Java – Method References – Ameerpet Technologies

Method references:

It is JDK8 feature.
It is used to refer any method of functional interface easily.
Any method definition can be assigned to functional interface method identity and access the using its identity.

Method reference to static method as follows:

@FunctionalInterface
interface Test
{
            void abc();
}
class Demo
{
            static void fun() {
                        System.out.println(“fun…”);
            }
}
class Main
{
            public static void main(String[] args) {
                        Test obj = Demo::fun;
                        obj.abc();
            }
}

Method reference to an instance method:

@FunctionalInterface
interface Test
{
            void abc();
}
class Demo
{
            void fun() {
                        System.out.println(“fun…”);
            }
}
class Main
{
            public static void main(String[] args) {
                        Test obj = new Demo()::fun;
                        obj.abc();
            }
}

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