NetBeans 12.0: “Class does not have a main method” (but it does)

NetBeans 12.0 Jdk 15 I cannot launch my program, clicking the green run button doesn’t do anything, and right click + run file on MainFrame gives the error “Class does not have a main method”…

Java generics impossible assignment?

Every time I think I understand generics better (and can answer without compiling), I get to an example where this theory breaks. Here is a very simple example: static void consumer(List<? super …

Specific JDK in eclipse.ini for Eclipse IDE version 2020-09 use JDK 15, not default JDK what declared in system environment variable

Eclipse 2020-09, Error: Version 1.8.0_261 of the JVM is not suitable for this product. Version: 11 or greater is required. I must set Java environment to JDK 1.8 for Gradle work correctly in some …