class ThreadPoolExecutor {}
class ScheduledThreadPoolExecutor extends ThreadPoolExecutor {} // derived class

interface Enhance {
  default Runnable enhanceTask(Runnable command) {
    // wrap runnable
    ...
  }
}
class CommonThreadPoolExecutor extends ThreadPoolExecutor implements Enhance {}
class CommonScheduledThreadPoolExecutor extends ScheduledThreadPoolExecutor implements Enhance {}

If I want to enhance the execute method in ThreadPoolExecutor, I must write same @Override twice:

class CommonThreadPoolExecutor extends ThreadPoolExecutor implements Enhance {
  @Override
  public void execute(@NonNull Runnable command) {
    Runnable runnable = enhanceTask(command);
    super.execute(runnable);
  }
}

class CommonScheduledThreadPoolExecutor extends ScheduledThreadPoolExecutor implements Enhance {
  @Override
  public void execute(@NonNull Runnable command) {
    Runnable runnable = enhanceTask(command);
    super.execute(runnable);
  }
}

Must keep instances is assignable to ThreadPoolExecutor or ScheduledThreadPoolExecutor.