// lowlevel/IntTestable.java
// (c)2017 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.
import java.util.function.*;

public abstract class
IntTestable implements Runnable, IntSupplier {
  abstract void evenIncrement();
  @Override
  public void run() {
    while(true)
      evenIncrement();
  }
}