Java Streams collect() Explained with Examples | toList, toMap, groupingBy, partitioningBy скачать в хорошем качестве

Java Streams collect() Explained with Examples | toList, toMap, groupingBy, partitioningBy

In this video, we deeply explore the collect() method in Java Streams with real and practical examples. You’ll learn: ✔ How collect() works internally in Java Streams ✔ Collectors.toList(), toSet(), and toMap() with examples ✔ Why Collectors.toMap() throws IllegalStateException and how to fix it ✔ How to group data using Collectors.groupingBy() ✔ How to split data using Collectors.partitioningBy() ✔ Best practices and interview tips This video is perfect for: Java developers learning Streams Interview preparation (Java 8+) Writing clean and readable functional code ⏱ Chapters: 00:00 What you’ll learn 00:29 What is collect() in Java Streams 00:59 Why collect() is needed 01:29 Collectors.toList() example 04:38 Collectors.toSet() example 05:51 Collectors.toMap() with duplicate keys 10:12 Solving IllegalStateException in toMap() (duplicate keys) 10:56 Group elements using Collectors.groupingBy() 17:16 Partition data using Collectors.partitioningBy() 19:55 Common mistakes & best practices 20:23 Summary 📌 Related Videos: Java Streams filter() explained Java Streams map() explained Java Streams forEach() explained If you found this helpful, like the video and subscribe for more Java Streams and interview-focused content.