1 - compiler.warn.source.no.bootclasspath: 6
   2 - compiler.warn.option.obsolete.source: 6
   3 - compiler.warn.option.obsolete.suppression
   4 RepeatedStringCaseLabels2.java:11:15: compiler.err.feature.not.supported.in.source.plural: (compiler.misc.feature.string.switch), 6, 7
   5 RepeatedStringCaseLabels2.java:14:9: compiler.err.duplicate.case.label
   6 2 errors
   7 3 warnings