这是我的输出gradle -v
(在使用包装器的项目中):
$ ./gradlew -v
------------------------------------------------------------
Gradle 5.0
------------------------------------------------------------
Build time: 2018-11-26 11:48:43 UTC
Revision: 7fc6e5abf2fc5fe0824aec8a0f5462664dbcd987
Kotlin DSL: 1.0.4
Kotlin: 1.3.10
Groovy: 2.5.4
Ant: Apache Ant(TM) version 1.9.13 compiled on July 10 2018
JVM: 11.0.1 (Oracle Corporation 11.0.1+13-LTS)
OS: Linux 3.10.0-862.11.6.el7.x86_64 amd64
特别参见这一行:
JVM: 11.0.1 (Oracle Corporation 11.0.1+13-LTS)
我希望切换到 OpenJDK 11。因此选择它,如下所示:
# alternatives --config java
There are 4 programs which provide 'java'.
Selection Command
-----------------------------------------------
* 1 /usr/java/jdk-11.0.1/bin/java
+ 2 /usr/local/jdk-11.0.1/bin/java
3 /usr/java/jre1.8.0_191-i586/bin/java
4 /usr/java/jdk1.8.0_191-amd64/jre/bin/java
Enter to keep the current selection[+], or type selection number: 2
# java -version
openjdk version "11.0.1" 2018-10-16
OpenJDK Runtime Environment 18.9 (build 11.0.1+13)
OpenJDK 64-Bit Server VM 18.9 (build 11.0.1+13, mixed mode)
但没有什么区别gradle -v
输出。所以我在网上搜索并找到了一些方法(参见here):
Editing gradle.properties
file
Using -Dorg.gradle.java.home
命令行选项
Editing build.gradle
file
我用的是前两种方式。两者都有效(为了测试我切换到JDK 8
然后运行build
任务。由于 Java 8 不支持我的代码中的一些新功能,该任务失败了。但的结果gradle -v
依然保持不变!即使使用第二种方式:
# ./gradlew -Dorg.gradle.java.home=/usr/java/jdk1.8.0_191-amd64 -v
------------------------------------------------------------
Gradle 5.0
------------------------------------------------------------
Build time: 2018-11-26 11:48:43 UTC
Revision: 7fc6e5abf2fc5fe0824aec8a0f5462664dbcd987
Kotlin DSL: 1.0.4
Kotlin: 1.3.10
Groovy: 2.5.4
Ant: Apache Ant(TM) version 1.9.13 compiled on July 10 2018
JVM: 11.0.1 (Oracle Corporation 11.0.1+13-LTS)
OS: Linux 3.10.0-862.11.6.el7.x86_64 amd64
所以问题是如何检查 Gradle 使用的 JDK 版本build
过程?