map轉list

Map<String, String> map = new HashMap<>();
// Convert all Map keys to a List
List result = new ArrayList(map.keySet());
// Convert all Map values to a List
List result2 = new ArrayList(map.values());
// Java 8, Convert all Map keys to a List
List result3 = map.keySet().stream()
.collect(Collectors.toList());
// Java 8, Convert all Map values to a List
List result4 = map.values().stream()
.collect(Collectors.toList());
// Java 8, seem a bit long, but you can enjoy the Stream features like filter and etc.
List result5 = map.values().stream()
.filter(x -> !"apple".equalsIgnoreCase(x))