OnJava8-Examples/functional/MethodConversion.java at master · CSapprenticeWT/OnJava8-Examples · GitHub

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// functional/MethodConversion.java

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

import java.util.function.*;

class In1 {}

class In2 {}

public class MethodConversion {

static void accept(In1 i1, In2 i2) {

System.out.println("accept()");

}

static void someOtherName(In1 i1, In2 i2) {

System.out.println("someOtherName()");

}

public static void main(String[] args) {

BiConsumer<In1,In2> bic;

bic = MethodConversion::accept;

bic.accept(new In1(), new In2());

bic = MethodConversion::someOtherName;

// bic.someOtherName(new In1(), new In2()); // Nope

bic.accept(new In1(), new In2());

}

/* Output:

accept()

someOtherName()