1 - compiler.warn.incubating.modules: jdk.incubator.mvt 2 - compiler.err.warnings.and.werror 3 CheckNullCastable.java:10:54: compiler.warn.prob.found.req: (compiler.misc.inconvertible.types: compiler.misc.type.null, CheckNullCastable) 4 CheckNullCastable.java:11:17: compiler.warn.incomparable.types: CheckNullCastable, compiler.misc.type.null 5 CheckNullCastable.java:11:17: compiler.warn.value.does.not.support: != 6 CheckNullCastable.java:12:18: compiler.warn.incomparable.types: compiler.misc.type.null, CheckNullCastable 7 CheckNullCastable.java:12:18: compiler.warn.value.does.not.support: != 8 1 error 9 6 warnings