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
  • 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
    • Scroll Panes
    • Sliders
    • Change Listeners
    • Menus
    • Workshop: Using Image Icons and Toolbars
    • Summary
    • Q&A
    • Quiz
    • Questions
    • Activities
  • 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

Questions

1. What graphics file formats are supported by the ImageIcon class?
   1. GIF
   2. GIF and JPEG
   3. GIF, PNG, and JPEG
li>What does a JSlider object's getValueIsAdjusting() method accomplish?
1. It determines whether the slider has been changed from its original value.
2. It determines whether the slider is currently being changed in value.
3. Not a lot; this method is a major disappointment to its parent superclass.
2. The Swing library was named after a style of dance band jazz that was popularized in the 1930s and unexpectedly revived in the 1990s. Which of the following is not a real title of a song performed by a Swing musician?
   1. "Cement Mixer (Put-ti, Put-ti)"
   2. "Barney Google with the Goo Goo Googly Eyes"
   3. "Flat Foot Floogie (with the Floy Floy)"

Answers

1. b. PNG is supported with other Java classes that involve images, but graphics in this format aren't supported by ImageIcon.
2. b. The getValueIsAdjusting() method returns true while the slider is being moved and false otherwise.
3. b. "Barney Google," a hit song by Billy Rose in 1923, was too early for Swing. The other two songs are by Slim Gaillard.

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