• Map.getOrDefault method could be used to replace the code like this:

        String val = map.containsKey(key) ? map.get(key) : "none";

• Map.computeIfAbsent method could be used to replace the code like this:

        List<String> list = map.get(key);
        if (list == null) {
          list = new ArrayList<>();
          map.put(key, list);
        }

• Map.putIfAbsent method could be used to replace the code like this:

        String val = map.get(key);
        if (val == null) map.put(key, newVal);

• Map.merge method could be used to replace the code like this:

        Integer val = map.get(key);
        if (val == null) map.put(key, 1);
        else map.put(key, val + 1);

This inspection only reports if the project or module is configured to use a language level of 8 or higher.

New in 2016.3