Java Stream filter() Method with Real-World Examples

Learn how to use Java’s Stream filter() method to filter collections efficiently. Apply conditional filtering on numbers, strings, and objects with real-world use cases.

🚀 Introduction to Java Stream filter() Method

The Stream API in Java provides the filter() method, which allows you to process collections and extract elements based on conditions.

✅ What Does filter() Do?

• Filters each element in a stream based on a predicate (boolean condition).
• Produces a new Stream containing only elements that match the condition.
• Improves efficiency by avoiding manual iteration.

💡 Common Use Cases:
✔ Filter even numbers from a list
✔ Extract specific strings from a collection
✔ Filter custom objects based on multiple conditions

📌 In this article, you’ll learn:
✅ How to use filter() with different data types.
✅ How to filter numbers, strings, and custom objects efficiently.
✅ Best practices for using filter() effectively.

1️⃣ Filtering Even Numbers from a List

✔ Traditional Way (Before Java 8)

import java.util.ArrayList;
import java.util.Arrays…