Demonstrating That a Variable of an Interface Can Store the Reference of the Object of the Class Implementing the Interface - Java Object Oriented Design

Java examples for Object Oriented Design:interface

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Description

Demonstrating That a Variable of an Interface Can Store the Reference of the Object of the Class Implementing the Interface

Demo Code

interface Swimmable {
  void swim();//  ww  w  .j av  a 2 s  .  c  o m
}

class Fish implements Swimmable {
  private String name;

  public Fish(String name) {
    this.name = name;
  }

  public void swim() {
    System.out.println(name + " (a fish) is swimming.");
  }
}

public class Main {
  public static void main(String[] args) {
    Swimmable finny = new Fish("Finny");
    finny.swim();
  }
}

Result


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