src/share/classes/com/sun/tools/javac/comp/Lower.java

*** 3448,3457 ****
--- 3448,3458 ----
              int casePosition = 0;
              for(JCCase oneCase : caseList) {
                  JCExpression expression = oneCase.getExpression();
  
                  if (expression != null) { // expression for a "default" case is null
+                     expression = TreeInfo.skipParens(expression);
                      String labelExpr = (String) expression.type.constValue();
                      Integer mapping = caseLabelToPosition.put(labelExpr, casePosition);
                      Assert.checkNull(mapping);
                      int hashCode = labelExpr.hashCode();
  
*** 3553,3564 ****
                  boolean isDefault = (oneCase.getExpression() == null);
                  JCExpression caseExpr;
                  if (isDefault)
                      caseExpr = null;
                  else {
!                     caseExpr = make.Literal(caseLabelToPosition.get((String)oneCase.
!                                                                     getExpression().
                                                                      type.constValue()));
                  }
  
                  lb.append(make.Case(caseExpr,
                                      oneCase.getStatements()));
--- 3554,3565 ----
                  boolean isDefault = (oneCase.getExpression() == null);
                  JCExpression caseExpr;
                  if (isDefault)
                      caseExpr = null;
                  else {
!                     caseExpr = make.Literal(caseLabelToPosition.get((String)TreeInfo.skipParens(oneCase.
!                                                                                                 getExpression()).
                                                                      type.constValue()));
                  }
  
                  lb.append(make.Case(caseExpr,
                                      oneCase.getStatements()));