public class Artifact {
	public static java.util.Date startup;   // time of class creation
	private static java.util.Date oldest;   // time of first instantiation
	private static java.util.Date youngest; // time of most recent instantiation
	private static int count = 0;           // total number of instantiations
	private float size;

	static {
		startup = new java.util.Date();
	}
	
	public static String getInstanceCount() {
		return Integer.toString(count);
	}

	public Artifact(float size) {
		if (oldest == null) {
			oldest = new java.util.Date();
		}
		youngest = new java.util.Date();
		count++;
		this.size = size;
	}
	
	public String toString() {
		String value = "This instance, size = " + size + "\n";
		value += "  Class creation:     " + Artifact.startup.toString() + "\n";
		value += "  First instantation: " + Artifact.oldest.toString() + "\n";
		value += "  Last instantiation: " + Artifact.youngest.toString() + "\n";
		value += "  Number of instantiations: " + Artifact.count;
		return value;
	}
}