[IDEA] Maven Run Project Error: Diamond operator is not supported in – source 1.5″

Error running project on idea “The diamond operator is not supported in – source 1.5”, because lambda expressions, a new feature in Java 8, have been used in the project. Of course, the syntax of 1.5 is not supported.


1. Ensure that the bytecode compilation version in Java compiler in setting in idea is 8

2. Modify the language level of the module in the project structure to 8.

3. Check the pom.xml file of Maven project to see if the following attributes are added.


Similar Posts: