Upgrade minimum Java version to Java 17

.github/workflows/test-publish.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [ '14', '17', '20', '21' ]
+        java: [ '17', '20', '21' ]
     steps:
       - uses: actions/checkout@v3
 

README.md

@@ -161,7 +161,7 @@ repository is an auto-built version of the handout.
 
 ## Contributing
 The main tools for development are the same as the students' dependencies — Java
-14 and Python 3. You will also need a few utilities such as `wget` to build with
+17 and Python 3. You will also need a few utilities such as `wget` to build with
 the provided `Makefile`; MacOS users will need `gtar` and `gcp` provided by the
 `coreutils` Homebrew package.
 

build.gradle

@@ -9,8 +9,8 @@ import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
 import com.github.jk1.license.render.TextReportRenderer
 
 java {
-  sourceCompatibility = '14'
-  targetCompatibility = '14'
+  sourceCompatibility = '17'
+  targetCompatibility = '17'
 }
 
 sourceSets {

handout-files/Makefile

@@ -1,7 +1,7 @@
 ################################################################################
 # Java compiler settings
 ################################################################################
-JC = javac -source 14 -g
+JC = javac -source 17 -g
 
 
 ################################################################################

handout-files/README.md

@@ -102,7 +102,7 @@ and/or failures that might lead to a violation of the invariants of the system.
 
 
 ## Getting Started
-The only dependency for these labs is Java 14. Installing `openjdk-14-jdk` on
+The only dependency for these labs is Java 17+. Installing `openjdk-17-jdk` on
 most Linux distros should be sufficient.
 
 We recommend using IntelliJ (a configuration directory is included in each
@@ -117,13 +117,13 @@ In order to run the tests from the terminal, you will need Python 3 and Make.
 
 ### Command-line Tools On Windows
 We do not recommend using Windows. It is possible, however. You will need to
-install `make`, Python 3, and Java 14. You can do this on native Windows.
+install `make`, Python 3, and Java 17. You can do this on native Windows.
 However, installing a Windows Subsystem for Linux will make installing and
 running the command-line tools much easier (though it will potentially make
 running the visual debugger more difficult depending on your version of Windows
 and WSL; see below).
 
-If you install WSL, you can install `python3`, `java14`, and `make` through
+If you install WSL, you can install `python3`, `java17`, and `make` through
 `apt-get`. You will still need to install Java directly on Windows, though, for
 IntelliJ. (This will result in two installations of Java.)