// enumerations/PetPatternMatch.java

// (c)2021 MindView LLC: see Copyright.txt

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

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

// {NewFeature} Preview in JDK 17

// Compile with javac flags:

// --enable-preview --source 17

import java.util.*;

public class PetPatternMatch {

static void careFor(Pet p) {

switch(p) {

case Dog d -> d.walk();

case Fish f -> f.changeWater();

case Pet sp -> sp.feed();

};

}

static void petCare() {

List.of(new Dog(), new Fish())

.forEach(p -> careFor(p));

}

}