In this ppt, we will explore quick and practical guide to the most interesting features coming to Java 9/11. Agenda: 1. Jshell 2. Improvements 3. StackWalker 4. Http2 Client 5. Modularity

1. - Kunal Sethi (Software Consultant)
- Jasmine Kaur (Software Consultant)

2. ❏ Jshell
❏ Improvements
❏ StackWalker
❏ Http2 Client
❏ Modularity

3. (Java REPL)
➢ Jshell is nothing it’s just java repl
How to start jshell
>> jshell
How to exit from jshell
>> /exit
>> /ex

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➢ Convenience factory methods for collections.
eg. List.of(1, 2 , 3, 4 , 5)
eg. Map.of(1, “Kunal”, 2, “Jasmine”)
eg. Set.of(1, 2, 2 ,3 , 5 , 9)

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➢ Streams API
Methods: dropWhile(), takeWhile()
Method: Intstream.iterate()
Method: Stream.ofNullable()

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➢ Interface
Interface with private methods.
➢ try with resource
Effectively final try with resource.
➢ Optional
ifPresentOrElse()
Optional.stream()

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➢ CompletableFutures
Methods: completeOnTimeout()
orTimeout()
copy()

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❏ StackWalker is thread-safe. Multiple threads can share a single
StackWalker object to traverse its own stack.
eg. StackWalker.getInstance.walk()

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❏ The protocol-specific requirements are defined in the Hypertext
Transfer Protocol Version 2 (HTTP/2), the Hypertext Transfer Protocol
(HTTP/1.1), and The WebSocket Protocol.
❏ This new API is kind of built around three main classes these are:
● HttpClient
● HttpRequest
● HttpResponse

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Comparison between Java 1.8 and Java 1.9
❏ NoClassDefFoundError
❏ Version Conflict
❏ Security Issues
❏ Bigger size

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❏ Module Structure

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What If???

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❏ https://www.youtube.com/watch?v=K8Jc_EaBVMI
❏ https://www.youtube.com/watch?v=0RegttLUXeU
❏ https://blog.knoldus.com/
❏ https://www.youtube.com/watch?v=Yacu1yUktjY