问题
I want to use java9 on my gradle project inside eclipse oxygen. When I run:
Run as> Gradle Test on GreeterTest.java
with the following code:
package hello.test;
import static org.junit.jupiter.api.Assertions.*;
import org.junit.jupiter.api.Test;
import hello.Greeter;
class GreeterTest {
@Test
void test() {
Greeter greeter = new Greeter();
assertEquals("Hello world", greeter.sayHello());
}
}
and with the class I test as:
package hello;
public class Greeter {
public String sayHello() {
return "Hello world!";
}
}
I get the error message
Could not target platform: 'Java SE 9' using tool chain: 'JDK 8 (1.8)'.
My eclipse.init is
-startup ../Eclipse/plugins/org.eclipse.equinox.launcher_1.4.0.v20161219-1356.jar --launcher.library /Users/stein/.p2/pool/plugins/org.eclipse.equinox.launcher.cocoa.macosx.x86_64_\1.1.550.v20170928-1359 -product org.eclipse.epp.package.jee.product -showsplash org.eclipse.epp.package.common --launcher.defaultAction openFile --launcher.a/Library/Java/JavaVirtualMachines/jdk-9.0.1.jdk/Contents/Home/jre/bin -vmargs -Dosgi.requiredJavaVersion=1.9 -Dosgi.instance.area.default=@user.home/eclipse-workspace -XX:+UseG1GC -XX:+UseStringDeduplication --add-modules=ALL-SYSTEM -XstartOnFirstThread -Dorg.eclipse.swt.internal.carbon.smallFonts -Dosgi.requiredJavaVersion=1.9 -Xms256m -Xmx1024m --add-modules=ALL-SYSTEM -Xdock:icon=../Resources/Eclipse.icns -XstartOnFirstThread -Dorg.eclipse.swt.internal.carbon.smallFonts -Declipse.p2.max.threads=10 -Doomph.update.url=http://download.eclipse.org/oomph/updates/milestone/latest -Doomph.redirection.index.redirection=index:/->http://git.eclipse.org/c/oomph/org.eclipse.oomph.git/plain/setups/
I have added JAVA_HOME
I have added the build path
I have change the compile parameter
I have set the compile parameter in the Build.Gradle.
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath 'org.junit.platform:junit-platform-gradle-plugin:1.0.2'
}
}
repositories {
mavenCentral()
}
ext.junit4Version = '4.12'
ext.junitVintageVersion = '4.12.2'
ext.junitPlatformVersion = '1.0.2'
ext.junitJupiterVersion = '5.0.2'
ext.log4jVersion = '2.9.0'
apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'org.junit.platform.gradle.plugin'
jar {
baseName = 'junit5-gradle-consumer'
version = '1.0.0-SNAPSHOT'
}
compileJava {
sourceCompatibility = 9
targetCompatibility = 9
}
compileTestJava {
sourceCompatibility = 9
targetCompatibility = 9
options.compilerArgs += '-parameters'
}
junitPlatform {
// platformVersion '1.0.2'
filters {
engines {
// include 'junit-jupiter', 'junit-vintage'
// exclude 'custom-engine'
}
tags {
// include 'fast'
exclude 'slow'
}
// includeClassNamePattern '.*Test'
}
// configurationParameter 'junit.jupiter.conditions.deactivate', '*'
// enableStandardTestTask true
// reportsDir file('build/test-results/junit-platform') // this is the default
logManager 'org.apache.logging.log4j.jul.LogManager'
}
dependencies {
// JUnit Jupiter API and TestEngine implementation
testCompile("org.junit.jupiter:junit-jupiter-api:${junitJupiterVersion}")
testRuntime("org.junit.jupiter:junit-jupiter-engine:${junitJupiterVersion}")
// If you also want to support JUnit 3 and JUnit 4 tests
testCompile("junit:junit:${junit4Version}")
testRuntime("org.junit.vintage:junit-vintage-engine:${junitVintageVersion}")
// To avoid compiler warnings about @API annotations in JUnit code
//testCompileOnly('org.apiguardian:apiguardian-api:1.0.0')
// To use Log4J's LogManager
testRuntime("org.apache.logging.log4j:log4j-core:${log4jVersion}")
testRuntime("org.apache.logging.log4j:log4j-jul:${log4jVersion}")
// Only needed to run tests in an (IntelliJ) IDE(A) that bundles an older version
testRuntime("org.junit.platform:junit-platform- launcher:${junitPlatformVersion}")
}
task wrapper(type: Wrapper) {
description = 'Generates gradlew[.bat] scripts'
gradleVersion = '4.1'
}
What must I do to get this to run?
回答1:
You should probably try to update your JAVA_HOME
in system variables and
Java version used in eclipse to be consistent to
JAVA_HOME=/path/to/jdk9
In MacOSX, something like :
JAVA_HOME = /Library/Java/JavaVirtualMachines/jdk-9.0.1.jdk/Contents/Home/bin
As informed in comments, the default path on Linux would be :
/usr/lib/jvm/java-9-openjdk
回答2:
From what I can see, it is the Gradle version issue. (Gradle and Java 9 compatibility issue).
You need to upgrade the wrapper to 4.3.1, cli ref:
# upgrade Gradle to 4.3.1
gradle wrapper --gradle-version 4.3.1 # not ./gradlew
Let me know if that works.
回答3:
I changed the java_home
and upgraded Gradle. Now it is working.
回答4:
For me the problem was that I used
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_10
targetCompatibility JavaVersion.VERSION_1_10
}
but the project was configured for Java 1.8. So I changed these to 1_8 and it works.
来源:https://stackoverflow.com/questions/47500674/gradle-java9-could-not-target-platform-java-se-9-using-tool-chain-jdk-8-1