Category: Java Programming

Alle Java-Grundlagen, die Sie für Ihren RPi brauchen

Einsatz von Temperatursensoren, Relais, A/D-Wandlern, analogen und digitalen Eingängen und Sensoren

Beispielprojekte aus der Hausautomation: Heizungssteuerung, Zeitschaltuhr, Alarmanlage, Audio- und Lichtsteuerung, Füllstandsanzeige, Daten speichern und visualisieren

Der Raspberry Pi ist ein preiswerter und äußerst energiesparsamer laptop in der Größe einer Kreditkarte. In Kombination mit der Programmiersprache Java bietet er eine hervorragende Umgebung für die schnelle Realisierung technischer Ideen und Projekte.

Dieses Buch vermittelt Ihnen anhand vieler anschaulicher Beispiele genau die Java-Kenntnisse, die auf die des Raspberry Pi und das Linux-Betriebssystem Raspbian zugeschnitten sind.

In jedem Kapitel werden neue Techniken der Java-Programmierung eingeführt, die Sie daraufhin in einem Praxisbeispiel einsetzen:

• Funktionen für Datum und Zeit: Akkus weighted down mit zeitgesteuerten Relais und eine Spiegelreflexkamera steuern
• Digitale Eingänge und Sensoren: Bewegungsmelder, Ultraschallsensor zur Abstandsmessung, Anschluss analoger Sensoren über einen Schmitt-Trigger zur Schwellenwerterkennung
• Analoge Eingänge und Sensoren: Einsatz externer Analog-Digital-Wandler und deren Ansteuerung über den SPI-Bus, Messen von Temperatur und Lichtstärke
• Swing zum Erzeugen grafischer Oberflächen mit Java wie z.B. zum Anzeigen von Messwertdiagrammen
• Messwerte in eine Datei speichern am Beispiel eines Datenloggers
• Threads zur parallelen Verarbeitung von Daten
• Reguläre Ausdrücke für die komplexe Suche von Zeichenketten
• Füllstandsanzeige: Ermitteln des Wasserstandes in einer Zisterne mit einem Distanzsensor und grafische Darstellung als Funktion über die Zeit
• Mit Java einen eigenen http-Server programmieren und diesen für verschiedene Projekte als Webservice einsetzen: Messwerte abfragen, Heizungssteuerung, Zeitschaltuhr mit Autostart
• E-Mails mit Java verarbeiten: Alarmanlage, die durch einen Bewegungsmelder ausgelöst wird und eine e mail verschickt
• Einsatz des I²C-Busses am Beispiel eines Temperatursensors
• Einen Ultraschallsensor über die serielle Schnittstelle RS232 mit dem RPi verbinden
• Textausgabe mit LCD-Displays
• Einsatz der Entwicklungsumgebung BlueJ

Das Buch richtet sich nicht nur an Java-Entwickler, sondern auch an Umsteiger von anderen Programmiersprachen wie C oder Python. Im Anhang finden Java-Einsteiger einen umfangreichen Java-Grundlagenkurs.

This publication is for novices

If you will have by no means performed any programming ahead of - when you are an entire beginner - this booklet is for you. This publication assumes no earlier wisdom of programming. It begins from scratch. it's written in an easy, direct type for optimum readability. it truly is aimed toward first point scholars at universities and faculties, however it can also be compatible for rookies learning alone.

The procedure of this book

We clarify easy methods to use items early during this e-book. Our method is first of all the tips of variables, project and strategies, then introduce using items made out of library periods. subsequent we clarify tips on how to use keep an eye on constructions for choice and looping. Then comes the remedy of ways to jot down your individual periods.

We desired to ensure that the joys section of programming used to be paramount, so we use pix correct from the beginning. we expect images is enjoyable, fascinating and obviously demonstrates the entire vital ideas of programming. yet we have not overlooked courses that enter and output textual content - also they are incorporated.

The courses we current use a number of the good points of a graphical person interfaces (GUIs), corresponding to buttons, scroll bars and textual content containers. yet we additionally clarify tips on how to write console courses in Java.

We introduce new principles rigorously one-at-a-time, instead of without notice. So, for instance, there's a unmarried bankruptcy on writing equipment. We introduce easy rules early and extra subtle rules later on.

