Use of Optional in a map
Uses for Optional
java optional parameters Why isn't there an Optional.or(Optional default) method? Java - Optional loop Generic Method to Get Optional Item from Map Java Object with optional fields How to return when an optional is empty? type of map() and filter() operations of Optional Java 8 example for if else with Optional Optional method in Java Interface Return value from Optional Java 8 - Difference between Optional.flatmap and Optional.map Java 8 Optional return type Understanding Optional<T>.map() Good way to convert Optional<Integer> to Optional<Long> using a stream based on the content of Optional<Map> Java Optional for method argument? How can I map an optional into a primitive optional? Java optional parameters Java 8 Optional<T> get How do I use methods with optional data Need help on Java 1.8 Optional with map Get value from one Optional or another Optional method parameter in Java How to use optional arguments in defprotocol? Java 8 Optional Java 8 Optional get() method Java 8 Optional instead of if Java - make a library and import optional Creating an Object from Optional<Object>