TextFileSorter

For this homework, you will explore using the Comparable and Comparator interfaces, static nested classes, non-static inner classes, anonymous inner classes, and lambda expressions to sort text files by different properties.

Hints

Below are some hints that may help with this homework assignment:

• Focus first on implementing the Comparable interface for the TextFile static nested class. You will need to modify the declaration of this class and add method(s) for this part.

  ⚠️ There will be at least one warning in the test code until you properly implement the Comparable interface!

• The Comparator members require you to create a comparator instance from a static nested class, non-static inner class, or lambda expression, and there is one method that must return a comparator created using an anonymous inner class. You may add additional classes, methods, members, and/or instances for this part as needed.

• Remember, to initialize an instance of a non-static inner class, you need an instance of the outer class first. See the Java Tutorials: Nested Classes tutorial for examples. One example they provide is:

  OuterClass outerObject = new OuterClass();
  OuterClass.InnerClass innerObject = outerObject.new InnerClass();

  This can be combined into a single line as follows:

   OuterClass.InnerClass example = new OuterClass().new InnerClass();

• This homework will not be directly used by any project. However, it is useful for demonstrating different approaches to sorting data, which may come in handy for project 2 when sorting search results.

These hints are optional. There may be multiple approaches to solving this homework.

Requirements

See the Javadoc and TODO comments in the template code in the src/main/java directory for additional details. You must pass the tests provided in the src/test/java directory. Do not modify any of the files in the src/test directory.

See the Homework Guides for additional details on homework requirements and submission.