Wrapping a series of asynchronous calls with a synchronous method with a return value

My current code uses series of asynchronous processes that culminate in results. I need to wrap each of these in such a way that each is accessed by a synchronous method with the result as a return value. I want to use executor services to do this, so as to allow many of these to happen at the same time. I have the feeling that Future might be pertinent to my implementation, but I can't figure out a good way to make this happen.

What I have now:

public class DoAJob {
  ResultObject result;

  public void stepOne() {
    // Passes self in for a callback
    otherComponent.doStepOne(this);
  }

  // Called back by otherComponent once it has completed doStepOne
  public void stepTwo(IntermediateData d) {
    otherComponent.doStepTwo(this, d);
  }

  // Called back by otherComponent once it has completed doStepTwo
  public void stepThree(ResultObject resultFromOtherComponent) {
    result = resultFromOtherComponent;
  //Done with process
  }
}

This has worked pretty well internally, but now I need to map my process into a synchronous method with a return value like:

public ResultObject getResult(){
  // ??? What goes here ???
}

Does anyone have a good idea about how to implement this elegantly?