// ********** SingletonDemo.java **********
class Singleton {
  private static Singleton instance = null;
  private int value = 0;
  private Singleton() { }
  public static Singleton getInstance() { 
    if (instance == null)
      instance = new Singleton();
    return instance;
  }
  public int getValue() { return value; }
  public void setValue(int i) { value = i; }
}
public class SingletonDemo {
  private static final int MAX = 50000000;
  public static void main(String args[]) {
    long t1 = System.currentTimeMillis();
    for (int i=0; i<MAX; i++) 
       Singleton.getInstance().setValue(i);
    long t2 = System.currentTimeMillis();
    System.out.print((t2-t1)+" ");
    System.out.flush();
  }
}