set toolchain target version

Author: rheimus

build-gui/build.gradle

@@ -27,6 +27,12 @@ dependencies {
     implementation "org.openjfx:javafx-controls:$javafx.version:mac"
 }
 
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(java_language_version)
+    }
+}
+
 application {
     mainClass = ss_main_class
 }

build-server/build.gradle

@@ -20,6 +20,12 @@ dependencies {
     implementation fileTree(dir: "libs", include: "*.jar")
 }
 
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(java_language_version)
+    }
+}
+
 jar {
     enabled = false
 }

build-shared/build.gradle

@@ -19,6 +19,12 @@ dependencies {
     testRuntimeOnly "org.junit.jupiter:junit-jupiter-engine:5.8.2", "com.eclipsesource.minimal-json:minimal-json:0.9.5"
 }
 
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(java_language_version)
+    }
+}
+
 jar {
     archiveBaseName = "server-sync"
     archiveClassifier = "shared"