test/lib-test/jdk/test/lib/hexdump/HexPrinterTest.java javac compile fails:

/home/yansendao/git/jdk11u-dev/test/lib-test/jdk/test/lib/hexdump/HexPrinterTest.java:91: error: illegal start of expression
        HexPrinter f = switch (name) {
                       ^
/home/yansendao/git/jdk11u-dev/test/lib-test/jdk/test/lib/hexdump/HexPrinterTest.java:92: error: : expected
            case "minimal" -> HexPrinter.minimal();
                          ^