1 - compiler.warn.source.no.bootclasspath: 6
   2 - compiler.warn.option.obsolete.source: 6
   3 - compiler.warn.option.obsolete.suppression
   4 OneCaseSwitches.java:23:15: compiler.err.feature.not.supported.in.source.plural: (compiler.misc.feature.string.switch), 6, 7
   5 1 error
   6 3 warnings