https://github.com/asrieldreemurrgm/java_streams_study

Study repository focused on exploring Java Streams, showcasing various intermediate and terminal operations with practical examples.
https://github.com/asrieldreemurrgm/java_streams_study

collect foreach functional-programming intermediate-operations java java-8 lambda-expressions optional spring-tool-suite4 stream-api streams terminal-operations

Last synced: 4 days ago
JSON representation

Study repository focused on exploring Java Streams, showcasing various intermediate and terminal operations with practical examples.

• Host: GitHub
• URL: https://github.com/asrieldreemurrgm/java_streams_study
• Owner: AsrielDreemurrGM
• Created: 2025-06-16T01:42:37.000Z (about 1 year ago)
• Default Branch: main
• Last Pushed: 2025-06-19T12:53:05.000Z (about 1 year ago)
• Last Synced: 2025-10-30T03:08:03.456Z (9 months ago)
• Topics: collect, foreach, functional-programming, intermediate-operations, java, java-8, lambda-expressions, optional, spring-tool-suite4, stream-api, streams, terminal-operations
• Language: Java
• Homepage:
• Size: 25.4 KB
• Stars: 0
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

          
Java Streams Study



  Study repository focused on exploring Java Streams, showcasing a wide range of intermediate and terminal operations

  using clear, commented examples for learning purposes.



📌 Features



  
Creating streams from collections, arrays, sets, and maps;

  
Filter, map, distinct, sorted, limit, and forEach operations with Lambdas;

  
Counting and validating elements with count() and allMatch();

  
Collecting stream results into lists, sets, maps, and grouping with Collectors;

  
Working with Optional to find max/min (e.g., oldest and youngest);

  
Filtering by gender using console input and stream logic.



🗂️ Project Structure



  


br.com.eaugusto: Contains the shared Person.java class used by most examples, and the CreatingStreams.java class for stream creation;

  


br.com.eaugusto.intermediateoperations: Filter, Map, Limit, Distinct, Sorted, etc;

  


br.com.eaugusto.terminaloperations: forEach, count, allMatch and collectors;

  


br.com.eaugusto.coursetask: Exercise involving filtering by gender using input, has its own Person.java class;



🚀 How to Run



  
Clone this repository and open it in your IDE (Spring Tool Suite, Eclipse, IntelliJ);

  
Each class has a main method with examples that can be run directly;

  
Review the inline comments and Javadocs for detailed explanations of each operation.



📅 Commit Highlights

June 19, 2025



  
Created filtering by gender using FilterByGender and the new local Person class specific to the new coursetask package.



June 18, 2025



  
Added optional examples for finding youngest and oldest entries;

  
Renamed CollectExample to CollectExamples and added Javadocs.



June 17, 2025



  
Implemented various Collectors: toList, toSet, toMap, groupingBy, etc.;

  
Expanded Person and added grouping examples.



June 16–15, 2025



  
Created classes for: filter, map, limit, distinct, sorted, and forEach examples;

  
Built helper methods to populate people and reuse logic.



🎯 Learning Goals



  
Understand how Java Stream API simplifies collection processing;

  
Practice real-world stream operations with filtering, mapping and aggregation;

  
Apply functional programming concepts like lambdas and method references;

  
Explore Optional handling for safer data retrieval.