MyCounter.java

/* The counter class 
 */
public class MyCounter {
  /* the counter, initialize to zero */
  private static int c = 0;

  /** 
   * increases the counter by <pre>howmany</pre>
   * @param howmany, the increment of the counter.
   */
  public static synchronized void increase(int howmany) {
    c += howmany;
  }

  /**
   * reports the counter content.
   */
  public static synchronized void report() {
    System.err.println("counter : " + c);
  }
}