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  • Is there a canonical book for learning Java as an experienced developer?

    - by Steven Elliott Jr
    I have been a .NET developer now for about the past 5/6 years give or take. I have never done any professional Java development and the last time I really touched it was probably back in college. I have been toying with the Scala language a little bit but nothing serious. Recently, I've been offered an opportunity to do some pretty cool work, but using Java instead of .NET. I think I can get by alright with my current skill set, meaning I already know how to program well and am familiar with languages such as C# and C++, etc. So, the syntax and all that language stuff are really not a problem. What I need is a really good reference book and a book about how to think in Java. Each language/Framework/Stack tries to address things a certain way and I'm sure Java is no different. What are some great Java books that you simply can't live without? Are there any books that talk about the most important parts of Java that must be understood before all else? As a side note, I will be doing mostly Java web development. Not really 100% on what types of stuff they are using for persistence, framework, server, etc.

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  • EBS 11i and 12.1 Support Timeline Changes

    - by Steven Chan (Oracle Development)
    Two important changes to the Oracle Lifetime Support policies for Oracle E-Business Suite were announced at OpenWorld last week.  These changes affect EBS Releases 11i and 12.1. The changes are detailed in this My Oracle Support document: E-Business Suite 11.5.10 Sustaining Support Exception & 12.1 Extended Support Now to Dec. 2018 (Note 1495337.1) 1. Changes for EBS 11i Sustaining Support The first change is that  we will be providing an exception for the first 13 months of Sustaining Support on Oracle E-Business Suite Release 11.5.10 (11i10), valid from December 1, 2013 – December 31, 2014. This exception support will be comprised of three components: New fixes for Severity 1 production issues United States Form 1099 2013 year-end updates Payroll regulatory updates for the United States, Canada, United Kingdom, and Australia for fiscal years ending in 2014 Customers environments must have the minimum baseline patches (or above) for new Severity 1 production bug fixes as documented here: Patch Requirements for Extended Support of Oracle E-Business Suite Release 11.5.10 (Note 883202.1) 2. Changes for EBS 12.1 Extended Support More time:  Extended Support period for E-Business Suite Release 12.1 has been extended by nineteen months through December, 2018. Customers with an active Oracle Premier Support for Software contract will automatically be entitled to Extended Support for E-Business Suite 12.1. Fees waived:  Uplift fees are waived for all years of Extended Support (June, 2014 – December. 2018) for customers with an active Oracle Premier Support for Software contract. During this period, customers will receive all of the components of Extended Support at no additional cost other than their fees for Software Update License & Support. Where can I learn more? There are two interlocking policies that affect the E-Business Suite:  Oracle's Lifetime Support policies for each EBS release (timelines which were updated by this announcement), and the Error Correction Support policies (which state the minimum baselines for new patches). For more information about how these policies interact, see: Understanding Support Windows for E-Business Suite Releases What about E-Business Suite technology stack components?Things get more complicated when one considers individual techstack components such as Oracle Forms or the Oracle Database.  To learn more about the interlocking EBS+techstack component support windows, see these two articles: On Apps Tier Patching and Support: A Primer for E-Business Suite Users On Database Patching and Support: A Primer for E-Business Suite Users Related Articles Extended Support Fees Waived for E-Business Suite 11i and 12.0 EBS 12.0 Minimum Requirements for Extended Support Finalized

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  • Thought Oracle Usability Advisory Board Was Stuffy? Wrong. Justification for Attending OUAB: ROI

