Java 6 in 21 Days (5th Edition) Day 10: Building a Swing Interface

Notes and Corrections

View the Certification Practice quiz solution
Certification answer: Answer (c) is correct. A call to super(), the constructor method of a superclass, must always be the first line in a constructor method. The compiler fails and displays the message "call to super() must be first statement in constructor."
Answer (b) is incorrect because the source code does not compile. However, it is true that nothing is displayed in the frame[md]the slider component was never added to the content pane.
Answer (a) is incorrect because the source code does not compile and does not run successfully[md]the frame is displayed but nothing is shown in the frame. The slider component was never added to the content pane.
Answer (d) is incorrect because the call to setContentPane() is correct.
Pages 292-293: In Listing 10.4 on line 41, the word "are" appears in error. That word must be removed for the application to compile correctly. The correct ProgressMonitor.java source code is available on this web site.