hands-on lab

Coding with Java Wrappers, Enums, and Dates

Up to 2h
Get guided in a real environmentPractice with a step-by-step scenario in a real, provisioned environment.
Learn and validateUse validations to check your solutions every step of the way.
See resultsTrack your knowledge and monitor your progress.


This lab provides you with exposure to primitive wrappers, enumerations, and date times when developing with the Java programming language. You will be required to complete the following guided coding exercises:

  • Exercise 1 - Using Primitive Wrappers: Learn how to convert and compare various primitives to their counterpart primitive wrapper objects.
  • Exercise 2 - Working with Enumerations: Declare and use an enumeration to represent a group of related constants
  • Exercise 3 - Working with Dates: Develop a Java Swing-based UI application which will run on your local workstation to manage dates and times

Note: Each exercise comes with the fully completed solution code when required or assistance is needed.

Lab Objectives

Upon completion of this lab, you will be able to:

  • Write Java code that can work with primitives and their counterpart primitive wrapper objects
  • Make use of Enumerations implement a group of related constants
  • Code confidently with date and times
  • Install and use Maven to compile and package (JAR) the Java Swing-based UI application
  • Download and launch a Java Swing-based UI application to your local workstation

You should:

  • Be comfortable with using a browser-based IDE
  • Have a Java 11 JRE or SDK installed and available on a local workstation - this is required to launch a Java Swing-based UI application

Lab Environment

This Lab will start with the following AWS resources provisioned automatically for you:

  • A single EC2 instance, named ide.java.platform.instance, which will have a public IP address attached. This instance will host a web-based Java IDE (based on the Visual Code editor).

To achieve the Lab end state, you will be walked through the process of:

  • Using your local browser, access the web-based Java IDE served from the ide.java.platform.instance
  • Completing the 3 lab exercises:
    • Exercise 1 - Using Primitive Wrappers
    • Exercise 2 - Working with Enumerations
    • Exercise 3 - Working with Dates


September 3rd, 2021 - Updated code snippet instructions to match functionality

June 16th, 2018 - Optimized creation of Lab resources to reduce the time it takes to access the browser IDE by 60%

About the author

Jeremy Cook, opens in a new tab
Content Lead Architect
Learning paths

Jeremy is a Content Lead Architect and DevOps SME here at Cloud Academy where he specializes in developing DevOps technical training documentation.

He has a strong background in software engineering, and has been coding with various languages, frameworks, and systems for the past 25+ years. In recent times, Jeremy has been focused on DevOps, Cloud (AWS, Azure, GCP), Security, Kubernetes, and Machine Learning.

Jeremy holds professional certifications for AWS, Azure, GCP, Terraform, Kubernetes (CKA, CKAD, CKS).

Lab steps

Connecting to the Java Web IDE
Exercise 1: Using Primitive Wrappers
Exercise 2: Working with Enumerations
Exercise 3: Working with Dates