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Sort Objects by Using a Comparator and a TreeSet

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Part of Collections API and Streams API in Java Topic: Programming

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What you'll do

In this lab, you will implement the java.lang.Comparable and java.lang.Comparator interfaces to define comparisons for objects in a TreeSet.

  1. Import a project that contains the existing classes you will need
  2. Modify a class to implement the Comparable interface
  3. Sort objects by using a TreeSet
  4. Create a new class that implements the Comparator interface
  5. Sort objects by using the new Comparator class and a TreeSet

Note: Once you begin the lab, you will not be able to pause, save, or exit and then return to your lab. Please ensure that you have set aside enough time to complete the lab before you start.

  • ⏱ About 30 minutes
  • Counts towards: Introduction to Java