Trail: Learning the Java Language
Lesson: Classes and Objects
Questions and Exercises
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Questions and Exercises: Nested Classes


  1. The program doesn't compile. What do you need to do to make it compile? Why?

  2. Use the Java API documentation for the Box class (in the javax.swing package) to help you answer the following questions.

    1. What static nested class does Box define?

    2. What inner class does Box define?

    3. What is the superclass of Box's inner class?

    4. Which of Box's nested classes can you use from any class?

    5. How do you create an instance of Box's Filler class?


  1. Get the file Compile and run Class1. What is the output?

Check your answers.

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