Delving Further into Object-Oriented Concepts - Beginning Java Programming: The Object-Oriented Approach - page 250

return this.getName() + ": Balance = " + this.getAmount();
}
}
import java.math.BigDecimal;
public class CheckingAccount extends Account {
private int numberOfSigs;
private static final BigDecimal minBalance = new BigDecimal("100.00");
public CheckingAccount(String acctName, String startAmount, int sigs) {
super(acctName, startAmount);
this.setNumberOfSigs(sigs);
}
public int getNumberOfSigs() {
return numberOfSigs;
}
public void setNumberOfSigs(int sigs) {
this.numberOfSigs = sigs;
}
@Override
public void withdraw(String withdrawal){
BigDecimal desiredAmount = new BigDecimal(withdrawal);
// if withdrawal would put the balance below the minimum,
// throw an exception
if (this.getAmount().compareTo(desiredAmount.add(minBalance)) < 0){
throw new IllegalArgumentException();
} else {
super.withdraw(withdrawal);
}
}
@Override
public String toString(){
return "Checking Account " + super.toString();
}
}
public class SavingsAccount extends Account {
public SavingsAccount(String acctName, String startAmount) {
super(acctName, startAmount);
this.deposit("10.00");
}
@Override
public String toString() {
return "Savings Account " + super.toString();
}
}