OnJava8-Examples/tasks/IntSupplier.java

// tasks/IntSupplier.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.

public abstract class IntSupplier {
  private volatile boolean canceled = false;
  public abstract int next();
  // Allow this to be canceled:
  public void cancel() { canceled = true; }
  public boolean isCanceled() { return canceled; }
}