gradle java9无法定位平台：'Java SE 9'使用工具链：'JDK 8（1.8）' [英] gradle java9 Could not target platform: 'Java SE 9' using tool chain: 'JDK 8 (1.8)'

问题描述

我想在eclipse氧气里面的gradle项目中使用java9。当我
运行时：

 运行为> GreeterTest.java上的Gradle测试
  

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; 
 
类GreeterTest {
 
 @Test 
 void test（）{
 Greeter greeter = new Greeter（）; 
 assertEquals（Hello world，greeter.sayHello（））; 
} 
} 
  

并且我测试的类为：

  package hello; 
 
公共类Greeter {
 public String sayHello（）{
 returnHello world！; 
} 
} 
  

我收到错误消息

无法定位平台：'Java SE 9'使用
工具链：'JDK 8（1.8）'。

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_\1.1.550.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.sm allFonts 
 -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/或者是.gclipse./ a href =https://i.stack.imgur.com/odTl9.png =noreferrer>我添加了JAVA_HOME  
 
 
 
 < a href =https://i.stack.imgur.com/y46c8.png =noreferrer>我添加了构建路径 
 
 
 
 我已更改编译参数 
 
 
我在Build.Gradle中设置了编译参数。
 
 
 
 
 
  buildscript {
r epositories {
 mavenCentral（）
} 
依赖项{
 classpath'org.junit.platform：junit-platform-gradle-plugin：1.0.2'
} 
} 
 
存储库{
 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 {
 //平台ormVersion'1.0.2'
过滤{
引擎{
 //包括'junit-jupiter'，'junit-vintage'
 //排除'custom-engine'
} 
标签{
 //包括'快'
排除'慢'
} 
 // includeClassNamePattern'。*测试'
} 
 // configurationParameter'junit.jupiter.conditions.deactivate'，'*'
 // enableStandardTestTask true 
 // reportsDir文件（'build / test-results / junit-platform'）//这是默认的
 logManager'org.apache.logging.log4j.jul.LogManager'
} 
 
依赖项{
 // JUnit Jupiter API和TestEngine实现
 testCompile（org.junit.jupiter：junit-jupiter-api：$ {junitJupiterVersion}）
 testRuntime（org.junit.jupiter：junit-jupiter-engine：$ {junitJupiterVersion}）
 
 //如果你还想支持JUnit 3和JUnit 4测试
 te stCompile（junit：junit：$ {junit4Version}）
 testRuntime（org.junit.vintage：junit-vintage-engine：$ {junitVintageVersion}）
 
 //要避免关于JUnit代码中的@API注释的编译器警告
 //testCompileOnly('org.apiguardian:apiguardian-api:1.0.0'）
 
 //使用Log4J的LogManager 
 testRuntime （org.apache.logging.log4j：log4j-core：$ {log4jVersion}）
 testRuntime（org.apache.logging.log4j：log4j-jul：$ {log4jVersion}）
 
 //只需要在捆绑旧版本的（IntelliJ）IDE（A）中运行测试
 testRuntime（org.junit.platform：junit-platform- launcher：$ {junitPlatformVersion}）
} 
 
任务包装器（类型：包装器）{
 description ='生成gradlew [.bat]脚本'
 gradleVersion ='4.1'
} 
  
 
 
 
 
 
我该怎么办才能让它运行？
 
 
 
 
解决方案
你可能应该尝试更新系统变量中的 JAVA_HOME 和
 eclipse中使用的Java版本与
 
 
 $ b 
  JAVA_HOME = / path / to / jdk9 
  
在MacOSX中，有些东西喜欢：
  JAVA_HOME = /Library/Java/JavaVirtualMachines/jdk-9.0.1.jdk/Contents/Home/bin 
  
 as 在评论中通知，Linux上的默认路径为： 
  / usr / lib / jvm / java-9-openjdk 
  
 
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?

解决方案
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


                        
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