Update to 21w19a and Java 16

This commit can be used as an example on how to update your mod to Java 16. You will need to ensure you have Java 16 installed and set as the active version to run this.

Gradle 7 is required along with loom 0.8

.github/workflows/build.yml

@@ -12,9 +12,7 @@ jobs:
       matrix:
         # Use these Java versions
         java: [
-          1.8,  # Minimum supported by Minecraft
-          11,   # Current Java LTS
-          15    # Latest version
+          16    # Minimum supported by Minecraft
         ]
         # and run on both Linux and Windows
         os: [ubuntu-20.04, windows-latest]
@@ -34,7 +32,7 @@ jobs:
       - name: build
         run: ./gradlew build
       - name: capture build artifacts
-        if: ${{ runner.os == 'Linux' && matrix.java == '11' }} # Only upload artifacts built from LTS java on one OS
+        if: ${{ runner.os == 'Linux' && matrix.java == '16' }} # Only upload artifacts built from latest java on one OS
         uses: actions/upload-artifact@v2
         with:
           name: Artifacts

build.gradle

@@ -1,10 +1,10 @@
 plugins {
-	id 'fabric-loom' version '0.6-SNAPSHOT'
+	id 'fabric-loom' version '0.8-SNAPSHOT'
 	id 'maven-publish'
 }
 
-sourceCompatibility = JavaVersion.VERSION_1_8
-targetCompatibility = JavaVersion.VERSION_1_8
+sourceCompatibility = JavaVersion.VERSION_16
+targetCompatibility = JavaVersion.VERSION_16
 
 archivesBaseName = project.archives_base_name
 version = project.mod_version
@@ -46,13 +46,8 @@ tasks.withType(JavaCompile).configureEach {
 	// If Javadoc is generated, this must be specified in that task too.
 	it.options.encoding = "UTF-8"
 
-	// The Minecraft launcher currently installs Java 8 for users, so your mod probably wants to target Java 8 too
-	// JDK 9 introduced a new way of specifying this that will make sure no newer classes or methods are used.
-	// We'll use that if it's available, but otherwise we'll use the older option.
-	def targetVersion = 8
-	if (JavaVersion.current().isJava9Compatible()) {
-		 it.options.release = targetVersion
-	}
+	// Minecraft 1.17 (21w19a) upwards uses Java 16.
+	it.options.release = 16
 }
 
 java {

gradle.properties

@@ -3,8 +3,8 @@ org.gradle.jvmargs=-Xmx1G
 
 # Fabric Properties
 	# check these on https://fabricmc.net/use
-	minecraft_version=1.16.5
-	yarn_mappings=1.16.5+build.6
+	minecraft_version=21w19a
+	yarn_mappings=21w19a+build.1
 	loader_version=0.11.3
 
 # Mod Properties
@@ -14,4 +14,4 @@ org.gradle.jvmargs=-Xmx1G
 
 # Dependencies
 	# currently not on the main fabric site, check on the maven: https://maven.fabricmc.net/net/fabricmc/fabric-api/fabric-api
-	fabric_version=0.32.5+1.16
+	fabric_version=0.34.4+1.17

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.8.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0.1-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

src/main/resources/fabric.mod.json

@@ -27,9 +27,10 @@
   ],
 
   "depends": {
-    "fabricloader": ">=0.7.4",
+    "fabricloader": ">=0.11.3",
     "fabric": "*",
-    "minecraft": "1.16.x"
+    "minecraft": "1.17.x",
+    "java": ">=16"
   },
   "suggests": {
     "another-mod": "*"

src/main/resources/modid.mixins.json

@@ -2,7 +2,7 @@
   "required": true,
   "minVersion": "0.8",
   "package": "net.fabricmc.example.mixin",
-  "compatibilityLevel": "JAVA_8",
+  "compatibilityLevel": "JAVA_16",
   "mixins": [
   ],
   "client": [