https://github.com/g-khan/java9-examples

Java 9 features example
https://github.com/g-khan/java9-examples

Last synced: 8 days ago
JSON representation

Java 9 features example

• Host: GitHub
• URL: https://github.com/g-khan/java9-examples
• Owner: G-khan
• Created: 2020-09-01T04:28:05.000Z (about 4 years ago)
• Default Branch: master
• Last Pushed: 2020-09-01T04:31:02.000Z (about 4 years ago)
• Last Synced: 2023-07-19T17:34:39.098Z (over 1 year ago)
• Language: Java
• Size: 1.95 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

Awesome Lists containing this project

README

        
# Java 9  Features Example 

## Features:

 - **Private Methods in Interface:** Encapsulation is possible in interface that mean you can avoid code duplication in default methods. Also private interface methods can be *static* or *instance*. 

      _see_: Magician class prepareForMagic method

    

 - **Optional Class Improvements**  _see_: Spectators class

	  - Optional.ifPresentOrElse()

	  - Optional.or()

	  

 - **Immutable Collection Factory** _see_: Spectators class

	  - `List names = List.of("Gokhan", "Ahmet", "Ayse");`

		  - Cannot set null item in to List.of: `java.lang.NullPointerException`

		  - Cannot add new item: `UnsupportedOperationException`

	  - `Set names = Set.of("Gokhan", "Ahmet", "Ayse");`

		  - Cannot set null item in to List.of: `java.lang.NullPointerException`

		  - Cannot add new item: `UnsupportedOperationException`

		  - Cannot add duplicate item: `IllegalArgumentException`

	  - `Map immutableMap =  Map.of("Key1",  "Gokhan",  "Key2",  "Ahmet");`

		  - Cannot put new key value pair: `UnsupportedOperationException`

Example inspired by https://www.polidea.com/blog/Exploring-Java-9Private-Interface-Methods/