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This snippet demonstrates how to use Java Streams to filter and transform collections efficiently. The filter() method selects elements based on a condition, while the map() method transforms each element into a new value. Streams provide a clean, functional programming style that improves readability and reduces boilerplate code. This is one of the most important Java 8+ features and is frequently asked in Java interviews.
Category
streams
Complexity
Time: O(n) | Space: O(n)
Language
Java
Status
Tags
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Published
Last Updated
Production-ready Java implementation for quick revision, interview preparation, and real-world development.
Solution.java
1import java.util.Arrays;2import java.util.List;3import java.util.stream.Collectors;4 5public class StreamFilterMapExample {6 7 public static void main(String[] args) {8 9 List<String> names = Arrays.asList(10 "Rahul",11 "Ankit",12 "Priya",13 "Sneha",14 "Rohit",15 "Aman"16 );17 18 List<String> filteredNames = names.stream()19 .filter(name -> name.length() >= 5)20 .map(String::toUpperCase)21 .collect(Collectors.toList());22 23 System.out.println("Filtered Names:");24 25 filteredNames.forEach(System.out::println);26 }27}Keywords
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