A rainbow table is a precomputed cache table for the hashing outputs. This is used in cracking passwords.

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Log4j2 Garbage Free Logging

Garbage collection pauses are a common cause of latency spikes and significant effort is spent on controlling these…

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Design Patterns

Java Design Patterns 2021

Design patterns are best practices to general problems that software developers faced during software development…

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Delegate Design Pattern With Lambdas

Let’s see how to implement Delegate design pattern with Java lambdas.

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Strategy Design Pattern with Lambdas

Let’s see how to implement strategy design pattern with Java lambdas.

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Decorator Design Pattern With Lambdas

Today let’s try to implement Decorator design pattern with the help of Java Lambda expressions.

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Java Collection Framework

Java Collection Frameworknuwanzen.medium.com

Java Multi-threading Summary 2021

Thread

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Log4j logging framework

log4j is a reliable, fast and flexible logging framework (APIs) written in Java under the Apache. It offers direct…

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Java Multi-threading 2021

Thread

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Other

Git Incorrect Upstream Branch

Today when I was working with a git had to face a funny situation. I made a local change and then pushed to remote but…

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Docker: Creating MySQL 5.7 Server

Install Docker if you haven’t done by now,

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Linux MINT: SSH Connection Manager

Ásbrú Connection Manager

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Java JMH Benchmark Tool

Benchmarking tool can be used to find for example you have two code implementations and wanna know what is the best…

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Create Java Project From Maven

This how you should be using maven to create a java project from the scratch.

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HTTP keep-alive

HTTP keep-alive is an instruction that allows a single TCP connection to remain open for multiple HTTP…

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Java Streams & Lambdas

Java External & Internal Iterators

Streams and Lambdas

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Parallel Computing With Java Streams

Let’s try to print a list and see how can we use parallel streams in Java streams api.

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Java Reactive Streams

Reactive Streams is an initiative to provide a standard for asynchronous stream processing with non-blocking back…

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Microservices

Micro-services: Saga Design Pattern

The saga design pattern is a way to manage data consistency across software applications in distributed transaction…

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Event Driven Architecture

Event Driven Architecture has a very close relationship to Message Driven Architecture. Let’s compare point to point…

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