Premium Essay

Event Driven Programming D2

Submitted By
Words 1068
Pages 5
D1-Evaluate the suitability of event driven programs for non-graphical applications

non-graphical applications:
Nowadays most of the devices and latest technology uses event driven, the event means input or output. Event driven programs are very suitable for graphical user interface (GUIs) as they are an excellent match for each other. A GUI presents the user with a variety of graphical choices and menus that can be used with the mouse or keyboard (or other input devices), usually with no set sequence that the user must follow. For example, a computer is programmed to respond to a mouse click, or a keyboard press. When this event (input) happens, an action (output) will occur, for example opening of a window, or text appearing on a word processor. …show more content…
It then identifies what button was pressed and then executes the code associated with that trigger. As the dial moves, it will hit the trigger point which will cause the next action however; the user can stop the process immediately with a certain button (trigger). A washing machine cannot assume because the code means that it will always perform that same things. Event driven programming is good as it site there idle until the event trigger occurs and it is quick to respond to this. Event driven programming is also very simple when it comes to coding as it shows the possible commands for that part of the code, it also allows the user to put a code in without typing which is a lot faster and reduces …show more content…
If the ID card is accepted. The code will be run for the light to change green and for the barrier to open but if the ID card isn’t accepted, then the code will be run for the red light to show and the barriers will not open. An event driven programming here is not really suitable here as it can take a long time for the card to be checked and this can cause long queues of people. Also, people go in and out from the same direction so this can also be a problem as someone may wanting to go out someone may wanting to go in.
Most computers use event driven programs for non-graphical applications. A good example would be when you turn the power on. You don't even have to monitor turned on to have events occurring. When you press the button, there will be either one or two lights come on. The reason it does this is the fact that it shows the user that power is getting through the power supply unit and getting to the rest of the components in the computer. Also during this step you will be able to hear that power is getting through because you should be able to hear the fan start

Similar Documents

Free Essay

Sales and Inventory System

...side of the screen you can see the toolbox (if this doesn't show up go to the top menu bar and select View -> Toolbox). In this toolbox you will see a picture of a button. Double click the button icon and it will create a Command1 CommandButton in the center of your form.    If you run the program now (Press F5) you will see your window now has a button labeled Command1 in the center of it, but if you click the button it doesn't do anything. So lets wire things up so our program will say "Hello, World" when you click the button. Close out of your running program so you are back to the main design environment (pictured above) Visual Basic allows you to do event driven programming. This is a concept that is very powerful and easy to use. Event driven programming works as follows: Visual Basic has many different events defined that...

Words: 628 - Pages: 3

Free Essay

Life, Death, and the Critical Transistion

...Life, Death, and the Critical Transition: Finding Liveness Bugs in Systems Code Charles Killian, James W. Anderson, Ranjit Jhala, and Amin Vahdat University of California San Diego {ckillian,jwanderson,jhala,vahdat}@cs.ucsd.edu Abstract finding bugs with model checking currently requires the programmer to have intimate knowledge of the low-level Modern software model checkers find safety violations: actions or conditions that could result in system failure. breaches where the system has entered some bad state. For We contend that for complex systems the desirable bemany environments however, particularly complex con- haviors of the system may be specified more easily than current and distributed systems, we argue that liveness identifying everything that could go wrong. Of course, properties are both more natural to specify and more im- specifying both desirable conditions and safety assertions portant to check. Liveness conditions specify desirable is valuable; however, current model checkers do not have system conditions in the limit, with the expectation that any mechanism for verifying whether desirable system they will be temporarily violated, perhaps as a result of properties can be achieved. Examples of such properties failure or during system initialization. include: i) a reliable transport eventually delivers all mesExisting software model checkers cannot verify live- sages even in the face of network losses and delays, ii) all ness because doing so...