    - by ultan o'broin
    Looking for reasons tell your boss why your organization needs to join the Oracle Usability Advisory Board or why you need approval to attend one of its meetings (see the requirements)? Try phrases such as "Continued Return on Investment (ROI)", "Increased Productivity" or "Happy Workers". With OUAB your participation is about realizing and sustaining ROI across the entire applications life-cycle from input to designs to implementation choices and integration, usage and performance and on measuring and improving the onboarding and support experience. If you think this is a boring meeting of middle-aged people sitting around moaning about customizing desktop forms and why the BlackBerry is here to stay, think again! How about this for a rich agenda, all designed to engage the audience in a thought-provoking and feedback-illiciting day of swirling interactions, contextual usage, global delivery, mobility, consumerizationm, gamification and tailoring your implementation to reflect real users doing real work in real environments.  Foldable, rollable ereader devices provide a newspaper-like UK for electronic news. Or a way to wrap silicon chips, perhaps. Explored at the OUAB Europe Meeting (photograph from Terrace Restaurant in TVP. Nom.) At the 7 December 2012 OUAB Europe meeting in Oracle Thames Valley Park, UK, Oracle partners and customers stepped up to the mic and PPT decks with a range of facts and examples to astound any UX conference C-level sceptic. Over the course of the day we covered much ground, but it was all related in a contextual, flexibile, simplication, engagement way aout delivering results for business: that means solving problems. This means being about the user and their tasks and how to make design and technology transforms work into a productive activity that users and bean counters will be excited by. The sessions really gelled for me: 1. Mobile design patterns and the powerful propositions for customers and partners offered by using the design guidance with Oracle ADF Mobile. Customers' and partners' developers existing ADF developers are now productive, efficient ADF Mobile developers applying proven UX guidance using ADF Mobile components and other Oracle Fusion Middleware in the development toolkit. You can find the Mobile UX Design Patterns and Guidance on Building Mobile Apps on OTN. 2. Oracle Voice and Apps. How this medium offers so much potentual in the enterprise and offers a window in Fusion Apps cloud webservices, Oracle RightNow NLP and Nuance technology. Exciting stuff, demoed live on a mobile phone. Stay tuned for more features and modalities and how you can tailor your own apps experience.  3. Oracle RightNow Natural Language Processing (NLP) Virtual Assistant technology (Ella): how contextual intervention and learning from users sessions delivers a great personalized UX for users interacting with Ella, a fifth generation VA to solve problems and seek knowledge. 4. BYOD Keynote: A balanced keynote address contrasting Fujitsu's explaining of the conceprt, challenges, and trends and setting the expectation that BYOD must be embraced in a flexible way,  with the resolute, crafted high security enterprise requirements that nuancing the BYOD concept and proposals with the realities of their world of water tight information and device sharing policies. Fascinating stuff, as well providing anecdotes to make us thing about out own DYOD Deployments. One size does not fit all. 5. Icon Cultural Surveys Results and Insights Arising: Ever wondered about the cultural appropriateness of icons used in software UIs and how these icons assessed for global use? Or considered that social media "Like" icons might be  unacceptable hand gestures in culture or enterprise? Or do the old world icons like Save floppy disk icons still find acceptable? Well the survey results told you. Challenges must be tested, over time, and context of use is critical now, including external factors such as the internet and social media adoption. Indeed the fears about global rejection of the face and hand icons was not borne out, and some of the more anachronistic icons (checkbooks, microphones, real-to-real tape decks, 3.5" floppies for "save") have become accepted metaphors for current actions. More importantly the findings brought into focus the reason for OUAB - engage with and illicit feedback though working groups before we build anything. 6. EReaders and Oracle iBook: What is the uptake and trends of ereaders? And how about a demo of an iBook with enterprise apps content?  Well received by the audience, the session included a live running poll of ereader usage. 7. Gamification Design Jam: Fun, hands on event for teams of Oracle staff, partners and customers, actually building gamified flows, a practice that can be applied right away by customers and partners.  8. UX Direct: A new offering of usability best practices, coming to an external website for you in 2013. FInd a real user, observe their tasks, design and approve, build and measure. Simple stuff to improve apps implications no end. 9. FUSE (an internal term only, basically Fusion Simplified Experience): demo of the new Face of Fusion Applications: inherently mobile, simple to use, social, personalizable and FAST, three great demos from the HCM, CRM and ICT world on how these UX designs can be used in different ways. So, a powerful breadth and depth of UX solutions and opporunities for customers and partners to engage with and explore how they can make their users happy and benefit their business reaping continued ROI from those apps investments. Find out more about the OUAB and how to get involved here ... 

