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Java12/Examples
Revision as of 06:10, 18 March 2019 by Lshanmug.in.ibm.com (Talk | contribs)
= NOTE: THE PAGE IS UNDER CONSTRUCTION
This is an informal page listing examples of features that are implemented by the Java 12 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 12 JRE Support | |||
| Add Java 12 JRE | Use Window -> Preferences-> Java -> Installed JREs -> Add...
|
Java 12 JRE recognized as a valid JRE | |
| Project JRE | In Package Explorer Use project's context menu and add Java 12 JRE | JRE specific (eg Object) gets resolved in the project. | |
| Package Explorer | Go to Package Explorer and expand the Java 12 JRE | Modules (eg java.base etc) are listed in the package explorer view | |
| The First Step: Java 12 Compliance | |||
| Set Project Compliance in Package Explorer | Context Menu of Project -> Properties -> Set project-specific, drop down to 12
|
12 is shown in the drop down list | Select the checkbox to enable preview features. |
| No compiler errors | |||
| Basic Necessity : Compilation and Error Reporting | |||
| Positive Compilation | Use the following code:
package j12.preview; public class Test { enum Day { MON, TUE, WED, THUR, FRI, SAT, SUN }; @SuppressWarnings("preview") public String getDay (Day today) { String day = switch(today) { case MON, TUE, WED, THUR, FRI -> "Weekday"; case SAT, SUN -> "Weekend"; }; return day; } }
|
Code compiles | |
| Compiler Error Cases |
|
Compiler errors are shown | |
