public class User {
public static void main(String[] args) {
    Bank bank = new Bank(5);
    BankAccount[] bas = new BankAccount[3];
    for (int i = 0; i < 3; i++) {
        bas[i] = bank.makeAccount("" + i, 100);
    }
    for (int i = 0; i < 10; i++) {
        int acct = makeRandom(3);
        int amt = 10 + makeRandom(11);
        if (makeRandom(2) == 1) {
            bas[acct].deposit(amt);
        } else {
            bas[acct].withdrawal(amt);
        }
    }
    bank.listAccounts();
}

    public static int makeRandom(int max) {
        return (int)(Math.random() * max);
    }

}