In Java, polymorphism refers to the ability of a class to provide different implementations of a method, depending on the type of object that is passed to the method.
If you are inheriting from another class, and you have got a method, and you override that method, that is what polymorphism
package anote;
public class Main {
public static void main(String[] args) {
for (int i=1; i<6; i++){
Movie movie = randomMovie();
System.out.println("Movie #" + ":" + movie.getName() + "\n" + "Plot: " + movie.plot() + "\n" );
}
}
public static Movie randomMovie(){
int randomNumber = (int) (Math.random() * 3) + 1;
System.out.println("Random number generated was: " + randomNumber);
switch(randomNumber){
case 1:
return new Jaws();
case 2:
return new LoveLetter();
case 3:
return new DoctorStrange();
}
return null;
}
}
class Movie {
private String name;
public Movie(String name) {
this.name = name;
}
public String plot() {
return "No plot here";
}
public String getName(){
return name;
}
}
class Jaws extends Movie {
public Jaws() {
super("Jaws");
}
public String plot() {
return "A shark eats lots of people";
}
}
class LoveLetter extends Movie {
public LoveLetter() {
super("Love Letter");
}
@Override
public String plot() {
return "Hello, How are you";
}
}
class DoctorStrange extends Movie {
public DoctorStrange() {
super("Doctor Strange");
}
// No plot
}Random number generated was: 3
Movie #:Doctor Strange
Plot: No plot here
Random number generated was: 1
Movie #:Jaws
Plot: A shark eats lots of people
Random number generated was: 2
Movie #:Love Letter
Plot: Hello, How are you
Random number generated was: 3
Movie #:Doctor Strange
Plot: No plot here
Random number generated was: 2
Movie #:Love Letter
Plot: Hello, How are you