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  • JavaOne+Oracle Develop or OOW? - You don't need to choose

    - by shay.shmeltzer
    So you went to the JavaOne/Oracle Develop registration and noticed that this pass doesn't include entry to the Oracle OpenWorld (OOW) sessions. Then you looked at the OOW pass and noticed this one doesn't include access to Oracle Develop and JavaOne. What's up with this? What if you want to see session in all of the above? Well turns out you don't need to pay for two complete passes (each around $2,000) - if you actually choose OOW registration and go through the registration steps - after you finish inserting your personal info you'll get a chance to extend your OOW pass to include Oracle Develop and JavaOne for only an additional $100. Cool! Extra bonus this year - even if you are just getting the JavaOne/Oracle Develop pass you get to go to the Wednesday night party with the big rock shows.

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  • Java keyboard input [on hold]

    - by dØd
    I'm trying to implement a input system that can detect whether a certain key was held or was only pressed briefly. So far I have this: KEY_INTERACTION_TRESHOLD = 400ms //inside a constructor shouldMeasure = true; @Override public void keyPressed(KeyEvent e) { if (shouldMeasure) { startTime = System.currentTimeMillis(); shouldMeasure = false; return; } System.out.println("Button is held down"); e.consume(); } @Override public void keyReleased(KeyEvent e) { if (System.currentTimeMillis() - startTime < KEY_INTERACTION_TRESHOLD) { System.out.println("Button was only pressed briefly"); } startTime = 0; shouldMeasure = true; e.consume(); } Now this works, but the problem is that there is this delay between when I press a key to hold and when the message 'Button is held down' gets displayed. I understand why this delay occurs (for example when you press and hold a letter there will be a similar delay between the first and the second letter printed out), but I would like to somehow avoid it. I'm using only the Java API.

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  • A brief note for customers running SOA Suite on AIX platforms

    - by christian
    When running Oracle SOA Suite with IBM JVMs on the AIX platform, we have seen performance slowdowns and/or memory leaks. On occasion, we have even encountered some OutOfMemoryError conditions and the concomittant Java coredump. If you are experiencing this issue, the resolution may be to configure -Dsun.reflect.inflationThreshold=0 in your JVM startup parameters. https://www.ibm.com/developerworks/java/library/j-nativememory-aix/ contains a detailed discussion of the IBM AIX JVM memory model, but I will summarize my interpretation and understanding of it in the context of SOA Suite, below. Java ClassLoaders on IBM JVMs are allocated a native memory area into which they are anticipated to map such things as jars loaded from the filesystem. This is an excellent memory optimization, as the file can be loaded into memory once and then shared amongst many JVMs on the same host, allowing for excellent horizontal scalability on AIX hosts. However, Java ClassLoaders are not used exclusively for loading files from disk. A performance optimization by the Oracle Java language developers enables reflectively accessed data to optimize from a JNI call into Java bytecodes which are then amenable to hotspot optimizations, amongst other things. This performance optimization is called inflation, and it is executed by generating a sun.reflect.DelegatingClassLoader instance dynamically to inject the Java bytecode into the virtual machine. It is generally considered an excellent optimization. However, it interacts very negatively with the native memory area allocated by the IBM JVM, effectively locking out memory that could otherwise be used by the Java process. SOA Suite and WebLogic are both very large users of reflection code. They reflectively use many code paths in their operation, generating lots of DelegatingClassLoaders in normal operation. The IBM JVM slowdown and subsequent OutOfMemoryError are as a direct result of the Java memory consumed by the DelegatingClassLoader instances generated by SOA Suite and WebLogic. Java garbage collection runs more frequently to try and keep memory available, until it can no longer do so and throws OutOfMemoryError. The setting sun.reflect.inflationThreshold=0 disables this optimization entirely, never allowing the JVM to generate the optimized reflection code. IBM JVMs are susceptible to this issue primarily because all Java ClassLoaders have this native memory allocation, which is shared with the regular Java heap. Oracle JVMs don't automatically give all ClassLoaders a native memory area, and my understanding is that jar files are never mapped completely from shared memory in the same way as IBM does it. This results in different behaviour characteristics on IBM vs Oracle JVMs.

