Part-3 Functional Interface (Consumer)

📰 Dev.to · s mathavi

Learn about Java's Consumer interface, a functional interface for handling data without returning a value, and how to apply it in coding

intermediate Published 3 Mar 2026

Action Steps

Import the java.util.function package to access the Consumer interface
Implement the Consumer interface using a lambda expression or a method reference
Use the accept() method to handle data without returning a value
Chain multiple Consumer instances together using the andThen() method
Test the Consumer implementation with sample data to verify its correctness

Who Needs to Know This

Software engineers and developers working with Java can benefit from understanding the Consumer interface to write more efficient and functional code

Key Insight

💡 The Consumer interface is a functional interface that represents an operation that accepts a single input argument and returns no result

Full Article

Consumer: Consumer is an interface in java. A functional interface in...