Solution to Lab 3 for 1005ICT

Account.java

/**
 * Write a description of class Account here.
 * 
 * @author Tate Johnson
 * @version 2008-08-07
 */

public class Account {

    private static int nextId = 1;
    private static double totalDeposits = 0;
    
    private int id;
    private String name;
    private double balance;
    
    public Account(String name) {
        id = nextId;
        nextId++;
        this.name = name;
        balance = 0;
    }
    
    public static double totalDeposits() {
        return totalDeposits;
    }
    
    public double balance() {
        return balance;
    }
    
    public void deposit(double dAmount) {
        balance = balance + dAmount;
        totalDeposits = totalDeposits + dAmount;
    }
    
    public boolean withdraw(double wAmount) {
        if (wAmount <= balance) {
            balance = balance - wAmount;
            totalDeposits = totalDeposits - wAmount;
            return true;
        }
        else {
            return false;
        }
    }
    
    public double calcInterest(double rate) {
        double startingBalance = balance;
        double totalInterest = 0;
        for (int i = 0; i < 12; i++) {
            totalInterest = totalInterest + (startingBalance * rate);
            startingBalance = startingBalance + (startingBalance * rate);
        }
        return totalInterest;
    }
    
    public String toString() {
        return new String(name + ", " + id + ", has $" + balance);
    }

}