Error:Execution failed for task ':app:compileDebugJavaWithJavac'. > Compilation failed; see the comp

1.错误描述

Error:Execution failed for task ':app:compileDebugJavaWithJavac'.
> Compilation failed; see the compiler error output for details.

2. 错误原因

编译有问题，看到complieDubugJavaWithJavac,看到javac，难得与jdk版本有关；

AndroidStudio -> Terminal ->输入：gradlew compileDebugSources --stacktrace -info

打印错误信息如下：

* Exception is:
java.lang.IllegalArgumentException: Could not determine java version from '12.0.1'.
        at org.gradle.api.JavaVersion.toVersion(JavaVersion.java:70)
        at org.gradle.api.JavaVersion.current(JavaVersion.java:80)
        at org.gradle.internal.jvm.UnsupportedJavaRuntimeException.assertUsingVersion(Unsuppo
rtedJavaRuntimeException.java:29)
        at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationA
ction.java:32)
        at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationA
ction.java:24)

Could not determine java version from '12.0.1'看出系统中jdk12.0.1应该与AndroidStudio内项目jdk版本不一致，运行出错；

3. 解决方案

1. 选中项目-> File -> Project Structure -> SDK Location ->Use embedded JDK是项目使用jre路径，

2. dos命令进入这个jre路径，然后输入javac -version,获取到AndroidStudio需要的jdk版本；

3. 直接打开dos窗口输入javac -version,获取系统的jdk版本，

4. 如果两者不一致，重新安装一个低于AndroidStudio需要的jdk版本，并设置到系统环境变量中去；