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  • Can Simple & Modern UX Be Sexy? Fusion Apps in 100% #Oracle #ADF Shows How #usableapps #UX #futureofwork

    - by ultan o'broin
    YES! I love the sheer cut-to-the-chase instant beauty and usefulness of my Clear app on iOS. Dropbox really does simplify my ICT world, if not my life. I use those apps every day: on mobile, desktop or web. Clear app Dropbox web UI In the enterprise apps world, you'll love what Oracle Applications User Experience team is doing with our roadmap to simple and modern user experience with Oracle Fusion Applications built with 100% Oracle Application Development Framework (ADF). Simple and modern. A compelling and easily personalized UX for Fusion Apps on your device of choice. Beautiful. Simplicity, it's all part of the BYOD and COIT phenomenon that enterprises need to embrace rather than tolerate or ignore. So, introduce yourself to the new face of Oracle Fusion Applications. More on the Voice of User Experience for Oracle Applications blog.

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  • Implementing Circle Physics in Java

    - by Shijima
    I am working on a simple physics based game where 2 balls bounce off each other. I am following a tutorial, 2-Dimensional Elastic Collisions Without Trigonometry, for the collision reactions. I am using Vector2 from the LIBGDX library to handle vectors. I am a bit confused on how to implement step 6 in Java from the tutorial. Below is my current code, please note that the code strictly follows the tutorial and there are redundant pieces of code which I plan to refactor later. Note: refrences to this refer to ball 1, and ball refers to ball 2. /* * Step 1 * * Find the Normal, Unit Normal and Unit Tangential vectors */ Vector2 n = new Vector2(this.position[0] - ball.position[0], this.position[1] - ball.position[1]); Vector2 un = n.normalize(); Vector2 ut = new Vector2(-un.y, un.x); /* * Step 2 * * Create the initial (before collision) velocity vectors */ Vector2 v1 = this.velocity; Vector2 v2 = ball.velocity; /* * Step 3 * * Resolve the velocity vectors into normal and tangential components */ float v1n = un.dot(v1); float v1t = ut.dot(v1); float v2n = un.dot(v2); float v2t = ut.dot(v2); /* * Step 4 * * Find the new tangential Velocities after collision */ float v1tPrime = v1t; float v2tPrime = v2t; /* * Step 5 * * Find the new normal velocities */ float v1nPrime = v1n * (this.mass - ball.mass) + (2 * ball.mass * v2n) / (this.mass + ball.mass); float v2nPrime = v2n * (ball.mass - this.mass) + (2 * this.mass * v1n) / (this.mass + ball.mass); /* * Step 6 * * Convert the scalar normal and tangential velocities into vectors??? */

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  • Would a typical corporate firewall block a Java applet having the following behaviour

    - by auser
    I'm thinking of developing a proxy-like program to forward ports on a remote PC to a local PC (for example SSH). Assume that both local and remote PCs are running behind typical firewalls (i.e. consumer broadband router firewall, Windows firewall or corporate firewalls). The program will be a Java program which the user will run on both the remote and local PC. The remote client will periodically poll a central server to determine whether there are pending client connections. A session could be initiated as follows: The local client contacts the central server and request the current connection details for a specific remote client. The central server responds with the remote server's last received IP address and port. The next time the remote server polls the central server, the client's IP address and port are returned. The remote server initiates a connection to the local client using the IP address and port returned by the central server and listens for a response on a random port. The remote server will pass the value of the port it's listening on to central server. Goto 1, if client fails to connect to server. Would this work or will a typical firewall block the interactions.

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  • Welcome to the new Oracle Supply Chain Management Blog!

    - by [email protected]
    Welcome to the new Oracle Supply Chain Management Blog!  We will use this blog to share ideas, trends and interesting topics in supply chain management.  Here you'll find blogs about thought leadership, upcoming events (both Oracle and third-party), supply chain best practices, customer and partner innovations and successes and more.   We will cover all areas of the supply chain including Planning, Manufacturing, Supply Management, Logistics and Distribution and Service.  We hope that you will find the blogs and topics interesting and stimulating and we welcome your feedback.  Happy reading and blogging!