Words: 19579 - Pages: 79

Free Essay

Software

...Ariel M. Vasquez November 24, 2014 CIS331 System Modeling Theory Professor Randy Arvay Software System Architecture For this case the question is asked which system would be best to implement for this case. There are several different types of cases to chose from. They all with their own particular benefits and negatives at the same time The one that fits this needs in particular would be the event driven system. What is an event driven architecture system? An event driven architecture, or EDA for short, is a pattern that focuses on promoting production, detection, and consumption. Most of its works occur during an event. In the medical field, which this case revolves around, have thing change a lot during the course of not only a day even within every hour this change. Whether it's from a patient's medical records, stock of inventory, medicines provided to a patient, and even when a patient enters and exits the hospital. With a system like EDA thing will only occur when things change and this pattern seems to be able to handle those changes better than the others. The following image will show basically how this type of system will work. A system that integrates EDA may also provide a higher level of service to help with the implementation of EDA. Things like security, reliable messaging, content based routing, and mapping and transformation. The security that this provides is message encryption, authentication, and access control. With the messaging this provides...

Words: 418 - Pages: 2

Free Essay

Ssss

...Tutorial: XML programming in Java Doug Tidwell Cyber Evangelist, developerWorks XML Team September 1999 About this tutorial Our first tutorial, “Introduction to XML,” discussed the basics of XML and demonstrated its potential to revolutionize the Web. This tutorial shows you how to use an XML parser and other tools to create, process, and manipulate XML documents. Best of all, every tool discussed here is freely available at IBM’s alphaWorks site (www.alphaworks.ibm.com) and other places on the Web. About the author Doug Tidwell is a Senior Programmer at IBM. He has well over a seventh of a century of programming experience and has been working with XML-like applications for several years. His job as a Cyber Evangelist is basically to look busy, and to help customers evaluate and implement XML technology. Using a specially designed pair of zircon-encrusted tweezers, he holds a Masters Degree in Computer Science from Vanderbilt University and a Bachelors Degree in English from the University of Georgia. 1 Section 1 – Introduction Tutorial – XML Programming in Java Section 1 – Introduction About this tutorial Our previous tutorial discussed the basics of XML and demonstrated its potential to revolutionize the Web. In this tutorial, we’ll discuss how to use an XML parser to: • • • Process an XML document Create an XML document Manipulate an XML document We’ll also talk about some useful, lesser-known features of XML parsers. Best of all, every tool discussed here is freely...

Words: 13605 - Pages: 55

Free Essay

Java Basics

...1 Learn Java/J2EE core concepts and key areas With Java/J2EE Job Interview Companion By K.Arulkumaran & A.Sivayini Technical Reviewers Craig Malone Stuart Watson Arulazi Dhesiaseelan Lara D’Albreo Cover Design, Layout, & Editing A.Sivayini Acknowledgements A. Sivayini Mr. & Mrs. R. Kumaraswamipillai 2 Java/J2EE Job Interview Companion Copy Right 2005-2007 ISBN 978-1-4116-6824-9 The author has made every effort in the preparation of this book to ensure the accuracy of the information. However, information in this book is sold without warranty either expressed or implied. The author will not be held liable for any damages caused or alleged to be caused either directly or indirectly by this book. Please e-mail feedback & corrections (technical, grammatical and/or spelling) to java-interview@hotmail.com First Edition (220+ Q&A): Dec 2005 Second Edition (400+ Q&A): March 2007 3 Outline SECTION DESCRIPTION What this book will do for you? Motivation for this book Key Areas index SECTION 1 Interview questions and answers on: Java Fundamentals Swing Applet Performance and Memory issues Personal and Behavioral/Situational Behaving right in an interview Key Points SECTION 2 Interview questions and answers on: Enterprise Java J2EE Overview Servlet JSP JDBC / JTA JNDI / LDAP RMI EJB JMS XML SQL, Database, and O/R mapping RUP & UML Struts Web and Application servers. Best practices and performance considerations. Testing and deployment. Personal and...

