javac/parser/JavacParser.java

1001             ListBuffer<JCLiteral> litBuf = new ListBuffer<>();
1007                     needsFolding |= foldIfNeeded(op.rhs, litBuf, opStack, false);
1010                     needsFolding |= foldIfNeeded(curr, litBuf, opStack, true);
1027         private boolean foldIfNeeded(JCExpression tree, ListBuffer<JCLiteral> litBuf,
1031                 litBuf.prepend(str);
1032                 return last && merge(litBuf, opStack);
1034                 boolean res = merge(litBuf, opStack);
1035                 litBuf.clear();
1041         boolean merge(ListBuffer<JCLiteral> litBuf, ListBuffer<JCExpression> opStack) {
1042             if (litBuf.isEmpty()) {
1044             } else if (litBuf.size() == 1) {
1045                 opStack.prepend(litBuf.first());
1048                 JCExpression t = F.at(litBuf.first().getStartPosition()).Literal(TypeTag.CLASS,
1049                         litBuf.stream().map(lit -> (String)lit.getValue()).collect(Collectors.joining()));
1050                 storeEnd(t, litBuf.last().getEndPosition(endPosTable));