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Coding Your Way to Java 12
- 1. By Sander Mak Coding Your Way @Sander_Mak to Java 12
- 2. About Sander Fellow, Software Architect @ Luminis Experience in modular development stacks Conference Speaker & Author
- 4. @Sander_Mak Quick Java Module Overview
- 5. @Sander_Mak module main { } module-info.java Module Declarations
- 6. @Sander_Mak module main { } module-info.java Module Declarations main.web main.persistence main.integration main
- 7. @Sander_Mak module main { requires helper; } module-info.java module helper { } module-info.java Explicit Dependencies main.web main.persistence main.integration main
- 8. @Sander_Mak module main { requires helper; } module-info.java module helper { } module-info.java helper Explicit Dependencies main.web main.persistence main.integration main
- 9. @Sander_Mak module main { requires helper; } module helper { exports helper.api; } module-info.java module-info.java helper.api helper Well-defined Interfaces main.web main.persistence main.integration main
- 10. @Sander_Mak module main { requires helper; } module helper { exports helper.api; } module-info.java module-info.java helper.api helper.impl helper Strong Encapsulation main.web main.persistence main.integration main
- 12. @Sander_Mak Why?
- 15. @Sander_Mak quick refresher why/advantages (JDK: modularized, your app: architecture from whiteboard to code, explicit dependencies in language, strong encapsulation, jlink Why? Decrease the model-code gap
- 18. @Sander_Mak jlink + main lib1 lib2 jdk ~300mb application ~2mb JVM main lib1 lib2 java.base java.logging java.xml Custom Run-time Image ~25mb
- 19. @Sander_Mak jlink + main lib1 lib2 jdk ~300mb application ~2mb JVM main lib1 lib2 java.base java.logging java.xml Custom Run-time Image
- 20. @Sander_Mak IoT Device jlink + main lib1 lib2 jdk ~300mb application ~2mb JVM main lib1 lib2 java.base java.logging java.xml Custom Run-time Image
- 21. @Sander_Mak Impact on Java 8 codebases
- 22. @Sander_Mak Impact on Java 8 codebases Use of encapsulated JDK types: Run-time warnings Compile-time errors
- 23. @Sander_Mak Impact on Java 8 codebases Use of encapsulated JDK types: Run-time warnings Compile-time errors Use of enterprise APIs in JDK: Won't resolve by default Gone in Java 11! java.corba java.xml.bind java.xml.ws.* java.activation java.transaction
- 32. @Sander_Mak R jshell E P L ead val rint oop Input code Run code See results Iteratively refine
- 35. @Sander_Mak List<String> books = new ArrayList<>(); books.add("Java 9 Modularity"); books.add("Designing Data-Intensive Applications"); books.add("Java 8 Lambdas"); Collection Factory Methods
- 36. @Sander_Mak Collection Factory Methods List<String> books = List.of("Java 9 Modularity", "Designing Data-Intensive Applications", "Java 8 Lambdas");
- 37. @Sander_Mak Collection Factory Methods List<String> books = List.of("Java 9 Modularity", "Designing Data-Intensive Applications", "Java 8 Lambdas"); Set.of Map.of
- 39. @Sander_Mak var
- 40. @Sander_Mak var String name = "Sander";
- 41. @Sander_Mak var String name = "Sander"; public void aMethod() { String name = "Sander"; }
- 42. @Sander_Mak var String name = "Sander"; public void aMethod() { String name = "Sander"; } public void aMethod() { var name = "Sander"; }
- 43. @Sander_Mak var URL url = new URL("https://javamodularity.com"); URLConnection connection = url.openConnection(); BufferedInputStream inputStream = new BufferedInputStream(connection.getInputStream());
- 44. @Sander_Mak var URL url = new URL("https://javamodularity.com"); URLConnection connection = url.openConnection(); BufferedInputStream inputStream = new BufferedInputStream(connection.getInputStream()); var bookurl = new URL("https://javamodularity.com"); var connection = bookurl.openConnection(); var bookStream = new BufferedInputStream(connection.getInputStream());
- 45. @Sander_Mak var URL url = new URL("https://javamodularity.com"); URLConnection connection = url.openConnection(); BufferedInputStream inputStream = new BufferedInputStream(connection.getInputStream()); var bookurl = new URL("https://javamodularity.com"); var connection = bookurl.openConnection(); var bookStream = new BufferedInputStream(connection.getInputStream());
- 46. @Sander_Mak var URL url = new URL("https://javamodularity.com"); URLConnection connection = url.openConnection(); BufferedInputStream inputStream = new BufferedInputStream(connection.getInputStream()); var bookurl = new URL("https://javamodularity.com"); var connection = bookurl.openConnection(); var bookStream = new BufferedInputStream(connection.getInputStream()); DEMO
- 48. @Sander_Mak HttpClient HttpURLConnection HTTP/2 & WebSocket Reactive Streams Support
- 54. @Sander_Mak HttpClient HttpClient httpClient = HttpClient.newHttpClient(); HttpRequest req = HttpRequest.newBuilder(URI.create("https://google.com")) .GET() .build(); HttpResponse<String> response = httpClient.send(req, BodyHandlers.ofString())
- 56. @Sander_Mak Preview Feature: Switch Expression
- 57. @Sander_Mak Preview Feature: Switch Expression int numLetters = switch (day) { case MONDAY, FRIDAY, SUNDAY -> 6; case TUESDAY -> 7; case THURSDAY, SATURDAY -> 8; case WEDNESDAY -> 9; };
- 58. @Sander_Mak Let's Talk About Adoption
- 65. @Sander_Mak Java 11 Java 9 Java 10 Java 12 Java 13 6 months Java 11
- 66. @Sander_Mak Java 11 Java 9 Java 10 Java 12 Java 13 6 months Java 11
- 67. @Sander_Mak Java 11 Long Term Support Java 9 Java 10 Java 12 Java 13 6 months Java 11 Java 11 LTS minimum 3 years
- 68. @Sander_Mak Which JDK? JDK 11 changes the game