Day 11: Building Simple User Interfaces for Applets

NOTES AND CORRECTIONS

• None

SOURCE FILES

• Crosshair.java
• Crosshair.class
• Crosshair.html
• MyCanvas.class
• CheckACzech.java
• CheckACzech.class
• CheckACzech.html
• Slacker.java
• Slacker.class
• Slacker.html
• Hamlet.java
• Hamlet.class
• Hamlet.html
• Labels.java
• Labels.class
• Labels.html
• OutOfSite.java
• OutOfSite.html
• OutOfSite.class
• PickAPole.java
• PickAPole.class
• PickAPole.html
• SelectASpaniard.java
• SelectASpaniard.class
• SelectASpaniard.html
• Slider.class
• Slider.java
• Slider.html
• VCR.java
• VCR.class
• VCR.html
• Virginia.java
• Virginia.class
• Virginia.html

READER QUESTIONS

• Q: I am currently programming a quiz applet using check boxes. I have called each check box's setEnabled(false) method to keep users from answer a question twice, and then I have a Reset button after the quiz is finished that re-enables all of the boxes. How can I clear out the answers that were chosen at the same time? I want the check boxes to appear as if the quiz has never been taken after Reset is pressed.
  A: The setState() method is used -- call setState(true) to place a check in a box and setState(false) to remove it. There's more information on all of the methods and variables in Sun's official documentation for java.awt.Checkbox.

LINKS

• Macmillan Computer Publishing's Personal Bookshelf site