Error:java: 无效的源发行版: 1.9
Information:java: Errors occurred while compiling module ‘lucene-first’
Information:javac 1.8.0_162 was used to compile java sources
Information:Module “lucene-first” was fully rebuilt due to project configuration/dependencies changes
Information:2020/5/21 22:10 - Compilation completed with 1 error and 0 warnings in 2s 421ms
Error:java: 无效的源发行版: 1.9
出现这种问题解决方法:
第一步，在IDEA右上角有一个这个，点击
可以看到这里是9-Module，但这里的JDK是1.8
因为版本不一致，所以报错，要么把这里改成8，要么把jdk改成1.9，我这里是改成8了