/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class StepBuilderExample
{
	interface FinishedProduct {
 
	}
 
	interface StepOneDoer {
		StepTwoDoer doStepOne();
	}
 
	interface StepTwoDoer {
		StepThreeDoer doStepTwo();
	}
 
	interface StepThreeDoer {
		FinishedProduct doStepThree();
	}
 
	public static void main (String[] args) throws java.lang.Exception
	{
		StepOneDoer x = null; // get one somehow.
		StepTwoDoer y = x.doStepOne();
		StepThreeDoer z = y.doStepTwo();
		FinishedProduct p = z.doStepThree();
	}
}

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