Unsupported class file major version (Gradle / Java) Flutter / Dart Origin: On your device Last updated 4 Nov 2026

Android Gradle: Execution failed — Unsupported class file major version 65 / Android Gradle plugin requires Java 17 to run

Gradle or the Android Gradle plugin is running on a Java version it does not support.

Exact message you may see Unsupported class file major version 65Unsupported class file major version 61Android Gradle plugin requires Java 17 to run. You are currently using Java 11Could not resolve all files for configuration ':classpath' Java versionYour project's Gradle version is incompatible with the Java version
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Seen on: Flutter Android Java

Meaning

Class version 65 = Java 21, 61 = Java 17, 55 = Java 11. Match the JDK to the Gradle/AGP versions: AGP 8.x needs JDK 17. Set JAVA_HOME (or flutter config --jdk-dir) to JDK 17, or upgrade Gradle to support the newer JDK.

Common causes

  • JDK too new for the Gradle version
  • JDK too old for AGP 8 (needs 17)
  • Multiple JDKs and wrong JAVA_HOME
  • Android Studio's bundled JDK vs system JDK differences
  • gradle-wrapper.properties pointing to an old Gradle

⚡ Quick fix

  1. flutter config --jdk-dir <path-to-jdk17>
  2. Upgrade Gradle wrapper to a version supporting your JDK
  3. Set JAVA_HOME and re-run flutter doctor -v

Detailed fix by platform

Flutter

  1. flutter config --jdk-dir "/Applications/Android Studio.app/Contents/jbr/Contents/Home"

How to diagnose

  1. Class version — Which Java?
  2. Gradle — Wrapper version?
  3. JAVA_HOME — Correct?

🔧 Still not fixed?

Many errors look alike. If the steps above didn’t solve it, one of these is probably what you’re facing:

Where this error sits

Origin: On your device. Errors that are often confused with or caused by this one (click to open):

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