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  • The Future of the Database Begins Soon: Oracle Database In-Memory launch, 2014. június 10-ikén

    - by user645740
    Az Oracle adatbázis-kezelo történetében forradalmi újdonságot várunk. A Database In Memory-ról az OpenWorld-ön beszélt eloször nyilvánosan Larry Ellison. A launch webes eloadás 2014. június 10-én lesz, lehet rá regisztrálni: June 10: Oracle CEO Larry Ellison Live on the Future of Database Performance http://www.oracle.com/us/dm/sev100306382-ww-ww-lw-wi1-ev-2202435.html 10:00 a.m. PT – 11:30 a.m. PT, azaz számunkra 19:00-20:30 CET között. Az Oracle Database In-Memory valós idoben villámgyors lekérdezéseket hajt végre, nagyságrendekkel felgyorsíthatja a lekérdezéseket, és a tranzakciók is gyorsabbak lesznek, mindez az alkalmazások megváltoztatása nélkül! Oracle Database In-Memory: Powering the Real-Time Enterprise Nézze meg Ön is a launch eseményt!

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  • The JavaFX Community Site on Java.net

    - by Tori Wieldt
    Community activity surrounding JavaFX has been steadily growing, with tweets, blog posts, and projects increasing in number. We are pleased to announce that there is now a JavaFX community site on Java.net at the following URL: javafxcommunity.com  This site is an aggregator of JavaFX information, where you can find links to JavaFX blog posts, tweets, and other resources.  Gerrit Grunwald and Jim Weaver are the community leaders for this site, and they welcome your feedback on how to make the JavaFX Community site more useful to you! Learn more on Jim Weaver’s Rich-Client Java Blog. 

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  • INVITATION: Formez-vous sur la solution Oracle Database Appliance !

    - by mseika
    Formez-vous sur la solution Oracle Database Appliance ! Cher partenaire, Arrow a le plaisir de vous inviter au bootcamp ODA - Oracle Database Appliance - qui aura le 30 octobre prochain à Colombes, dans les locaux d’Oracle France. Venez découvrir comment conquérir de nouveaux marchés grâce à lanouvelle appliance base de données Oracle! Arrow vous propose une demi-journée pour comprendre ODA et démontrer les bénéfices de cette solution accessible à tous. Au programme de cet après-midi de formation : une démonstration réalisée en temps réel sur la machine Arrow, déplacée pour l’occasion et de multiples échanges avec notre spécialiste ODA , Stéphane KIDJO, Consultant Avant-Vente chez Arrow. AGENDA : 14h00 - Accueil-café14h20 – Lancement de la démonstration :• Présentation et installation de l’appliance• Présentation de la solution : positionnement marché, bénéfices• Proposition de valeur• Une solution tarifaire attractive 16h00 - De nouvelles opportunités pour vendre Oracle 11g R2 et ses options 16h30 – Désinstallation de l’appliance 16h45 – Questions & Réponses 17h00 – Echanges autour d’un goûter Ce workshop est gratuit. Pré-inscription obligatoire. Nombre de places limité.

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  • Oracle OpenWorld Call for Papers is Now Open through April 9th!

    - by Di Seghposs
    Get Your Papers Ready!! The OpenWorld 2012 Call for Papers is Now Open!! Interested in sharing your Oracle UPK story at the most important educational conference of 2012? Customers or partners who would like an opportunity to speak at OpenWorld should submit an abstract. If your session is selected, Oracle will waive the conference registration fee – saving you anywhere from $1,795 to $2,595. For details about the conference, visit the Oracle OpenWorld website.          Click here to submit your OpenWorld Session Abstract. Don't delay -- submit your abstract today - the Call for Papers closes on April 9, 2012 - Share your Oracle UPK Success Story at Oracle OpenWorld!

