1 ExpressionSwitchNotExhaustive.java:10:16: compiler.err.not.exhaustive
   2 ExpressionSwitchNotExhaustive.java:16:16: compiler.err.not.exhaustive
   3 ExpressionSwitchNotExhaustive.java:29:23: compiler.err.var.might.not.have.been.initialized: s
   4 - compiler.note.preview.filename: ExpressionSwitchNotExhaustive.java
   5 - compiler.note.preview.recompile
   6 3 errors