33 lines
547 B
Java
33 lines
547 B
Java
// staticchecking/petspeak/PetSpeak.java
|
|
// Speaking pets in Java
|
|
package staticchecking.petspeak;
|
|
|
|
interface Pet {
|
|
void speak();
|
|
}
|
|
|
|
class Cat implements Pet {
|
|
public void speak() {
|
|
System.out.println("meow!");
|
|
}
|
|
}
|
|
|
|
class Dog implements Pet {
|
|
public void speak() {
|
|
System.out.println("woof!");
|
|
}
|
|
}
|
|
|
|
public class PetSpeak {
|
|
static void command(Pet p) { p.speak(); }
|
|
public static void main(String[] args) {
|
|
Pet[] pets = { new Cat(), new Dog() };
|
|
for(Pet pet : pets)
|
|
command(pet);
|
|
}
|
|
}
|
|
/* Output:
|
|
meow!
|
|
woof!
|
|
*/
|