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  • Java-Powered Robot Named NAO Wows Crowds

    - by Tori Wieldt
    He drew a crowd where he went at JavaOne. And only being 22.5 inches/573 mm tall, that's pretty impressive. Nao (pronounced now) is an autonomous, programmable humanoid robot developed by Aldebaran Robotics, a French robotics company. Over 200 academic institutions worldwide have made use of the robot. In this video from JavaOne, Nicolas Rigaud shows off the NAO robot which you can control with Java. We are eager to see what Java developers can do with a robot that can walk, talk, see, hear, and dance. &amp;amp;amp;amp;amp;amp;lt;span id=&amp;amp;amp;amp;amp;amp;quot;XinhaEditingPostion&amp;amp;amp;amp;amp;amp;quot;&amp;amp;amp;amp;amp;amp;gt;&amp;amp;amp;amp;amp;amp;lt;/span&amp;amp;amp;amp;amp;amp;gt; You can see several pictures in the blog Aldebaran Robotics at JavaOne. Learn more about the Aldebaran robotics developer program.

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  • Java: How to Make a Player Class in a Tile-Based RPG

    - by A.K.
    So I've been following a JavaHub tutorial that basically uses a pixel engine similar to MiniCraft. I've attempted to make a Player Class as such, and I'm basically making a mock Pokemon game for learning's sake: package pokemon.entity; import java.awt.Rectangle; import pokemon.gfx.Screen; import pokemon.levelgen.Tile; import pokemon.entity.SpritesManage;; public class Player { int x, y; int vx, vy; public Rectangle AshRec; public Sprite AshSprite; Screen screen; Sprite[][] AshSheet; public Player() { AshSprite = SpritesManage.AshSheet[1][0]; AshRec = new Rectangle(0, 0, 16, 16); x = 0; y = 0; vx = 1; vy = 1; screen.renderSprite(0, 0, AshSprite); } public void update() { move(); checkCollision(); } private void checkCollision() { } private void move() { AshRec.x += vx; AshRec.y += vy; } public void render(Screen screen, int x, int y) { screen.renderSprite(x, y, AshSprite); } } I guess what I really want to do is have the Player centered in the screen and have the sprite drawn based on an Input Handler. I'm just stumped as to how to sync these together.

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  • Oracle Fusion Tap: un approccio facile, intuitivo e integrato per l'uso del CRM e dell'HCM su iPad

    - by antonella.buonagurio
    Oracle ha reso  disponibile per tutti Oracle Fusion Tap, un’applicazione nativa per iPad che ridefinisce il livello di produttività che gli utenti possono ottenere anche on-the-go. Oracle Fusion Tap si integra perfettamente con le applicazioni enterprise basate sul cloud e con Oracle Application Cloud Services, richiede la semplice installazione dall’Apple App Store installation. Personalizzato in modo automatico per ciascun utente, Oracle Fusion Tap è in grado di fornire agli utenti esattamente quello di cui hanno bisogno con un semplice tocco delle dita e garantisce quelle funzionalità chiave altamente richieste per rimanere produttivi e mantenere alto il livello del business, anche quando si è lontani dalla scrivania. Provatelo subito scaricandolo dall'Apple Apps Store!

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  • Java game design question (graphical objects)

    - by vemalsar
    Hello Guys, I'm beginner in game development, in Java and here on this site too and I have a game design question. Please comment my idea: I have a main loop which call update and draw method. I want to use an ArrayList which store graphical objects, they have coordinate and image or text to draw and my game objects extends this class. In update, I can choose which objects should be put in the array and in draw method I'll display the elements of array on the screen. I'm using a buffer and draw first there, but it is not important now I guess...Here is a simple (not full) code, only the logic: public class GamePanel extends JPanel implements KeyListener { ArrayList<graphicalObjects> graphArray = new ArrayList<graphicalObjects>(); public void update() { //change the game scene, update the graphArray, process input etc. } public void draw() { //draws every element of graphArray to a JPanel } public static main(String[] args) { while(true) { update(); draw(); } } } My questions: Should have I use interface or abstract class for graphicalObjects? graphicalObjects class and the ArrayList really needs or there is some better solution? How to draw objects? They draw themself with their own method or in the draw method I have to draw manually based on graphicalObjects variables (x,y coordinates, image etc.)? If this conception is wrong, please suggest another one! All comments are welcome and sorry if this is dumb question, thanks!