Build messaging purposes utilizing the ability of Spring Boot; use Spring program occasions over the internet; use WebSocket, SockJS, and STOMP messaging with Spring MVC; and use Spring JMS, Redis Pub/Sub and Spring AMQP for trustworthy messaging strategies. This publication covers the entire Spring Messaging APIs utilizing Spring Boot. Written through a Pivotal engineer, Spring Boot Messaging is an authoritative consultant to the numerous messaging APIs and the way to exploit those for developing company and integration solutions.

You will study and combine those messaging APIs with extra advanced firm and cloud functions: for instance, one can find the way to use Spring Cloud movement for growing message-driven and cloud local microservices. additionally, you’ll observe the hot Spring Integration DSL and use it with Spring Cloud move to construct integration strategies utilizing each company integration development. ultimately, you’ll see Spring Reactor and Spring Cloud to take your software to the following level.
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After analyzing this ebook, you'll come away with a case learn software walk-through and should have the capacity to use it as a template for development your individual Spring messaging functions or messaging gains inside of your corporation or cloud application.

What you are going to Learn

• Use the most Spring messaging APIs with Spring Framework 5
• Build messaging functions over the Web
• Use WebSocket, SockJS, and STOMP messaging
• Integrate Spring JMS and Spring AMQP into your applications
• Work with Spring Cloud circulate and microservices

Who This ebook Is For

Enterprise Java builders who've no less than a few past adventure with the Spring Framework and/or the Spring platform. 

Key Features

• Master utilizing Docker and Kubernetes to construct, set up and deal with Java functions in a jiff
• Learn how one can create your personal Docker photo and customise your personal cluster utilizing Kubernetes
• Empower the adventure from improvement to creation utilizing this sensible guide.

Book Description

Imagine developing and checking out Java EE functions on Apache Tomcat Server or Wildfly program server in mins in addition to deploying and handling Java purposes speedily. Sounds too strong to be precise? yet you've got a cause to cheer as such situations are just attainable by way of leveraging Docker and Kubernetes.

This booklet will commence through introducing Docker and delve deep into its networking and chronic garage thoughts. you are going to then continue to profit tips on how to refactor monolith software into separate prone by way of development an program after which packaging it into Docker boxes. subsequent, you are going to create a picture containing Java company program and later run it utilizing Docker. relocating on, the ebook will specialize in Kubernetes and its good points and you may discover ways to install a Java software to Kubernetes utilizing Maven and video display a Java software in creation. by means of the top of the e-book, you'll get hands-on with a few extra complicated issues to extra expand your wisdom approximately Docker and Kubernetes.

What you are going to learn

• Package Java purposes into Docker images
• Understand the working of boxes locally
• Explore improvement and deployment ideas with Docker
• Integrate Docker into Maven builds
• Manage and video display Java functions working on Kubernetes clusters
• Create non-stop supply pipelines for Java functions deployed to Kubernetes

About the Author

Jaroslaw Krochmalski is a passionate software program fashion designer and developer who focuses on the monetary company area. He has over 12 years' event in software program improvement. he's a clean-code and software program craftsmanship fanatic. he's a qualified Scrum grasp and keen on Agile. His expert pursuits comprise new applied sciences in internet program improvement, layout styles, firm architectures, and integration patterns.

He has been designing and constructing software program professionally considering 2000 and has been utilizing Java as his fundamental programming language due to the fact that 2002. some time past, he labored for firms comparable to Kredyt financial institution (KBC) and financial institution BPS on many large-scale initiatives corresponding to overseas funds orders, exhibit funds, and assortment platforms. He at present works as a specialist at Danish corporation 7N as an infrastructure architect for the Nykredit financial institution. you could succeed in him through Twitter at @jkroch or via electronic mail at jarek@finsys.pl.

