public class Investment {

	private double balance;

	private double interestRate;

	public Investment() {
		balance = 1000.0;
		interestRate = 3.5;
	}

	public Investment(double balance, double rate) {
		this.setBalance(balance);
		this.setInterestRate(rate);
	}

	public double getBalance() {
		return balance;
	}

	public double getInterestRate() {
		return interestRate;
	}

	public void setBalance(double balance) {
		if (balance < 0) {
			throw new IllegalArgumentException("Balance should be greater than 0");
		} else {
			this.balance = balance;
		}
	}

	public void setInterestRate(double rate) {
		if (interestRate <= 0 || interestRate > 12) {
			throw new IllegalArgumentException("Interest must be greater than 0, and no more than 12.");
		} else {
			this.interestRate = rate;
		}
	}

	public double totalInterest() {
		return (interestRate/100.0)*(balance);
	}

	public double totalInvestment(int periods) {
		return Math.pow(balance * (1 + interestRate/100), periods);
	}

	public String toString() {
		return String.format("Investment Information%nCurrent Balance: %4.2f%nInterest Rate: %4.1f %", balance, interestRate);
	}
}