Creating Animation with Java

Jan 3, 2003

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This chapter is from the book 

Sams Teach Yourself Java 2 in 24 Hours, 3rd Edition

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Quiz

Animate yourself as much as you can muster and answer the following questions to test your skills.

Questions

Where is the (0,0) coordinate on a container?
1. In an offscreen double-buffering area
2. The exact center of the window
3. The upper-left corner of the container
What thing did you not learn during this hour?
1. How to load images in an application
2. How to make sure an image is not displayed until it loads
3. Why the tennis ball is bouncing off thin air instead of the ground in the BouncePanel application.
In a threaded animation applet, where should you handle most of the movement of an image?
1. The run() method
2. The init() method
3. The paint() method

Answers

c. The x value increases as you head to the right, and the y value increases as you head downward.
c. Would you believe clear-air turbulence?
a. Some movement might be handled by statements in the paint() method, but most of it will take place in run() or a method called from within run().

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