build: bump to Java 17

1 files changed, 13 insertions, 16 deletions

diff --git a/README.md b/README.md
index 4b1389ff..a42acfa2 100644
--- a/README.md
+++ b/README.md
@@ -6,34 +6,31 @@
 
 ### With Eclipse IDE
 
-1. Download and install a _Java 11_ compatible JDK. For Windows, prefer OpenJDK builds from [Adoptium](https://adoptium.net/).
+1. Download and install a _Java 17_ compatible JDK. For Windows, prefer OpenJDK builds from [Adoptium](https://adoptium.net/).
 
-2. Download and extract the [Eclipse Modeling Tools 2021-09](https://www.eclipse.org/downloads/packages/release/2021-09/r/eclipse-modeling-tools) package.
+2. Download and extract the [Eclipse IDE for Java and DSL Developers 2021-09](https://www.eclipse.org/downloads/packages/release/2021-09/r/eclipse-ide-java-and-dsl-developers) package.
 
 3. Launch Eclipse and create a new workspace.
 
-4. Switch to the _Java_ perspective and close the _Modeling_ perspective.
-
-5. Open _Help > Install New Software..._ and install the following software from the _2021-09_ update site:
+4. Open _Help > Install New Software..._ and install the following software from the _2021-09_ update site:
     * _Modeling > Ecore Diagram Editor (SDK)_
-    * _Modeling > Xtext Complete SDK_
-    * _Programming Languages > Xtend IDE_
 
-6. Open _Help > Eclipse Marketplace_ and install _Buildship Gradle Integration_.
+5. Open _Help > Eclipse Marketplace_ and install the following software:
+    * _Java 17 Support for Eclipse 2021-09_
+    * _SonarLint_
 
-7. Open _Window > Preferences_ and set the following preferences:
+6. Open _Window > Preferences_ and set the following preferences:
     * _General > Workspace > Text file encoding_ should be _UTF-8_.
     * _General > Workspace > New text file line delimiter_ should be _Unix_.
-    * Add the JDK 11 to _Java > Installed JREs_.
-    * Make sure JDK 11 is selected for _JavaSE-11_ at _Java > Installed JREs > Execution Environments_.
-    * Set _Gradle > Java home_ to the `JAVA_HOME` directory (the directory which contains the `bin` directory) of JDK 11.
-      Buildship will show a yellow warning sign, which can be safely ignored.
+    * Add the JDK 17 to _Java > Installed JREs_.
+    * Make sure JDK 17 is selected for _JavaSE-17_ at _Java > Installed JREs > Execution Environments_.
+    * Set _Gradle > Java home_ to the `JAVA_HOME` directory (the directory which contains the `bin` directory) of JDK 17. Here, Buildship will show a yellow warning sign, which can be safely ignored.
           
-8. Clone the project Git repository but do not import it into Eclipse.
+7. Clone the project Git repository but do not import it into Eclipse yet.
 
-9. Open a new terminal an run `./gradlew build` (`.\gradlew build` on Windows) in the cloned repository. This should complete without any compilation error.
+8. Open a new terminal an run `./gradlew build` (`.\gradlew build` on Windows) in the cloned repository. This should complete without any compilation errors. If you get any errors about the JVM version, check whether the `JAVA_HOME` environment variable is set to the location of JDK. You can query the variable with `echo $JAVA_HOME` on Linux and `echo $Env:JAVA_HOME` in PowerShell on Windows. To set it, use `export JAVA_HOME=/java/path/here` or `$Env:JAVA_HOME="C:\java\path\here"`, respectively.
 
-10. Select _File > Import... > Gradle > Existing Gradle Project_ and import the cloned repository in Eclipse.
+9. Select _File > Import... > Gradle > Existing Gradle Project_ and import the cloned repository in Eclipse.
   Make sure to select the root of the repository (containing this file) as the _Project root directory_ and that the _Gradle distribution_ is _Gradle wrapper_.
   If you have previously imported the project into Eclipse, this step will likely fail.
   In that case, you can remove the projects from Eclipse, run `git clean -fxd` in the repository, and start over from step 9.