The following class maintains an account balance and returns a special error code. public class Account { private double balance; // returns new balance or -1 if error public double deposit(double amount) { if (amount > 0) balance += amount; else return -1; // Code indicating error return balance; } } Rewrite the class so that it throws appropriate exception instead of returning -1 as an error code. Write test code that attempts to deposit invalid amounts and catches the exceptions that are thrown

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Author:James Kurose, Keith Ross
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 The following class maintains an account balance and returns a
special error code.
public class Account
{
private double balance;
// returns new balance or -1 if error
public double deposit(double amount)
{
if (amount > 0)
balance += amount;
else
return -1; // Code indicating error
return balance;
}
}
Rewrite the class so that it throws appropriate exception instead of
returning -1 as an error code. Write test code that attempts to deposit
invalid amounts and catches the exceptions that are thrown

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