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  • JAVA Gui on Hello World [closed]

    - by user58892
    I am designing, implementing, testing, and debuging a GUI-based version of a “Hello, World!” program in a JFrame that includes a JLabel that reads “Hello, World!” and I am trying to use a layout manager, and an Exit button to close the program. Here's what I have so far, I would really apreciate if you could help on it syntax. I am 90% done but tried hard and it couldn't run. import java.awt.*; // Needed for flow layout manager import javax.swing.*; //All swing components live in the javax.swing package import javax.swing.JButton; //to recognize buttons import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JTextField; public class HelloWorld { public static void main(String[] args) { //creates the label. The JLabel constructor //takes an optional argument which set the text of the label /* The text will be aligned with the center of the frame * otherwise it will align on the left. */ JLabel label= new JLabel("Hello World!"); new FlowWindow(); label.setHorizontalAlignment (SwingConstants.CENTER); JFrame frame = new JFrame("Hello"); //create exit button JButton button1 = new JButton("Exit"); //Add exit button to the content pane. add(button1); frame.add(label); frame.setSize(300, 300); frame.setVisible(true); frame.setLocationRelativeTo(null); frame.toFront(); } public static void FlowWindow() { //Add a new FlowLayout()); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } }

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  • Add & Show data in Java ArrayList [closed]

    - by Kaidul Islam Sazal
    I have a class inside a main class : static class Graph{ static int u, v, cost; } I have instantiated an arraylist of the class: static List<Graph> g = new ArrayList<Graph>(); And I insert several values into the arraylist like this: Scanner input = new Scanner(System.in); for (int i = 0; i < edge_no; i++) { Graph e = new Graph(); e.u = input.nextInt(); e.v = input.nextInt(); e.cost = input.nextInt(); g.add(e); } And I print it like this: for (int i = 0; i < edge_no; i++) { System.out.println(g.get(i).u + " " + g.get(i).v + " " + g.get(i).cost); } But the problem is that, when I print it, only the last value is shown all the time.It seems that, all the previous values are over-written with it. Input : 1 2 5 1 3 8 2 3 9 Output: 2 3 9 2 3 9 2 3 9 Expected output is just like the input.But I can't fix the problem as I am novice in java.

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  • How to configure Firefox to use Oracle Java in XUbuntu 12.04?

    - by Ivan
    It was ok in the past but something has broken some months ago and my bank client authentication Java applet stopped working. Now I have to reboot to Windows and use it from there. I have installed (and am using for different purposes) Oracle JDK (manually, from official Oracle distribution files) on XUbuntu but I think Firefox Java plugin still uses OpenJDK. How to set up and make sure Firefox to use a specific Oracle JDK?

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  • Sign E-Business Suite JAR Files Now

    - by Steven Chan (Oracle Development)
    Oracle E-Business Suite uses Java, notably for running Forms-based content via the Java Runtime Environment (JRE) browser plug-in.  The default security settings for the JRE plug-in are expected to become more stringent over time.  To prepare for upcoming changes to Java security, all EBS 11i, 12.0, 12.1, and 12.2 system administrators must follow the procedures documented here: Enhanced Signing of Oracle E-Business Suite JAR Files (Note 1591073.1 ) More information about Java security is available here: Security of the Java Platform Getting help If you have questions about Java Security, please log a Service Request with Java Support. If you need assistance with the steps for signing EBS JAR files, please log a Service Request against the "Oracle Applications Technology Stack (TXK)" > "Java."

