package exampleStatic;

public class CounterOfInstances {

	// Stores the total number of instances created.
	private static int numberOfInstances = 0;

	// Returns the total number of instances created.
	static int getCounter() {
		return numberOfInstances;
	}

	// Increases the total number of instances created.
	private static void addInstance() {
		numberOfInstances++;
	}

	// The default constructor of the class -- it is invoked whenever an
	// instance is created.
	// It calls the method that increases the total number of instances!
	CounterOfInstances() {
		CounterOfInstances.addInstance();
	}

	// Main method
	public static void main(String[] args) {
		System.out.println("At the beginning, we have "
				+ CounterOfInstances.getCounter() + " instances of the class.");
		// We create 10 new instances of the class CounterOfInstances.
		for (int i = 0; i < 10; i++)
			new CounterOfInstances();
		System.out.println("We have now created "
				+ CounterOfInstances.getCounter() + " instances of the class.");

	}
}