Browse › Collections API and Streams API in Java

Create and Manipulate a Map in Java

Guided

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

Access

StationX Infrastructure Labs — 3 attempts per lab

🔒 Add StationX Infrastructure Labs — $149 / year · 3 attempts per lab

Already have access? Sign in.

New to this? Try a free practice lab — a scripted hacking challenge in your browser, no account needed.

What you'll do

In this lab, you will create and manipulate a map that counts items in a file.

Declare a variable of type Map that contains keys of type String and values of type Integer
Create an instance of the HashMap class
Initialize the contents of the HashMap object by using a scanner
Manipulate the contents of the map by using a while loop and an if-else statement
Iterate over the map and display each element in the map
Display the total number of elements that were defined in the file

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