Java11/Examples

PAGE UNDER CONSTRUCTION =======

This is an informal page listing examples of features that are implemented by the Java 11 Support. You are welcome to try out these examples. If you find bugs, please file a bug after checking for a duplicate entry here.

	Feature / Steps	Expected Result
The Pre-requisite: Java 11 JRE Support
Add Java 11 JRE	Use Window -> Preferences-> Java -> Installed JREs -> Add... [note: Eclipse -> Preferences in Mac / Window -> Preferences in Windows]	(NOT YET AVAILABLE) Java 11 JRE recognized as a valid JRE
Project JRE	In Package Explorer Use project's context menu and add Java 11 JRE	JRE specific (eg Object) gets resolved in the project.
Package Explorer	Go to Package Explorer and expand the Java 11 JRE	(NOT YET IMPLEMENTED) Modules (eg java.base etc) are listed in the package explorer view
The First Step: Java 11 Compliance
Set Project Compliance in Package Explorer	Context Menu of Project -> Properties -> Set project-specific, drop down to 11	(NOT YET IMPLEMENTED) No compiler errors
Basic Necessity : Compilation and Error Reporting
Positive Compilation	Use the following code: package pack1; public class VarLambda {   public static void main(String[] args) { I lam = (var x) -> { // var compiles here System.out.println(x); }; lam.apply(20); } }   interface I { public void apply(Integer k); }	Code compiles
Compiler Error Case 1	package pack1; public class VarLambdaErr {   public static void main(String[] args) { I lam = (var x, z) -> { // should not mix with type-elided params System.out.println(x); }; lam.apply(20); } }   interface I { public void apply(Integer k, Integer z); }	Compiler errors are shown
Compiler Error Case 2	package pack1; public class VarLambdaErr {   public static void main(String[] args) { I lam = (var x, Integer z) -> { // should not mix with non-var params System.out.println(x); }; lam.apply(20, 200); } }   interface I { public void apply(Integer k, Integer z); }	Compiler errors are shown
Essential Utilities: Code Completion, Hover and Quick Fix.
Basic context based var completion		TODO
More to come in Java 11 !