Words: 23255 - Pages: 94

Premium Essay

Analysis

...SEVENTH EDITION PROBLEM SOLVING AND PROGRAM DESIGN in C This page intentionally left blank SEVENTH EDITION PROBLEM SOLVING AND PROGRAM DESIGN in C Jeri R. Hanly, University of Wyoming Elliot B. Koffman, Temple University Boston Columbus Indianapolis New York San Francisco Upper Saddle River Amsterdam Cape Town Dubai London Madrid Milan Munich Paris Montreal Toronto Delhi Mexico City Sao Paulo Sydney Hong Kong Seoul Singapore Taipei Tokyo Editorial Director, ECS: Marcia Horton Editor-in-Chief: Michael Hirsch Senior Project Manager: Carole Snyder Director of Marketing: Patrice Jones Marketing Manager: Yezan Alayan Senior Marketing Coordinator: Kathryn Ferranti Director of Production: Vince O’Brien Managing Editor: Jeff Holcomb Associate Managing Editor: Robert Engelhardt Production Manager: Pat Brown Creative Director: Jayne Conte Designer: Suzanne Behnke Media Editor: Daniel Sandin Media Project Manager: John Cassar Cover Image: (c) michael Holcomb/Shutterstock.com Full-Service Project Management: Mohinder Singh/ Aptara®, Inc. Composition: Aptara®, Inc. Printer/Binder: Edwards Brothers Cover Printer: Lehigh-Phoenix Credits and acknowledgments borrowed from other sources and reproduced, with permission, in this textbook appear on appropriate page within text. Photo Credits: Page 4: Fig. 0.1: akg-images/Paul Almasy/Newscom. Page 11: Fig. 0.4: © 2008 IEEE/Journal of Microelectromechanical Systems (2006). Page 15:...

Words: 158087 - Pages: 633

Premium Essay

Clean Code

...Clean Code Robert C. Martin Series The mission of this series is to improve the state of the art of software craftsmanship. The books in this series are technical, pragmatic, and substantial. The authors are highly experienced craftsmen and professionals dedicated to writing about what actually works in practice, as opposed to what might work in theory. You will read about what the author has done, not what he thinks you should do. If the book is about programming, there will be lots of code. If the book is about managing, there will be lots of case studies from real projects. These are the books that all serious practitioners will have on their bookshelves. These are the books that will be remembered for making a difference and for guiding professionals to become true craftsman. Managing Agile Projects Sanjiv Augustine Agile Estimating and Planning Mike Cohn Working Effectively with Legacy Code Michael C. Feathers Agile Java™: Crafting Code with Test-Driven Development Jeff Langr Agile Principles, Patterns, and Practices in C# Robert C. Martin and Micah Martin Agile Software Development: Principles, Patterns, and Practices Robert C. Martin Clean Code: A Handbook of Agile Software Craftsmanship Robert C. Martin UML For Java™ Programmers Robert C. Martin Fit for Developing Software: Framework for Integrated Tests Rick Mugridge and Ward Cunningham Agile Software Development with SCRUM Ken Schwaber and Mike Beedle Extreme Software Engineering: A Hands on Approach Daniel H. Steinberg...

Words: 20864 - Pages: 84

Premium Essay

Acer America

...Fourth Edition, last update November 01, 2007 2 Lessons In Electric Circuits, Volume IV – Digital By Tony R. Kuphaldt Fourth Edition, last update November 01, 2007 i c 2000-2010, Tony R. Kuphaldt This book is published under the terms and conditions of the Design Science License. These terms and conditions allow for free copying, distribution, and/or modification of this document by the general public. The full Design Science License text is included in the last chapter. As an open and collaboratively developed text, this book is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the Design Science License for more details. Available in its entirety as part of the Open Book Project collection at: www.ibiblio.org/obp/electricCircuits PRINTING HISTORY • First Edition: Printed in June of 2000. Plain-ASCII illustrations for universal computer readability. • Second Edition: Printed in September of 2000. Illustrations reworked in standard graphic (eps and jpeg) format. Source files translated to Texinfo format for easy online and printed publication. • Third Edition: Printed in February 2001. Source files translated to SubML format. SubML is a simple markup language designed to easily convert to other markups like A LTEX, HTML, or DocBook using nothing but search-and-replace substitutions. • Fourth Edition: Printed in March 2002. Additions...

Words: 29763 - Pages: 120

Premium Essay

Electronics

...ABSTRACT Bus service is the main mode of transportation in Chennai. By this service, public are able to travel to anywhere and any places in Chennai. This leads to increase in bus routes which cause confusion to bus users. Although, at present, many routing information systems have been implemented but none of them provide the passenger travel information that they require. As a consequence of the shortages of such significant information, the current bus information services cannot fulfil users need. Current bus information services are based on GPS and operated in licensed frequency band which requires a high implementation and operation cost, these systems are used to provide travel-time approximation only. This paper proposes a system, Real Time Empirical System of Bus Service that can provide valuable information not only bus routes, also provides information of buses based on destination to the passengers. This system is aimed to reduce the operative cost of the existing system. The implementation of Real Time Empirical System of Bus Service involves use of Zigbee and RFID communication technology. This system is operated in 2.4GHz which is ISM band and no external network backbone is required for transmission and reception. iii TABLE OF CONTENTS CHAPTER N o. TITLE ABSTRACT LIST OF FIGURES LIST OF ABBREVIATIONS 1. INTRODUCTION 1.1 EXISTING SYSTEM 1.2 DRAW BACKS IN EXISTING SYSTEM 1.3 PURPOSE OF THIS PROJECT 1.4 BENEFITS OF THE PROJECT 2. REAL TIME EMPIRICAL SYSTEM...

