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JavaBeans

JavaBeans. Jiang Shu, Murali Krishnan (Day 1) Alex Verstak, Umer Farooq (Day 2). What is JavaBean. JavaBeans is a portable, platform-independent component model written in the Java programming language, developed in collaboration with industry leaders.

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JavaBeans

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  1. JavaBeans Jiang Shu, Murali Krishnan (Day 1) Alex Verstak, Umer Farooq (Day 2)

  2. What is JavaBean • JavaBeans is a portable, platform-independent component model written in the Java programming language, developed in collaboration with industry leaders. • The JavaBeans architecture brings the component development model to Java CS6704, Spring 2002

  3. Component Model • Components are self-contained elements of software that can be controlled dynamically and assembled to form applications. • Software component (following a set of rules and guidelines; properties, events, persistence) • Builder tool • Visual manipulation CS6704, Spring 2002

  4. What is a Bean • A Java Bean is a reusable software component that can be manipulated visually in a builder tool. • Simple / Complex • Visible or Invisible CS6704, Spring 2002

  5. Bean Features • Typical unifying features that distinguish a Bean are: • Properties: enable developers to customize and program with Beans • Persistence: enables developers to customize Beans in an app builder, and then retrieve those Beans, with customized features intact, for future use • Events: enables Beans to communicate and connect together • Introspection: enables a builder tool to analyze how a Bean works • Customization: enables a developer to use an app builder tool to customize the appearance and behavior of a Bean CS6704, Spring 2002

  6. BeanBox CS6704, Spring 2002

  7. Common Questions • Applet vs. JavaBeans • Java Foundation Class vs. JavaBeans • JDK1.1 is needed CS6704, Spring 2002

  8. Common Questions (2) • What is Enterprise JavaBean • Enterprise JavaBeans is an API specification for building scalable, distributed, component-based, multi-tier applications. • It leverages and extends the JavaBeans component model to provide a rich object-oriented transactional environment for developers building enterprise applications. CS6704, Spring 2002

  9. Common Questions (3) • What is InfoBus • The InfoBus is a compact Java API which allows cooperating Beans (also applets), on a Web page or in any other Java application, to communicate data to one another • Beans to be categorized as "data providers" and "data consumers". • The InfoBus specification extends JavaBeans by providing a set of enhanced interfaces to share and exchange dynamic data. • BeanConnect? CS6704, Spring 2002

  10. Common Questions (4) • Bridges to ActiveX • Migration Assistant developed by IBM and Taligent • GUI interface • Properties, Events, Methods • Copy implementation code • Currently adding “round-trip” ability CS6704, Spring 2002

  11. Common Questions (5) • What is Glasgow • To create more sophisticated JavaBeans components and applications • The Extensible Runtime Containment and Services Protocol • The Drag and Drop Subsystem • The JavaBeans Activation Framework (JAF) • Edinburgh CS6704, Spring 2002

  12. More Info • JavaBeans Components by Category (also called “Directory”) http://industry.java.sun.com/solutions/1,2346,beans,00.html …. Electronic Commerce (44) Electronic Publishing (25) Entertainment (6) Financial Services (23) Health Care (8) …. CS6704, Spring 2002

  13. More Info (2) • JavaBeans 1.01 Specification ftp://ftp.javasoft.com/docs/beans/beans.101.pdf • JavaBeans API http://java.sun.com/j2se/1.3/docs/api/java/beans/package-summary.html CS6704, Spring 2002

  14. More Info (3) • Tutorial by Andy Quinn • Complete & Comprehensive http://java.sun.com/docs/books/tutorial/javabeans/ • Short Ones A. JavaBeans Part I, Part II and Part III by Greg Voss http://java.sun.com/products/javabeans/training.html B. Java Beans 101 Tutorial Part I, Part II and Part III by Beth Stearns http://developer.java.sun.com/developer/onlineTraining/index.html CS6704, Spring 2002

  15. More Info (4) • Articles and Books http://java.sun.com/products/javabeans/docs/ • News Group news:comp.lang.java.beans • Mailing List send mail to listserv@javasoft.com In the body of the message, type: SUBSCRIBE BEANS-INFO CS6704, Spring 2002

  16. Reference • Robert Englander, “Developing Java Beans”, O’Reilly, 1997 • JavaBeans Official Site http://java.sun.com/products/javabeans/ • JavaBeans 1.01 specification ftp://ftp.javasoft.com/docs/beans/beans.101.pdf CS6704, Spring 2002

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