gradle java9 无法定位平台：'Java SE 9' 使用工具链：'JDK 8 (1.8)'
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gradle java9 Could not target platform: 'Java SE 9' using tool chain: 'JDK 8 (1.8)'
提问by stein korsveien
I want to use java9 on my gradle project inside eclipse oxygen. When I run:
我想在 eclipse Oxy 中的 gradle 项目中使用 java9。当我运行时：
Run as> Gradle Test on GreeterTest.java
with the following code:
使用以下代码：
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:
和我测试的类：
package hello;
public class Greeter {
public String sayHello() {
return "Hello world!";
}
}
I get the error message
我收到错误消息
Could not target platform: 'Java SE 9' using tool chain: 'JDK 8 (1.8)'.
无法定位平台：“Java SE 9”使用工具链：“JDK 8 (1.8)”。
My eclipse.init is
我的 eclipse.init 是
-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_.1.550.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 [email protected]/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/
-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_.1.550.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 [email protected]/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 change the compile parameter
I have set the compile parameter in the Build.Gradle.
我已经在 Build.Gradle 中设置了 compile 参数。
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?
我必须做什么才能让它运行？
回答by chenrui
From what I can see, it is the Gradle version issue. (Gradle and Java 9 compatibility issue).
据我所知，这是 Gradle 版本问题。（Gradle 和 Java 9 兼容性问题）。
You need to upgrade the wrapper to 4.3.1, cli ref:
您需要将包装器升级到 4.3.1，cli 参考：
# upgrade Gradle to 4.3.1
gradle wrapper --gradle-version 4.3.1 # not ./gradlew
Let me know if that works.
让我知道这是否有效。
回答by Naman
You should probably try to update your JAVA_HOMEin system variables and
Java version used in eclipse to be consistent to
您可能应该尝试更新JAVA_HOME系统变量和 eclipse 中使用的 Java 版本以与
JAVA_HOME=/path/to/jdk9
In MacOSX, something like :
在 MacOSX 中，类似于：
JAVA_HOME = /Library/Java/JavaVirtualMachines/jdk-9.0.1.jdk/Contents/Home/bin
As informed in comments, the default path on Linux would be :
如评论中所述，Linux 上的默认路径为：
/usr/lib/jvm/java-9-openjdk
回答by stein korsveien
I changed the java_homeand upgraded Gradle. Now it is working.
我更改java_home并升级了 Gradle。现在它正在工作。
回答by tonisives
For me the problem was that I used
对我来说，问题是我用过
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.
但该项目是为 Java 1.8 配置的。所以我将这些更改为 1_8 并且它有效。
回答by Igor Nosovsky
I faced the issue because in IntelliJ Idea in the Settings > Build Tools > Gradle In "Gradle" section, Gradlje JVM used an incorrect Java version. So I specify to use JAVA_HOME and it fixes the issue.
我遇到了这个问题，因为在“设置”>“构建工具”>“Gradle”部分的 IntelliJ Idea 中，Gradlje JVM 使用了不正确的 Java 版本。所以我指定使用 JAVA_HOME 并解决了这个问题。
回答by parrotHyman
I faced the same error with different JDK version, so i used the following code which works fine.
我在使用不同的 JDK 版本时遇到了同样的错误，所以我使用了以下代码，效果很好。
compileJava {
options.fork = true
options.forkOptions.javaHome = file('/Library/Java/JavaVirtualMachines/jdk-11.0.5.jdk/Contents/Home')
targetCompatibility = 11
sourceCompatibility = 11
}
