Hour 20: Responding to User Events with Swing

NOTES AND CORRECTIONS

• You can try out a Java 1.02 version of the LottoMadness applet on this site, and also run a souped-up version called LottoRobics.
• The TextListener interface works for Java 1.02 and 1.1 text fields, but monitoring text changes in Swing requires the use of the DocumentListener interface and the Document class. A new section is being prepared on the use of this interface and will be published on the site so you can complete the hour's second activity.
• The variable name command is incorrect on Page 324, Line 137. The corrected line is the following:
  • Object item = event.getItem();

SOURCE FILES

• LottoMadness.java
• LottoMadness.class
• LottoMadness.html

READER QUESTIONS

• None

ACTIVITIES

• Solution #1: LottoMadness2.java, LottoMadness2.class, and LottoMadness2.html.
• Solution #2: See the note above regarding TextListener.