Words: 8763 - Pages: 36

Premium Essay

Cd Key

...Java Quick Reference Console Input Scanner input = new Scanner(System.in); int intValue = input.nextInt(); long longValue = input.nextLong(); double doubleValue = input.nextDouble(); float floatValue = input.nextFloat(); String string = input.next(); Console Output System.out.println(anyValue); JOptionPane.showMessageDialog(null, "Enter input"); GUI Input Dialog String string = JOptionPane.showInputDialog( "Enter input"); int intValue = Integer.parseInt(string); double doubleValue = Double.parseDouble(string); Message Dialog Primitive Data Types byte short int long float double char boolean 8 bits 16 bits 32 bits 64 bits 32 bits 64 bits 16 bits true/false Arithmetic Operators + * / % ++var --var var++ var-addition subtraction multiplication division remainder preincrement predecrement postincrement postdecrement Assignment Operators = += -= *= /= %= assignment addition assignment subtraction assignment multiplication assignment division assignment remainder assignment Relational Operators < >= == != less than less than or equal to greater than greater than or equal to equal to not equal Logical Operators && || ! ^ short circuit AND short circuit OR NOT exclusive OR if Statements if (condition) { statements; } if (condition) { statements; } else { statements; } if (condition1) { statements; } else if (condition2) { statements; } else { statements; } switch Statements switch (intExpression) { case value1: statements; break; ... case valuen: statements; break;...

Words: 73366 - Pages: 294

Premium Essay

Scp and Sap Apo

...Supply Chain Management and Advanced Planning Hartmut Stadtler ´ Christoph Kilger (Eds.) Supply Chain Management and Advanced Planning Concepts, Models, Software and Case Studies Third Edition With 173 Figures and 56 Tables 12 Professor Dr. Hartmut Stadtler FG Produktion und Supply Chain Management FB Rechts- und Wirtschaftswissenschaften TU Darmstadt Hochschulstraûe 1 64289 Darmstadt Germany stadtler@bwl.tu-darmstadt.de Dr. Christoph Kilger j&m Management Consulting AG Kaiserringforum Willy-Brandt-Platz 5 68161 Mannheim Germany christoph.kilger@jnm.de Cataloging-in-Publication Data Library of Congress Control Number: 2004110194 ISBN 3-540-22065-8 Springer Berlin Heidelberg New York ISBN 3-540-43450-X 2nd edition Springer Berlin Heidelberg New York This work is subject to copyright. All rights are reserved, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilm or in any other way, and storage in data banks. Duplication of this publication or parts thereof is permitted only under the provisions of the German Copyright Law of September 9, 1965, in its current version, and permission for use must always be obtained from Springer-Verlag. Violations are liable for prosecution under the German Copyright Law. Springer is a part of Springer Science+Business Media springeronline.com ° Springer Berlin ´ Heidelberg 2000, 2002, 2005 Printed...

Words: 180845 - Pages: 724

Free Essay

Management Concept

...Software Engineering: A Practitioner's Approach Copyright © 1996, 2001 R.S. Pressman & Associates, Inc. For University Use Only May be reproduced ONLY for student use at the university level When used in conjunction with Software Engineering: A Practitioner's Approach. Any other reproduction or use is expressly prohibited. Chapter 1 The Product CHAPTER OVERVIEW AND COMMENTS The goal of this chapter is to introduce the notion of software as a product designed and built by software engineers. Software is important because it is used by a great many people in society. Software engineers have a moral and ethical responsibility to ensure that the software they design does no serious harm to any people. Software engineers tend to be concerned with the technical elegance of their software products. Customers tend to be concerned only with whether or not a software product meets their needs and is easy to use. 1.1 The Evolving Role of Software The main point of this section is that the primary purpose of software is that of information transformer. Software is used to produce, manage, acquire, modify, display, and transmit information anywhere in the world. The days of the lone programmer are gone. Modern software is developed by teams of software specialists. Yet, the software developer's concerns have remained the same. Why does software take so long to complete? Why does it cost so much to produce? Why can't all errors be found and removed...

