Method reference is used to refer method of functional interface. It is compact and easy form of lambda expression. Each time when you are using lambda expression to just referring a method, you can replace your lambda expression with method reference.<\/p>\n
3 types of method references:<\/p>\n
Reference to a static method<\/strong> Reference to an instance method<\/strong> Reference to a constructor<\/strong> Method reference is used to refer method of functional interface. It is compact and easy form of lambda expression. Each time when you are using lambda expression to just referring a method, you can replace your lambda expression with method reference. 3 types of method references: Reference to a static method Reference to an instance… Continue reading
\nSyntax<\/strong><\/p>\n\r\n ClassName::MethodName\r\n<\/pre>\n
\r\nimport java.util.function.BiFunction;\r\nclass Arithmetic \r\n {\r\n public static int add(int a, int b) \r\n {\r\n return a + b;\r\n }\r\n}\r\npublic class MethodReference \r\n{\r\n public static void main(String[] args) \r\n {\r\n BiFunction < Integer, Integer, Integer > adder = Arithmetic::add;\r\n int result = adder.apply(10, 20);\r\n System.out.println(result);\r\n }\r\n}\r\n<\/pre>\n
\nSyntax<\/strong><\/p>\nObject::methodName<\/pre>\n
\r\nimport java.util.function.BiFunction;\r\nclass Arithmetic \r\n {\r\n public int add(int a, int b) \r\n {\r\n return a + b;\r\n }\r\n}\r\npublic class MethodReference \r\n{\r\n public static void main(String[] args) \r\n {\r\n Arithmetic objArithmetic = new Arithmetic();\r\n BiFunction < Integer, Integer, Integer > adder = objArithmetic::add;\r\n int result = adder.apply(10, 20);\r\n System.out.println(result);\r\n }\r\n}\r\n<\/pre>\n
\nSyntax<\/strong><\/p>\n\r\nClassName::new \r\n<\/pre>\n
\r\ninterface Messageable {\r\n Message getMessage(String msg);\r\n}\r\nclass Message {\r\n Message(String msg) {\r\n System.out.print(msg);\r\n }\r\n}\r\npublic class ConstructorReference {\r\n public static void main(String[] args) {\r\n Messageable hello = Message::new;\r\n hello.getMessage("Hello");\r\n }\r\n}\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"