InterestAccount.java

public class InterestAccount {
	private double balance;
	private double interest;

	// Constructors
	public InterestAccount (double initialBalance, double initialInterest) {
		this.balance = initialBalance;
		this.interest = initialInterest;
	}

	// Getters and Setters
	public double getBalance () { return this.balance; }
	public void setBalance (double bal) { this.balance = bal; }
	public double getInterest () { return this.interest; }
	public void setInterest (double interest) { this.interest = interest; }

	// Other member functions

	/**
	 * Accrue account balance by one year's interest
	 * @return Account balance after the accrual
	 */
	public double accrue () {
		this.balance = balance + (balance * interest);
		return this.balance;
	}
	
	
	/**
	 * Accrue account balance by specified years of interest
	 * @param y Number of years to accrue
	 * @return Account balance after accrual
	 */
	public double accrueYears (int y) {
		while (y != 0) {
			accrue();
			y--;
		}
		
		return this.balance;
	}
}