Words: 43682 - Pages: 175

Free Essay

Student

...WIRELESS SENSOR NETWORK COVERAGE: DEMONSTARTING POWER SAVINGS AND LIMITATIONS WITH MINIMIZED COVERAGE BY SIDNEY I. RUBEY A thesis submitted to the Graduate faculty of the University of Colorado at Colorado Springs in partial fulfillment of the requirements for the degree of Master of Science Department of Computer Science 2011 This thesis for Master of Science degree by Sidney I. Rubey has been approved for the Department of Computer Science by ------------------------------------------------------------------------ Dr. C. Edward Chow, Chair ------------------------------------------------------------------------ Dr. Terrance E. Boult ------------------------------------------------------------------------ Dr. Xiaobo Zhou ----------------------------------------- Date Abstract This paper explores the competing issues of coverage efficiency and power available in wireless sensor networks. Specifically, a shortest distance routing protocol is implemented, and total network system lifetimes are determined using a variety of small percentages of the available system nodes. Using a network simulator developed in Java, wireless sensor nodes are simulated, and power consumption algorithms are included in each node that take into consideration all aspects of power consumption in the operation of the node. Simulating different coverage schemes on the same network system, same initial power sources, and routing protocol, an increase of overall system lifetime of 900% is demonstrated...

Words: 15836 - Pages: 64

Free Essay

Micro

...INTEGRATED CIRCUITS 80C31/80C32 80C51 8-bit microcontroller family 128/256 byte RAM ROMless low voltage (2.7 V–5.5 V), low power, high speed (33 MHz) Product specification IC28 Data Handbook 2000 Aug 07 Philips Semiconductors Philips Semiconductors Product specification 80C51 8-bit microcontroller family 128/256 byte RAM ROMless low voltage (2.7V–5.5V), low power, high speed (33 MHz) 80C31/80C32 DESCRIPTION The Philips 80C31/32 is a high-performance static 80C51 design fabricated with Philips high-density CMOS technology with operation from 2.7 V to 5.5 V. The 80C31/32 ROMless devices contain a 128 × 8 RAM/256 × 8 RAM, 32 I/O lines, three 16-bit counter/timers, a six-source, four-priority level nested interrupt structure, a serial I/O port for either multi-processor communications, I/O expansion or full duplex UART, and on-chip oscillator and clock circuits. In addition, the device is a low power static design which offers a wide range of operating frequencies down to zero. Two software selectable modes of power reduction—idle mode and power-down mode are available. The idle mode freezes the CPU while allowing the RAM, timers, serial port, and interrupt system to continue functioning. The power-down mode saves the RAM contents but freezes the oscillator, causing all other chip functions to be inoperative. Since the design is static, the clock can be stopped without loss of user data and then the execution resumed from the point the clock was stopped. ...

Words: 12804 - Pages: 52

Free Essay

Gfs Using Soap

...performance to a large number of clients. While sharing many of the same goals as previous distributed file systems, our design has been driven by observations of our application workloads and technological environment, both current and anticipated, that reflect a marked departure from some earlier file system assumptions. This has led us to reexamine traditional choices and explore radically different design points. The file system has successfully met our storage needs. It is widely deployed within Google as the storage platform for the generation and processing of data used by our service as well as research and development efforts that require large data sets. The largest cluster to date provides hundreds of terabytes of storage across thousands of disks on over a thousand machines, and it is concurrently accessed by hundreds of clients. In this paper, we present file system interface extensions designed to support distributed applications, discuss many aspects of our design, and report measurements from both micro-benchmarks and real world use. We have designed and implemented the Google File System (GFS) to meet the rapidly growing demands of Google’s data processing needs. GFS shares many of the same goals as previous distributed file systems such as performance, scalability, reliability, and availability. However, its design has been driven by key observations of our application workloads and technological environment, both current and anticipated, that reflect a marked...

Words: 14789 - Pages: 60