处理金钱时尾随零

Question

I need to create a method that returns the total amount of money in dollar notation with two decimal places. Any help would be wonderful. This is what I have so far...

private final double QVALUE = 0.25;
private final double DVALUE = 0.10;
private final double NVALUE = 0.05;
private final double PVALUE = 0.01;

public double dollarValue() {
    double amount = (quarters * QVALUE) + (dimes * DVALUE) + 
        (nickels * NVALUE) + (pennies * PVALUE);
    return amount;
}

I have provided the values for each coin and the method I need to return a double in. Thanks!

Ex. When I get $1.50 for the total amount of money, it displays as $1.5, I need it to display $1.5 and I do not want to use DecimalFormat because it needs to return a String

Answer 1

I don't understand what you mean by "it needs to return a String". Can't you just use String.format("%.2f", d); ?

Answer 2

May be this is what you want:

NumberFormat currencyFormat = NumberFormat.getCurrencyInstance(Locale.US);
String s = currencyFormat.format(1.5);

Result is "$1.50"