Java HashMaps in Practice: Revision and Application

Strengthen your understanding and application of hashmap data structures with a focus on counting and aggregation tasks. This course will deepen your comprehension of efficient data access and manipulation using hashmaps.

Lessons and practices

Lesson 1: Introduction to HashMaps in Java

Updating Library Catalog Entries

Fix the LibraryCatalog HashMap

Check if a Book Exists in the Library Catalog

Updating and Accessing Elements in a HashMap

Updating Book Titles in a Library Catalog Using HashMap in Java

Lesson 2: Introduction to HashMaps in Java for Counting Occurrences

Optimizing Color Counting Using Java HashMaps

Fix the Book Counter Code

Counting Returned Books Using HashMap in Java

Counting Letter Frequency Using HashMap

Counting Book Titles Using HashMap in Java

Lesson 3: Data Aggregation Using HashMaps in Java

Calculating Average Quantity of Items in a Grocery Store Inventory

Finding Minimum Quantity in Fruit Inventory

Data Aggregation in a Grocery Inventory Using HashMap

Comparing Fruit Inventory to Average Stock Levels

Determine the Maximum Count of Any Fruit in Inventory

Lesson 4: Applying HashMaps to Real-World Challenges in Java

Ensure Book's Available Copies Are Decremented Only When Available

Fix the Book Information Display Issue in Library Catalog

Managing Library Inventory Using HashMaps in Java

Counting Word Frequencies in a String

Library Management System Using HashMaps

Interested in this course? Learn and practice with Cosmo!

Practice is how you turn knowledge into actual skills.