Help with printing out the # of quarters, nickels, dimes, and etc... using

Question

Hi, im new to java and im using a program called blue j.
anyway heres my question.
, I recommend you dont do the program for me, but rather help gear me in the right direction of things.
In this program they want me to have it print out the # of dollars,quarters,nickels,dimes, and pennies.
They have provided me with a base program to start off with which is this.
import chn.util.*;
public class ComputeChange
   *  The main program for the Change class
   * @param  args  The command line arguments - not used
  public static void main(String[] args)
    double purchase, cashPaid, temp;
    int change, remainder, dollars, quarters, dimes, nickels, pennies;
    ConsoleIO keyboard = new ConsoleIO();
    System.out.print("Enter amount of purchase --> ");
    purchase = keyboard.readDouble();
    System.out.print("Enter amount of cash paid --> ");
    cashPaid = keyboard.readDouble();
    temp = cashPaid - purchase;
    dollars = (int) temp;
    temp = temp - (int)temp + 0.0000001;
    change = (int)(temp * 100);
    System.out.println();
    System.out.println("$" + dollars + "." + change);
}Ive been given the amounts 23.06 for amount of purchase
and 30.00 for the amount paid. that should give me the difference of $6.94
It should print out the amount of change as the following
6 dollars
3 quarters
1 dime
1 nickel
1 penny.
IVe tried a few methods for printing out the # of each coin type, but i simply dont get how they are using temp or what type of funciton i need to follow. Any hints or pointings in the right direction would help. Since i need to learn this.
Thanks a lot and i hope i can get some tips. !
~Jbinks

Answer 1

And here's my contribution to the scratch batch... :o)
class Coins {
    private java.util.Map<Coin, Integer> count = new java.util.HashMap<Coin, Integer>();
    enum Coin {
        DOLLAR(100), QUARTER(25), DIME(10), NICKEL(5), PENNY(1);
        private final int value;   
        Coin(int value) { this.value = value; }
        public int value() { return value; }
    public Coins(int centsValue) {
        for (Coin c : Coin.values()) {
            count.put(c, centsValue / c.value());
            centsValue %= c.value();
    public void display() {
        for (Coin c : Coin.values()) {
            System.out.println(c + ": " + count.get(c));
public class CoinsDemo {
    private static java.util.Scanner keyboard = new java.util.Scanner(System.in);
    public static void main(String[] args) {
        int price = getPennies("Enter amount of purchase --> ");
        int paid = getPennies("Enter amount of cash paid --> ");
        new Coins(price - paid).display();
    private static int getPennies(String prompt) {
        System.out.print(prompt);
        double d = keyboard.nextDouble();
        System.out.println();
        return (int)(d * 100);
}