diff --git a/clients/algoliasearch-client-java/algoliasearch/build.gradle b/clients/algoliasearch-client-java/algoliasearch/build.gradle
index bbfdc98a60d..dee0f4f5aa7 100644
--- a/clients/algoliasearch-client-java/algoliasearch/build.gradle
+++ b/clients/algoliasearch-client-java/algoliasearch/build.gradle
@@ -8,11 +8,6 @@ repositories {
     mavenCentral()
 }
 
-java {
-  sourceCompatibility = JavaVersion.VERSION_1_8
-  targetCompatibility = JavaVersion.VERSION_1_8
-}
-
 dependencies {
     implementation 'com.google.code.findbugs:jsr305:3.0.2'
     api 'com.squareup.okhttp3:okhttp:4.11.0'
@@ -23,9 +18,10 @@ dependencies {
     implementation 'org.openapitools:jackson-databind-nullable:0.2.6'
 }
 
-tasks.withType(JavaCompile) {
+tasks.withType(JavaCompile).configureEach {
     options.encoding = 'UTF-8'
     options.compilerArgs += ['-Xlint:deprecation', '-Xlint:unchecked', '-Xlint:cast', '-Xlint:rawtypes']
+    options.release = 8
 }
 
 javadoc {
diff --git a/clients/algoliasearch-client-java/gradle/wrapper/gradle-wrapper.jar b/clients/algoliasearch-client-java/gradle/wrapper/gradle-wrapper.jar
index 1b33c55baab..8bdaf60c75a 100644
Binary files a/clients/algoliasearch-client-java/gradle/wrapper/gradle-wrapper.jar and b/clients/algoliasearch-client-java/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/clients/algoliasearch-client-java/gradle/wrapper/gradle-wrapper.properties b/clients/algoliasearch-client-java/gradle/wrapper/gradle-wrapper.properties
index d4081da476b..2a84e188b85 100644
--- a/clients/algoliasearch-client-java/gradle/wrapper/gradle-wrapper.properties
+++ b/clients/algoliasearch-client-java/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.0.0-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/clients/algoliasearch-client-java/gradlew b/clients/algoliasearch-client-java/gradlew
index 23d15a93670..ef07e0162b1 100755
--- a/clients/algoliasearch-client-java/gradlew
+++ b/clients/algoliasearch-client-java/gradlew
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 #
-# Copyright © 2015-2021 the original authors.
+# Copyright © 2015 the original authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/clients/algoliasearch-client-kotlin/gradle/wrapper/gradle-wrapper.jar b/clients/algoliasearch-client-kotlin/gradle/wrapper/gradle-wrapper.jar
index 1b33c55baab..8bdaf60c75a 100644
Binary files a/clients/algoliasearch-client-kotlin/gradle/wrapper/gradle-wrapper.jar and b/clients/algoliasearch-client-kotlin/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/clients/algoliasearch-client-kotlin/gradle/wrapper/gradle-wrapper.properties b/clients/algoliasearch-client-kotlin/gradle/wrapper/gradle-wrapper.properties
index d4081da476b..2a84e188b85 100644
--- a/clients/algoliasearch-client-kotlin/gradle/wrapper/gradle-wrapper.properties
+++ b/clients/algoliasearch-client-kotlin/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.0.0-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/clients/algoliasearch-client-kotlin/gradlew b/clients/algoliasearch-client-kotlin/gradlew
index 23d15a93670..ef07e0162b1 100755
--- a/clients/algoliasearch-client-kotlin/gradlew
+++ b/clients/algoliasearch-client-kotlin/gradlew
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 #
-# Copyright © 2015-2021 the original authors.
+# Copyright © 2015 the original authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/config/clients.config.json b/config/clients.config.json
index c2f3ea13139..4d989e676a3 100644
--- a/config/clients.config.json
+++ b/config/clients.config.json
@@ -131,8 +131,8 @@
     "supportedVersions": [
       "8",
       "11",
-      "21",
-      "17"
+      "17",
+      "21"
     ]
   },
   "javascript": {
diff --git a/gradle/gradle/wrapper/gradle-wrapper.jar b/gradle/gradle/wrapper/gradle-wrapper.jar
index a4b76b9530d..8bdaf60c75a 100644
Binary files a/gradle/gradle/wrapper/gradle-wrapper.jar and b/gradle/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/gradle/wrapper/gradle-wrapper.properties b/gradle/gradle/wrapper/gradle-wrapper.properties
index d4081da476b..2a84e188b85 100644
--- a/gradle/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.0.0-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
diff --git a/scripts/buildLanguages.ts b/scripts/buildLanguages.ts
index bd19a362dc7..3bfdb5603ee 100644
--- a/scripts/buildLanguages.ts
+++ b/scripts/buildLanguages.ts
@@ -68,10 +68,8 @@ async function buildLanguage(language: Language, gens: Generator[], buildType: B
     case 'java':
     case 'kotlin':
       // the playground specify search but it will still build everything
-      await run(
-        `./gradle/gradlew -p ${cwd} ${buildType === 'client' || buildType === 'playground' ? 'assemble -Pclient=Search' : 'build'}`,
-        { language },
-      );
+      const isTestClass = buildType === 'guides' || buildType === 'snippets';
+      await run(`./gradle/gradlew -p ${cwd} ${isTestClass ? 'testClasses' : 'assemble'} ${language == 'kotlin' ? '-Pclient=Search' : ''}`, { language });
       break;
     case 'php':
       // await runComposerInstall();
diff --git a/templates/java/snippets/build.mustache b/templates/java/snippets/build.mustache
index 9c608c2f20f..0472daec393 100644
--- a/templates/java/snippets/build.mustache
+++ b/templates/java/snippets/build.mustache
@@ -12,8 +12,8 @@ dependencies {
 
 java {
     toolchain {
-        languageVersion = JavaLanguageVersion.of(17)
-        vendor = JvmVendorSpec.ADOPTIUM
+        languageVersion = JavaLanguageVersion.of({{languageVersion}})
+        vendor = JvmVendorSpec.AZUL
     }
 }
 
diff --git a/templates/java/tests/build.mustache b/templates/java/tests/build.mustache
index d3d241d6d11..f87f7b41db8 100644
--- a/templates/java/tests/build.mustache
+++ b/templates/java/tests/build.mustache
@@ -9,7 +9,7 @@ repositories {
 java {
     toolchain {
         languageVersion = JavaLanguageVersion.of({{languageVersion}})
-        vendor = JvmVendorSpec.ADOPTIUM
+        vendor = JvmVendorSpec.AZUL
     }
 }
 
@@ -33,4 +33,4 @@ test() {
 		events "passed", "skipped", "failed"
         showStandardStreams = true
 	}
-}
\ No newline at end of file
+}
diff --git a/tests/output/java/settings.gradle b/tests/output/java/settings.gradle
index e0ccea1d922..babe5e769a1 100644
--- a/tests/output/java/settings.gradle
+++ b/tests/output/java/settings.gradle
@@ -1,5 +1,5 @@
 plugins {
-    id 'org.gradle.toolchains.foojay-resolver-convention' version '0.8.0'
+    id 'org.gradle.toolchains.foojay-resolver-convention' version '1.0.0'
 }
 
 rootProject.name = 'java-tests'