countingobject.java

Java程序设计技巧与开发实例附书源代码。

public class CountingObject
{
  public static int counter = 0;

  public CountingObject()
  {
    counter++;
    System.out.println("=> Created object # " + counter);
  }

  public void finalize()
  {
    System.out.println("=> Dismissed object # " + counter);
    counter--;
  }
}