OnJava8-Examples/tasks/Fat.java

// tasks/Fat.java
// (c)2016 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
// Objects that are expensive to create

public class Fat {
  private volatile double d; // Prevent optimization
  private static int counter = 0;
  private final int id = counter++;
  public Fat() {
    // Expensive, interruptible operation:
    for(int i = 1; i < 10000; i++) {
      d += (Math.PI + Math.E) / (double)i;
    }
  }
  public void operation() { System.out.println(this); }
  @Override
  public String toString() { return "Fat id: " + id; }
}