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

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// functional/ClassFunctionals.java

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

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

import java.util.*;

import java.util.function.*;

class AA {}

class BB {}

class CC {}

public class ClassFunctionals {

static AA f1() { return new AA(); }

static int f2(AA aa1, AA aa2) { return 1; }

static void f3(AA aa) {}

static void f4(AA aa, BB bb) {}

static CC f5(AA aa) { return new CC(); }

static CC f6(AA aa, BB bb) { return new CC(); }

static boolean f7(AA aa) { return true; }

static boolean f8(AA aa, BB bb) { return true; }

static AA f9(AA aa) { return new AA(); }

static AA f10(AA aa1, AA aa2) { return new AA(); }

public static void main(String[] args) {

Supplier<AA> s = ClassFunctionals::f1;

s.get();

Comparator<AA> c = ClassFunctionals::f2;

c.compare(new AA(), new AA());

Consumer<AA> cons = ClassFunctionals::f3;

cons.accept(new AA());

BiConsumer<AA,BB> bicons = ClassFunctionals::f4;

bicons.accept(new AA(), new BB());

Function<AA,CC> f = ClassFunctionals::f5;

CC cc = f.apply(new AA());

BiFunction<AA,BB,CC> bif = ClassFunctionals::f6;

cc = bif.apply(new AA(), new BB());

Predicate<AA> p = ClassFunctionals::f7;

boolean result = p.test(new AA());

BiPredicate<AA,BB> bip = ClassFunctionals::f8;

result = bip.test(new AA(), new BB());

UnaryOperator<AA> uo = ClassFunctionals::f9;

AA aa = uo.apply(new AA());

BinaryOperator<AA> bo = ClassFunctionals::f10;

aa = bo.apply(new AA(), new AA());

}

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

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