// ********** FactoryDemo.java **********
interface Product { public void operation(); }

class ConcreteProduct1 implements Product { public void operation() {} }

class ConcreteProduct2 implements Product { public void operation() {} }

class Factory {
  public static Product createProduct(int code) {
    switch (code) {
      case 1: return new ConcreteProduct1();
      case 2: return new ConcreteProduct2();
    }
    return null;
  }
}
public class FactoryDemo {
  private static final int MAX = 1000;
  public static void main(String args[]) {
    long t1 = System.currentTimeMillis();
    for (int i=0; i<10*MAX; i++) {
      Product product1 = Factory.createProduct(1);
      Product product2 = Factory.createProduct(2);
      for (int j=0; j<MAX; j++) {
        product1.operation();
        product2.operation();
      }
    }
    long t2 = System.currentTimeMillis();
    System.out.print((t2-t1)+" ");
    System.out.flush();
  }
}