Tag: Java

Feed: O'Reilly Media, Inc. Upcoming Titles. Author: O'Reilly Media, Inc.. Reactive systems and event-driven architecture are becoming essential to application design--and companies are taking note. Reactive systems ensure applications are responsive, resilient, and elastic no matter what failures, latency, or other errors may be occurring, while event-driven architecture offers a flexible and composable option for distributed systems. This practical resource helps you bring these approaches together using Quarkus, a Java framework that greatly simplifies the work developers must undertake for cloud deployments. This book covers how Quarkus 2.0 reactive features allow the smooth development of reactive systems.Clement Escoffier and Ken ... Read More

Feed: AWS Compute Blog. Author: James Beswick. This post is written by Mark Sailes, Specialist Solutions Architect, Serverless and Richard Davison, Senior Partner Solutions Architect. The Operating Lambda: Performance optimization blog series covers important topics for developers, architects, and system administrators who are managing applications using AWS Lambda functions. This post explains how you can reduce the initialization time to start a new execution environment when using the Java-managed runtimes. Many Lambda workloads are designed to deliver fast responses to synchronous or asynchronous workloads in a fraction of a second. Examples of these could be public APIs to deliver dynamic ... Read More

Feed: O'Reilly Media, Inc. Upcoming Titles. Author: O'Reilly Media, Inc.. Learning by doing is the best way to grasp new technologies With interactive learning, teams get hands-on experience with tech like Kubernetes, Python, Docker, Java, and more—in safe live dev environments. So they’re more comfortable putting it to work in real-world situations ... Read More

Feed: Planet PostgreSQL. We discussed how to install and create a simple class in the first part of this series where we ran a SELECT and returned one row with one column with a formatted text. Now it’s time to expand and see how to return multiple tuples. A little disclaimer here; I’m not going to comment much on the Java code because this is not intended to be a Java tutorial. The examples here are just for educational purposes, not intended to be of high performance or used in production! Returning a Table Structure This first example will show ... Read More

Feed: Recent Announcements. The Transfer Manager for the Amazon Simple Storage Service (Amazon S3) is now available in the AWS SDK for 2.x as a Preview release. Using S3 Transfer Manager’s simple API, you can now perform high-throughput uploads and downloads of objects to and from Amazon S3 and benefit from the enhanced throughput, performance, and reliability. S3 Transfer Manager is an open-source high level library for the Amazon S3 client that is built on top of the AWS Common Runtime S3 Client and leverages S3 multipart uploads and downloads. S3 Transfer Manager is available in all AWS Regions. To learn about ... Read More

Feed: Recent Announcements. The Amazon DynamoDB Accelerator (DAX) SDK for Java 2.x is now available and is compatible with the AWS SDK for Java 2.x. You can build Java applications with accelerated access to DynamoDB and benefit from non-blocking I/O and other features of the latest AWS SDK for Java. DAX provides a fully managed, highly available, in-memory cache for DynamoDB that can accelerate reads from DynamoDB tables by up to 10 times, even at millions of requests per second. DAX does all the heavy lifting required to add in-memory acceleration to your DynamoDB tables. DAX is API-compatible with DynamoDB, ... Read More

Feed: Neo4j Graph Database Platform. Author: Michael Hunger, Developer Relations. Hello, everyone! Time really flies! It felt like only yesterday I was putting together last week’s twin4j. I encourage you to share both the newsletter and blog with colleagues and friends who may also find it helpful. You can point them to the page with past issues and the sign-up form. And also send us your feedback, either via Twitter or Discord. Please let us know what you like or dislike about twin4j and what you would love to see more of. I’m also really excited to announce that we ... Read More

Feed: Featured Blog Posts - Data Science Central. Author: Riya Thomas. In the history of computing, one revolutionary year was 1995, when JAVA made it to the headlines. Closely following its heels, JavaScript appeared in the same year. Both backend technologies sound more like twins name-wise, however, nothing is as distinct as JAVA and JavaScript. Despite their technical differences, they have somehow managed to collide as tech stacks, all thanks to NodeJS.  Today, enterprises of all scales and sizes prefer to hire NodeJS developers for their projects. You don't believe me? Hear this out. Netflix recently migrated from JAVA to ... Read More

Feed: Recent Announcements. Amazon CodeGuru Reviewer is a developer tool that leverages automated reasoning and machine learning to detect potential defects that are difficult to find in your code and offers suggestions for improvements. Today, we are announcing a new CI/CD experience for CodeGuru Reviewer that allows you to trigger code quality and security analysis as a step within your CI workflow using GitHub Actions. Additionally, we are also introducing 20+ new detectors for CodeGuru Reviewer to help identify security vulnerabilities and check for security best practices in your Java code.   The launch of CI/CD experience for GitHub Actions allows developers ... Read More

Feed: R-bloggers. Author: Di Cook. //=========================================================================#// Financial Econometrics & Derivatives, ML/DL using R, Python, Tensorflow  // by Sang-Heon Lee //// https://kiandlee.blogspot.com//————————————————————————-#// rJava example with built-in R commands//=========================================================================#package aRjava;import org.rosuda.JRI.Rengine;import org.rosuda.JRI.REXP;public class CRjava {    public static void main(String[] args) {        // Launch and Start rJava        Rengine re=new Rengine(new String[] { “–vanilla” }, false, null);        // Input parameters        int nvar = 3;        // R commands through rJava        re.eval(“ma +nvar+“,”+nvar+“),”+nvar+“,”+nvar+“)”);        re.eval(“mb );        re.eval(“eg );        REXP x = re.eval(“eg$vectors”);        // Result : raw output        System.out.println(“Result as a raw output”);        System.out.println(x+“n”);        // R matrix –> Java 2D array        double[][] mout = x.asDoubleMatrix();        System.out.println(“Result as a 2D array”);        for(int i = 0; invar; i++) {            for(int j = 0; jnvar; j++) {                System.out.print(String.format(“%2.5f”, mout[i][j]) + ”   “);            }            System.out.println(“”);        }        // end rJava        re.end();    }} ... Read More