sort hashmap by key java code example
Example: sorting hashmap by key in java 8
Map<String, String> newMapSortedByKey = sample.entrySet().stream()
.sorted((e1,e2) -> e1.getKey().compareTo(e2.getKey()))
.collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue, (e1,e2) -> e1, LinkedHashMap::new));