Sams Teach Yourself Java 2 in 24 Hours

By Rogers Cadenhead

• Table of Contents
  • Copyright
  • About the Author
  • About the Technical Editor
  • Acknowledgments
  • We Want to Hear from You!
  • Reader Services
  • Introduction
  • Hour 1. Becoming a Programmer
  • Hour 2. Writing Your First Program
  • Hour 3. Vacationing in Java
  • Hour 4. Understanding How Java Programs Work
  • Part II: Learning the Basics of Programming
  • Hour 5. Storing and Changing Information in a Program
  • Hour 6. Using Strings to Communicate
  • Hour 7. Using Conditional Tests to Make Decisions
  • Hour 8. Repeating an Action with Loops
  • Part III: Working with Information in New Ways
  • Hour 9. Storing Information with Arrays
  • Hour 10. Creating Your First Object
  • Hour 11. Describing What Your Object Is Like
  • Hour 12. Making the Most of Existing Objects
    • The Power of Inheritance
    • Establishing Inheritance
    • Working with Existing Objects
    • Workshop: Creating a Subclass
    • Summary
    • Q&A
    • Quiz
    • Activities
  • Part IV: Programming a Graphical User Interface
  • Hour 13. Building a Simple User Interface
  • Hour 14. Laying Out a User Interface
  • Hour 15. Responding to User Input
  • Hour 16. Building a Complex User Interface
  • Part V: Creating Multimedia Programs
  • Hour 17. Creating Interactive Web Programs
  • Hour 18. Handling Errors in a Program
  • Hour 19. Creating a Threaded Program
  • Hour 20. Reading and Writing Files
  • Part VI: Creating Multimedia Programs
  • Hour 21. Using Fonts and Color
  • Hour 22. Playing Sound Files
  • Hour 23. Working with Graphics
  • Hour 24. Creating Animation
  • Part VII: Appendixes
  • Appendix A. Tackling New Features of Java 2 Version 1.4
  • Appendix B. Using the Java 2 Software Development Kit
  • Appendix C. Programming with the Java 2 Software Development Kit
  • Appendix D. Using Sun ONE Studio
  • Appendix E. Where to Go from Here: Java Resources
  • Appendix F. This Book's Web Site

Quiz

To determine what kind of knowledge you inherited from the past hour's work, answer the following questions.

Questions

1. If a superclass handles a method in a way you don't want to use in the subclass, what can you do?
   1. Delete the method in the superclass.
   2. Override the method in the subclass.
   3. Write a nasty letter to the editor of the San Jose Mercury News hoping that Java's developers will read it.
2. Which of the following is not a benefit of JavaBeans?
   1. Objects can be shared easily with other programmers.
   2. A Bean can be used with any development tool that supports the standard.
   3. They cause emissions that violate stringent air quality standards in most countries.
3. What statement can you use to refer to the methods and variables of the current object?
   1. this
   2. that
   3. theOther

Answers

1. b. Because you can override the method, you don't have to change any aspect of the superclass or the way it works.
2. c. You're thinking of an entirely different type of bean. This question is dedicated to my father, who is prohibited by local statute from eating Ranch Style Beans in a poorly ventilated environment.
3. a.

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