Java Reference
In-Depth Information
Consider the
DataSet
class of
Chapter 6
. We used that class to compute the average
and maximum of a set of input values. However, the class was suitable only for
computing the average of a set of numbers. If we wanted to process bank accounts to
find the bank account with the highest balance, we would have to modify the class,
like this:
public class DataSet
// Modified for BankAccount objects
{
. . .
public void add(
BankAccount
x)
{
sum = sum + x
.getBalance()
;
if (count == 0 || maximum
.getBalance()
<
x
.getBalance()
)
maximum = x;
count ++;
}
public
BankAccount
getMaximum()
{
return maximum;
}
private double sum;
private
BankAccount
maximum;
private int count;
}
388
389
Or suppose we wanted to find the coin with the highest value among a set of coins.
We would need to modify the
DataSet
class again.
public class DataSet
// Modified for Coin objects
{
. . .
public void add(
Coin
x)
{
sum = sum + x
.getValue()
;
if (count == 0 || maximum
.getValue()
<
x
.getValue()
)
maximum = x;
count++;
}
public
Coin
getMaximum()
{
return maximum;
