// #8 SHELL
package ooos;

// What does UML say about inheritance?
public class Null {

  // Constructor shown in UML "create" call
  protected Null() {
    // 1: is the ONLY line of code in the constructor!
    // 1.1: is located elsewhere, and is the result of the 1: call
  }

  // This is just a "helper" method
  private void busyWait() {
    // 2.1:
    // 2.2:
  }
  // All Threads, hencs Procs, have a concurrent "run" method
  public void run() {
    // 1: takes care of the "race condition"
    // 2: uses the helper method to waste time
  }
}