How would I add enumerated type values in an array

How would I add enumerated type values in an array

Heres the method where I try to add everything. What im trying to do is
add up a series of coins, which are named penny,dime...etc. And i gave all
of them a value within the enum. But how do I access each of the coins
within the array, then add up their values?
public double totalValue(Coin[] coins)
{
double sum = 0;
//computes and returns the monetary value of all the coins in the jar
for(int i = 0; i < coins.length; i++)
{
double coinValue = coins[i].CoinName.getCoinValue();
sum = sum + coins[i];
System.out.println(sum);
}
return sum; //change this!
}
and here is where the values for the enum are defined.
public enum CoinName
{
PENNY(.01), NICKEL(.05), DIME(.10), QUARTER(.25), FIFTY_CENT(.50),
DOLLAR(1.0);
private double value;
private double coinValue;
private CoinName(double value)
{
this.coinValue = value;
}
public double getCoinValue()
{
return coinValue;
}
}