1 - compiler.warn.incubating.modules: jdk.incubator.mvt 2 - compiler.err.warnings.and.werror 3 CheckSynchronized.java:9:23: compiler.warn.mod.not.allowed.here: synchronized 4 CheckSynchronized.java:12:9: compiler.warn.type.found.req: CheckSynchronized, (compiler.misc.type.req.ref) 5 CheckSynchronized.java:15:9: compiler.warn.type.found.req: CheckSynchronized, (compiler.misc.type.req.ref) 6 1 error 7 4 warnings