OnJava8-Examples/interfaces/ImplementingAnInterface.java

// interfaces/ImplementingAnInterface.java
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.

interface Concept { // Package access
  void idea1();
  void idea2();
}

class Implementation implements Concept {
  @Override public void idea1() {
    System.out.println("idea1");
  }
  @Override public void idea2() {
    System.out.println("idea2");
  }
}