mrjink

Keybase proof

I hereby claim:

• I am mrjink on github.
• I am mrjink (https://keybase.io/mrjink) on keybase.
• I have a public key whose fingerprint is B154 B08A E641 60D4 EF1F 2F88 0D96 BEB7 1190 CD00

To claim this, I am signing this object:

mrjink

public interface Animal {
    boolean canHop();

    boolean canSwim();

    default String getName() {
        return getClass().getSimpleName();
    }
}

mrjink

import java.util.Arrays;
import java.util.List;

public class Main {
    public static void main(String[] args) {

        List<Animal> animals = Arrays.asList(new Frog(), new Kangaroo(), new Fish());

        AnimalMatcher hopMatcher = new AnimalMatcher() {
            @Override

mrjink

import java.util.Arrays;
import java.util.List;

public class Main {
    public static void main(String[] args) {

        List<Animal> animals = Arrays.asList(new Frog(), new Kangaroo(), new Fish());

        AnimalMatcher hopMatcher =

mrjink

import java.util.Arrays;
import java.util.List;

public class Main {
    public static void main(String[] args) {

        List<Animal> animals = Arrays.asList(new Frog(), new Kangaroo(), new Fish());

        AnimalMatcher hopMatcher = (Animal animal) -> { return animal.canHop(); };
        AnimalMatcher swimMatcher = (Animal animal) -> { return animal.canSwim(); };

mrjink

import java.util.Arrays;
import java.util.List;

public class Main {
    public static void main(String[] args) {

        List<Animal> animals = Arrays.asList(new Frog(), new Kangaroo(), new Fish());

        AnimalMatcher hopMatcher = (Animal animal) -> animal.canHop();
        AnimalMatcher swimMatcher = (Animal animal) -> animal.canSwim();

mrjink

import java.util.Arrays;
import java.util.List;

public class Main {
    public static void main(String[] args) {

        List<Animal> animals = Arrays.asList(new Frog(), new Kangaroo(), new Fish());

        AnimalMatcher hopMatcher = animal -> animal.canHop();
        AnimalMatcher swimMatcher = animal -> animal.canSwim();

mrjink

import java.util.Arrays;
import java.util.List;

public class Main {
    public static void main(String[] args) {

        List<Animal> animals = Arrays.asList(new Frog(), new Kangaroo(), new Fish());

        AnimalMatcher hopMatcher = Animal::canHop;
        AnimalMatcher swimMatcher = Animal::canSwim;

mrjink

import java.util.function.Predicate;

@FunctionalInterface
public interface AnimalMatcher extends Predicate<Animal> {
    boolean test(Animal animal);
}

mrjink

import java.util.Arrays;
import java.util.List;
import java.util.function.Predicate;

public class Main {
    public static void main(String[] args) {

        List<Animal> animals = Arrays.asList(new Frog(), new Kangaroo(), new Fish());

        Predicate<Animal> hopMatcher = Animal::canHop;