Java java.util.stream Collectors

• Java

• java.util.stream

• • java.util.stream

  • Collectors

  • DoubleStream

  • IntStream

  • LongStream

  • Stream

Introduction

1. Java Collectors collect then convert
2. Java Collectors collect to List
3. Java Collectors collect to map
4. Java Collectors collect to map with lambda expression
5. Java Collectors collect to map with two lambda expressions
6. Java Collectors count
7. Java Collectors group and count
8. Java Collectors group and map



9. Java Collectors group and summarize
10. Java Collectors group, map and collect to List
11. Java Collectors group, map and join
12. Java Collectors join
13. Java Collectors join with separator
14. Java Collectors join with separator, starting String and ending String
15. Java Collectors partition
16. Java Collectors partition, map and join



17. Java Collectors summarize double
18. Java Collectors summarize int
19. Java Collectors summarize long