/**
 * Two threads that share an account and both do
 * a deposit concurrently cause a race condition
 * but no data race.
 */
public class Account {
	private double balance;
	
	public void deposit(double amount) {
		double temp;
		synchronized (this) {
			temp = this.balance;
		}
		temp += amount;
		synchronized (this) {
			this.balance = temp;
		}
	}
}