Table of Contents

1. Introduction to Docker
2. Networking and chronic garage
3. Working with microservices
4. Creating Java microservices
5. Creating photographs with Java functions
6. Running packing containers with Java Applications
7. Introduction to Kubernetes
8. Using Kubernetes with Java
9. Working with Kubernetes API
10. Deploying Java on Kubernetes within the Cloud
11. More Resources

Master Oracle Fusion purposes layout and Personalization

Deliver hugely adaptable enterprise purposes that bolster productiveness and force expert decision-making. Oracle Fusion purposes improvement and Extensibility Handbook comprises most sensible practices, real-world case reviews, and technical deep dives. detect the way to deal with layout- and run-time customizations, expand latest UIs and construct new ones, safe your purposes, and combine with different platforms. This Oracle Press advisor deals entire assurance of the newest cloud and SOA-based features.

• Explore Oracle Fusion functions elements and architecture
• Plan, enhance, debug, and installation customizations
• Extend out-of-the-box performance with Oracle JDeveloper
• Modify internet purposes utilizing Oracle Composer
• Incorporate Oracle SOA Suite 11g composites
• Validate code via sandboxes and attempt environments
• Secure info utilizing authorization, authentication, and encryption
• Design and distribute custom-made BI reports
• Automate jobs with Oracle firm Scheduler
• Change visual appeal and branding of your functions with the Oracle ADF epidermis Editor
• Extend and customise CRM with software Composer

Written through top Java specialist, Sam Alapati, and aimed toward rookies to the area of exceptions, assertions and logging, this ebook cuts-to-the-chase in a logical and easy-to-understand demeanour. Get lower than the hood and learn about stating, throwing and catching exceptions; what checked and unchecked exceptions suggest; how to find customized exception sessions; why (and how) you can use assertions; the worth and gear of logging; and masses more!

Even more matured Java builders and directors should still achieve worthwhile details and information from this book.

In the ebook, you will:
- know about the differing kinds of Exception, and the way to accommodate them elegantly
- Dig deep into Exception items and how you can outline customized Exceptions
- observe useful instructions at the powerful use of Exceptions, together with whilst to chain Exceptions
- Sanity fee your software code, utilizing uncomplicated pass/fail statement tests
- become familiar with java.util.logging, Log4J, and different logging frameworks
- choked with plenty of pattern code, tricks, counsel and notes. obtain the code from the publisher's web site for free.

A functional, finished, and elementary method of construction microservices in Spring

About This Book

• Update current functions to combine reactive streams published as part of Spring 5.0
• Learn how one can use Docker and Mesos to push the limits and construct profitable microservices
• Upgrade the aptitude version to enforce scalable microservices

Who This e-book Is For

This ebook is perfect for Spring builders who are looking to construct cloud-ready, Internet-scale purposes, and straightforward RESTful prone to fulfill glossy company demands.

What you are going to Learn

• Familiarize your self with the microservices structure and its benefits
• Find out tips to steer clear of universal demanding situations and pitfalls whereas constructing microservices
• Use Spring Boot and Spring Cloud to enhance microservices
• Handle logging and tracking microservices
• Leverage Reactive Programming in Spring 5.0 to construct sleek cloud local applications
• Manage internet-scale microservices utilizing Docker, Mesos, and Marathon
• Gain insights into the most recent inclusion of Reactive Streams in Spring and make functions extra resilient and scalable

In Detail

The Spring Framework is an program framework and inversion of the keep an eye on box for the Java platform. The framework's middle good points can be utilized by means of any Java software, yet there are extensions to construct net functions on best of the Java EE platform.

This ebook might help you enforce the microservice structure in Spring Framework, Spring Boot, and Spring Cloud. Written to the most recent necessities of Spring that makes a speciality of Reactive Programming, you could construct sleek, internet-scale Java functions very quickly. The ebook starts with directions to enforce responsive microservices at scale. subsequent, you are going to know how Spring Boot is used to set up serverless self sustaining companies via elimination the necessity to have a heavyweight program server.

Later, you will how to move extra by means of deploying your microservices to Docker and dealing with them with Mesos. by means of the tip of the booklet, you've gotten won extra readability at the implementation of microservices utilizing Spring Framework and may manage to use them in internet-scale deployments via real-world examples.

Style and approach

The e-book takes a step by step method on constructing microservices utilizing Spring Framework, Spring Boot, and a collection of Spring Cloud elements that can assist you scale your applications.