In java 8, Map interface was enhances with many useful methods, which allow to avoid calling a few separate Map methods.
One of such example is in sun.font.Type1Font#expandAbbreviation method:

    private String expandAbbreviation(String abbr) {
        if (styleAbbreviationsMapping.containsKey(abbr))
                        return styleAbbreviationsMapping.get(abbr);
        return abbr;
    }

Instead we can just call
           
        return styleAbbreviationsMapping.getOrDefault(abbr, abbr);