| 21 | } |
| 22 | |
| 23 | public static void main(String[] args) { |
| 24 | Converter<String, Integer> integerConverter1 = (from) -> Integer.valueOf(from); |
| 25 | Integer converted1 = integerConverter1.convert("123"); |
| 26 | System.out.println(converted1); // result: 123 |
| 27 | |
| 28 | |
| 29 | // method reference |
| 30 | |
| 31 | Converter<String, Integer> integerConverter2 = Integer::valueOf; |
| 32 | Integer converted2 = integerConverter2.convert("123"); |
| 33 | System.out.println(converted2); // result: 123 |
| 34 | |
| 35 | |
| 36 | Something something = new Something(); |
| 37 | |
| 38 | Converter<String, String> stringConverter = something::startsWith; |
| 39 | String converted3 = stringConverter.convert("Java"); |
| 40 | System.out.println(converted3); // result J |
| 41 | |
| 42 | // constructor reference |
| 43 | |
| 44 | PersonFactory<Person> personFactory = Person::new; |
| 45 | Person person = personFactory.create("Peter", "Parker"); |
| 46 | } |
| 47 | } |