Error message
lambda expression not expected here
lambda expressions are not supported in -source 1.7 (use -source 8 or higher to enable lambda expressions)
----
(Alt-Enter shows hints)
Solution
I used an old version JDK (1.7) for the project and it does not support the underlined sytnax/expression in red. Things to do is change the JDK version to compile your project.===========================
Step 1)
Right click your project name with icon in projects explorer.
Step 2)
and select "properties".
Step 3)
Select Categories ->Sources -> Source/Binary Format, for my case using the JDK7 would causes the problem, so change it to the latest JDK (JDK8) and click OK button
Wait a moment and you may found the error message disappear.
great
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