Samanta  Moore

Samanta Moore


Complete Guide to Thread Pools in Java

In a single threaded application, only one thread can execute, meaning only one task can run at any point in time.
Consider a web server application where each HTTP request is handled by a separate thread. With a limit on the number of the threads that can be created, the application will not be servicing HTTP requests as quickly as they come in, but it will be servicing them as quickly as the system can sustain.


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Complete Guide to Thread Pools in Java
Tyrique  Littel

Tyrique Littel


How to Install OpenJDK 11 on CentOS 8

What is OpenJDK?

OpenJDk or Open Java Development Kit is a free, open-source framework of the Java Platform, Standard Edition (or Java SE). It contains the virtual machine, the Java Class Library, and the Java compiler. The difference between the Oracle OpenJDK and Oracle JDK is that OpenJDK is a source code reference point for the open-source model. Simultaneously, the Oracle JDK is a continuation or advanced model of the OpenJDK, which is not open source and requires a license to use.

In this article, we will be installing OpenJDK on Centos 8.

#tutorials #alternatives #centos #centos 8 #configuration #dnf #frameworks #java #java development kit #java ee #java environment variables #java framework #java jdk #java jre #java platform #java sdk #java se #jdk #jre #open java development kit #open source #openjdk #openjdk 11 #openjdk 8 #openjdk runtime environment

Samanta  Moore

Samanta Moore


Going Beyond Java 8: Local Variable Type Inference (var) - DZone Java

According to some surveys, such as JetBrains’s great survey, Java 8 is currently the most used version of Java, despite being a 2014 release.

What you are reading is one in a series of articles titled ‘Going beyond Java 8,’ inspired by the contents of my book, Java for Aliens. These articles will guide you step-by-step through the most important features introduced to the language, starting from version 9. The aim is to make you aware of how important it is to move forward from Java 8, explaining the enormous advantages that the latest versions of the language offer.

In this article, we will talk about the most important new feature introduced with Java 10. Officially called local variable type inference, this feature is better known as the **introduction of the word **var. Despite the complicated name, it is actually quite a simple feature to use. However, some observations need to be made before we can see the impact that the introduction of the word var has on other pre-existing characteristics.

#java #java 11 #java 10 #java 12 #var #java 14 #java 13 #java 15 #verbosity

Macey  Legros

Macey Legros


Thread Pools In Java Example | Java Thread Pools Tutorial

It is an exciting topic of Java-related to  multithreading that is to perform multiple tasks at the same time. Database and web servers like Server Programs execute requests from various clients every day and the approach through which we can build new threads whenever a request arrives. But things have a drawback, and its disadvantage is that at every request our server spends too much time and resources also used and as there are too many threads that are actively running this will directly result in memory out of reach. So to overcome this problem, we have to limit the number of threads that are actively running.

Thread Pools In Java

Thread pools in Java reuse previously created threads to execute current tasks and offer a solution to the problem of thread cycle overhead and resource thrashing.

See the following figure.

Thread Pools In Java Example

Now the question in your mind is what thread pools are?

Thread pools are the ones who use the previous threads to perform current tasks through this we can solve our problem of resource thrashing and memory wasting.

It also saves the time of thread creation and hence in this way the response is very nice

Threads are mapped to system-level- threads in Java which are directly refer to operating system resources.

#java #thread pools #java-related

Guide to Understanding Generics in Java


Java is a type-safe programming language. Type safety ensures a layer of validity and robustness in a programming language. It is a key part of Java’s security to ensure that operations done on an object are only performed if the type of the object supports it.

Type safety dramatically reduces the number of programming errors that might occur during runtime, involving all kinds of errors linked to type mismatches. Instead, these types of errors are caught during compile-time which is much better than catching errors during runtime, allowing developers to have less unexpected and unplanned trips to the good old debugger.

Type safety is also interchangeably called strong typing.

Java Generics is a solution designed to reinforce the type safety that Java was designed to have. Generics allow types to be parameterized onto methods and classes and introduces a new layer of abstraction for formal parameters. This will be explained in detail later on.

There are many advantages of using generics in Java. Implementing generics into your code can greatly improve its overall quality by preventing unprecedented runtime errors involving data types and typecasting.

This guide will demonstrate the declaration, implementation, use-cases, and benefits of generics in Java.

#java #guide to understanding generics in java #generics #generics in java #guide to understanding generics in java

Samanta  Moore

Samanta Moore


Threads In Java Part 2

Understand The Creation and Prevention

Following My Previous Blog on Threads in java, Let’s Continue to explore threads deeper by understanding more of their concepts.

How to prevent thread executions

We can prevent thread execution by using the following three methods

  1. yield()
  2. join()
  3. sleep()

1) yield() :-

yield() is present in thread class with the following declaration

Public static native void yield()

If a thread wants to give the change to another waiting thread of the same priority then that thread call yield method,

If a thread is executing and one higher priority thread comes then that executing thread will be stopped and immediately a higher priority thread will get a chance.

#programming #technical #core-java #threads #java #threads in java