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  • Checking validation of entries in a Sudoku game written in Java

    - by Mico0
    I'm building a simple Sudoku game in Java which is based on a matrix (an array[9][9]) and I need to validate my board state according to these rules: all rows have 1-9 digits all columns have 1-9 digits. each 3x3 grid has 1-9 digits. This function should be efficient as possible for example if first case is not valid I believe there's no need to check other cases and so on (correct me if I'm wrong). When I tried doing this I had a conflict. Should I do one large for loop and inside check columns and row (in two other loops) or should I do each test separately and verify every case by it's own? (Please don't suggest too advanced solutions with other class/object helpers.) This is what I thought about: Main validating function (which I want pretty clean): public boolean testBoard() { boolean isBoardValid = false; if (validRows()) { if (validColumns()) { if (validCube()) { isBoardValid = true; } } } return isBoardValid; } Different methods to do the specific test such as: private boolean validRows() { int rowsDigitsCount = 0; for (int num = 1; num <= 9; num++) { boolean foundDigit = false; for (int row = 0; (row < board.length) && (!foundDigit); row++) { for (int col = 0; col < board[row].length; col++) { if (board[row][col] == num) { rowsDigitsCount++; foundDigit = true; break; } } } } return rowsDigitsCount == 9 ? true : false; } I don't know if I should keep doing tests separately because it looks like I'm duplicating my code.

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  • JDK 8u20 Documentation Updates

    - by joni g.
    JDK 8u20 has been released and is available from the Java Downloads page. See the JDK 8u20 Update Release Notes for details. Highlights for this release: The Medium security level has been removed. Now only High and Very High levels are available. Applets that do not conform with the latest security practices can still be authorized to run by adding the sites that host them to the Exception Site List. See Security for more information. The javafxpackager tool has been renamed to javapackager, and supports both Java and JavaFX applications. The -B option has been added to the javapackager deploy command to enable arguments to be passed to the bundlers that are used to create self-contained applications. See javapackager for Windows or Linux and OS X for information. The <fx:bundleArgument> helper parameter argument has been added to enable arguments to be passed to the bundlers when using ant tasks. See JavaFX Ant Task Reference for more information. A new attribute is available for JAR file manifests. The Entry-Point attribute is used to identify the classes that are allowed to be used as entry points to your application. See Entry-Point Attribute for more information. A new Microsoft Windows Installer (MSI) Enterprise JRE Installer, which enables users to install the JRE across the enterprise, is available for Java SE Advanced or Java SE Suite licensees. See Downloading the Installer in JRE Installation For Microsoft Windows for more information. The following new configuration parameters are added to the installation process to support commercial features, for use by Java SE Advanced or Java SE Suite licensees only: USAGETRACKERCFG= DEPLOYMENT_RULE_SET= See Installing With a Configuration File for more information about these and other installer parameters. Documentation highlights: New Troubleshooting Guide combines and replaces the Desktop Technologies Troubleshooting Guide and the HotSpot Virtual Machine Troubleshooting Guide to provide a single location for diagnosing and solving problems that might occur with Java Client applications. New Deployment Guide combines and replaces the JavaFX Deployment Guide and the Java Rich Internet Applications Guide to provide a single location for information about the Java packaging tools, creating self-contained applications, and deploying Java and JavaFX applications. New Garbage Collection Tuning Guide describes the garbage collectors included with the Java HotSpot VM and helps you choose which one to use. The Java Tutorials have a new look.

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  • VDC Research Webcast: Engineering Business Value in the IoT with Java 8

    - by tangelucci
    Date: Thursday, June 19, 2014 Time: 9:30 AM PDT, 12:30 PM EDT, 17:30 GMT The growth of the Internet of Things (IoT) opens up new service-driven opportunities, delivering increased efficiencies, better customer value, and improved quality of life. Realizing the full potential of the Internet of Things requires that we change how we view and build devices. These next-generation systems provide the core foundation of the services, rapidly transforming data to information to value. From healthcare to building control systems to vehicle telematic systems, the IoT focuses on how conneted devices can become more intelligent, enhance interoperability with other devices, systems and services, and drive timely decisions while delivering real business return for all. Join this webcast to learn about: Driving both revenue opportunities and operational efficiencies for the IoT value chain Leveraging Java to make devices more secure How Java can help overcome resource gaps around intelligent connected devices Suggestions on how to better manage fragmentation in embedded devices Register here: http://event.on24.com/r.htm?e=793757&s=1&k=4EA8426D0D31C60A2EDB139635FF75AB

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