public static void addItem(Customer name){
Stationary item;
String add = JOptionPane.showInputDialog(null,
"To purchase:\nPaper: Key in'1', colour, weight of paper required (in grams)\n"
+"Ribbon: Key in '2', colour, length of ribbon required (in cm)",
"Purchase Stationary",
JOptionPane.PLAIN_MESSAGE);

StringTokenizer st = new StringTokenizer(add,",");
int num = Integer.parseInt( st.nextToken() );
String colour = st.nextToken();
double amount = Double.parseDouble( st.nextToken() );

if (num == 1)
item = (Stationary) new Paper(colour,amount);
else
item = (Stationary) new Ribbon(colour,amount);

name.addOrder(item);
}

public void addToCart() {
String type;
String colour;
double prop;
try {
String a = JOptionPane.showInputDialog(this, "To purchase:\nPaper: key in \"1\",color,weight of paper required (in grams)\nRibbon: key in \"2\",color, length of ribbon required (in cm)", "Purchase Stationary", JOptionPane.QUESTION_MESSAGE);
if (a != null) {
st = new StringTokenizer(a, ",");
type = st.nextToken().trim();
colour = st.nextToken().trim();
prop = Double.parseDouble(st.nextToken().trim());

Stationary b = null;
if (type.equals("1")) {
b = new Paper(colour, prop);
}
else if (type.equals("2")) {
b = new Ribbon(colour, prop);
}
else {
throw new Exception();
}
stationaries.add(b);
}

} catch (Exception ex) {

JOptionPane.showMessageDialog(this, "Please key in according to the format given");
addToCart();
}

}

bettina | 3:57 PM