/**
 * Title: ObjCount
 * Description: demo of static fields and finalize
 * @author hollingd@cs.rpi.edu
 */

public class ObjCount {
	// static fields keep track of the next id number 
	//  and the total number of object that exist.
	static int next_id=0;
	static int objcount;

	// id is an instance field, each object has it's own.
	int id;

	// no exception handling (for brevity), but there should be!

	public static void main(String[] args) {

		int n = Integer.parseInt(args[0]);

		for (int i=0;i<n;i++) {
			ObjCount o = new ObjCount();
			System.out.println(o);
			System.out.println("There are " + objcount + " objects ");
			if (i % 5 == 0) {
				// explicit call to the garbage collector every 5 objects.
				System.gc();
			}
		}

	}

	// constructor
	ObjCount() {
		id = next_id++;
		objcount++;
	}

	// finalize is called when an object is destroyed by the GC
	protected void finalize() {
		objcount--;
	}
	
	public String toString() {
		return("ID: " + id );
	}


}