gistfile1.txt

interface FactorialComputator {
  int computeFactorial(int n);
}

class RecursiveFactorial implements FactorialComputator {
  public int computeFactorial(int n) {
    if (n == 1) {
      return 1;
    }
    return this.computeFactorial(n-1) * n;
  }
}

class InterativeFactorial implements FactorialComputator {
  public int computeFactorial(int n) {
    int fac = 1;
    for(int i = 1; i<=n; i++) {
      fac *= i;
    }
    return fac;
  }
}

class SomeOtherClass {
  FactorialComputator f;
  
  public SomeOtherClass(FactorialComputator f) {
    this.f = f;
  }
  
  public int getFactorial(int n) {
    return f.computeFactorial(n);
  }
  
}