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ViewsIntelliJ - Invalid source release: 17
I've created a new Java project in IntelliJ with Gradle that uses Java 17. When running my app it has the error Cause: error: invalid source release: 17.
My Settings
I've installed openjdk-17 through IntelliJ and set it as my Project SDK.
The Project language level has been set to 17 - Sealed types, always-strict floating-point semantics.
In Modules -> Sources I've set the Language level to Project default (17 - Sealed types, always strict floating-point semantics).
In Modules -> Dependencies I've set the Module SDK to Project SDK openjdk-17.
In Settings -> Build, Execution, Deployment -> Compiler -> Java Compiler I've set the Project bytecode version to 17.
Gradle
plugins {
id 'org.springframework.boot' version '2.5.6'
id 'io.spring.dependency-management' version '1.0.11.RELEASE'
id 'java'
}
group = 'com.app'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '17'
repositories {
mavenCentral()
}
dependencies {
implementation 'org.springframework.boot:spring-boot-starter-web'
implementation 'org.springframework.boot:spring-boot-starter-websocket'
testImplementation 'org.springframework.boot:spring-boot-starter-test'
implementation 'com.fasterxml.jackson.core:jackson-core:2.13.0'
implementation 'com.fasterxml.jackson.core:jackson-databind:2.13.0'
}
test {
useJUnitPlatform()
}
I've looked at all of the answers here but I can't seem to fix this. I must be missing something but I can't find it. I've not had any problems using Java 8 or 11.
How do I resolve this?
4 answers
Answer question0
In intellij just set Gradle JVM to Java version 17.
"File -> Settings.. -> Build, Execution, Deployment -> Build Tools -> Gradle" there select your project and set Gradle JVM to your java 17.0.1
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The message typically entails that your JAVA_HOME environment variable points to a different Java version.
Here are the steps to follow:
- Close IntelliJ IDEA
- Open a terminal window and check your JAVA_HOME variable value:
- *nix system:
echo $JAVA_HOME - Windows system:
echo %JAVA_HOME%
- *nix system:
- The JAVA_HOME path should be pointing to a different path, then set it to the openjdk-17 path:
- *nix system:
export JAVA_HOME=/path/to/openjdk-17 - Windows system:
set JAVA_HOME=path\to\openjdk-17
- *nix system:
- Open your project again in IntelliJ IDEA
- Make sure to set both source and target compatibility versions (not only the
sourceCompatibility)
You should be able to build your project.
EDIT: Gradle Toolchain
You may need also to instruct Gradle to use a different JVM than the one it uses itself by setting the Java plugin toolchain to your target version:
// build.gradle
java {
toolchain {
languageVersion = JavaLanguageVersion.of(17)
}
}
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Set Gradle JVM to target build jvm
File -> Settings.. ->
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in build.gradle set sourceCompatibility = '11' not sourceCompatibility = '17'