Test, and will not affect the operation!
Get rid of the red line!
file - seting - java compiler - the two version were changed to 1.8 (because my jdk 1.8)!
file - project struture - modules - language level -- 8 !
These two steps are removed!
Test, and will not affect the operation!
Get rid of the red line!
file - seting - java compiler - the two version were changed to 1.8 (because my jdk 1.8)!
file - project struture - modules - language level -- 8 !
These two steps are removed!