37 lines
772 B
Java
37 lines
772 B
Java
// staticchecking/petspeak/PetSpeak.java
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// (c)2021 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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// Speaking pets in Java
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// {java staticchecking.petspeak.PetSpeak}
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package staticchecking.petspeak;
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interface Pet {
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void speak();
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}
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class Cat implements Pet {
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@Override public void speak() {
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System.out.println("meow!");
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}
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}
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class Dog implements Pet {
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@Override public void speak() {
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System.out.println("woof!");
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}
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}
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public class PetSpeak {
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static void command(Pet p) { p.speak(); }
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public static void main(String[] args) {
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Pet[] pets = { new Cat(), new Dog() };
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for(Pet pet : pets)
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command(pet);
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}
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}
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/* Output:
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meow!
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woof!
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*/
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