我尝试在 Mac 上的 IntelliJ 上构建我的项目时遇到了这样的错误。
Error:(12, 39) java: diamond operator is not supported in -source 1.5
(use -source 7 or higher to enable diamond operator)
Error:(122, 48) java: method references are not supported in -source 1.5
(use -source 8 or higher to enable method references)
Error:(124, 51) java: lambda expressions are not supported in -source 1.5
(use -source 8 or higher to enable lambda expressions)
查看本站其他答案，与项目语言水平太低有关。但是，我的设置如下:
似乎我选择了正确的选项，但我仍然遇到同样的错误。我该如何解决这些问题。
如果我使用 JDK 11.0.1，这是日志的第一部分:
Information:java: JPS build failed to load optimized file manager for javac:
java.lang.NoClassDefFoundError: com/sun/tools/javac/util/DefaultFileManager
java.lang.NoClassDefFoundError: com/sun/tools/javac/file/JavacFileManager
Information:java: Errors occurred while compiling module 'notification-processor'
Information:javac 8 was used to compile java sources
Information:Module "notification-processor" was fully rebuilt due to project configuration/dependencies changes
Information:2018-11-07, 4:38 PM - Compilation completed with 19 errors and 4 warnings in 3 s 490 ms
Warning:java: class org.jetbrains.jps.javac.ast.ExternalRefCollectorCompilerToolExtension : com/sun/source/util/TaskListener
Warning:java: source value 1.5 is obsolete and will be removed in a future release
Warning:java: target value 1.5 is obsolete and will be removed in a future release
Warning:java: To suppress warnings about obsolete options, use -Xlint:-options.
如果我使用 JDK 8，这是日志的第一部分:
Information:java: Errors occurred while compiling module 'notification-processor'
Information:javac 1.8.0_191 was used to compile java sources
Information:Module "notification-processor" was fully rebuilt due to project configuration/dependencies changes
Information:2018-11-07, 4:39 PM - Compilation completed with 19 errors and 3 warnings in 2 s 858 ms
Warning:java: source value 1.5 is obsolete and will be removed in a future release
Warning:java: target value 1.5 is obsolete and will be removed in a future release
Warning:java: To suppress warnings about obsolete options, use -Xlint:-options.
最佳答案
请确保您没有覆盖模块设置中的语言级别:
和编译器设置
关于java - 无法解决 IntelliJ 上关于项目语言级别的源错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/53198264/