OnJava8-Examples/generics/SimpleDogsAndRobots.java

// generics/SimpleDogsAndRobots.java
// (c)2016 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
// Removing the generic; code still works.

class CommunicateSimply {
  static void perform(Performs performer) {
    performer.speak();
    performer.sit();
  }
}

public class SimpleDogsAndRobots {
  public static void main(String[] args) {
    CommunicateSimply.perform(new PerformingDog());
    CommunicateSimply.perform(new Robot());
  }
}
/* Output:
Woof!
Sitting
Click!
Clank!
*/