Class Demo_Optional


  • public class Demo_Optional
    extends Object
    Demo of working with optional.
    Author:
    Herbert Praehofer
    • Constructor Detail

      • Demo_Optional

        public Demo_Optional()
    • Method Detail

      • main

        public static void main​(String[] args)
      • lookup

        static <A,​B> Optional<B> lookup​(Map<A,​B> map,
                                              A key)