Java，将JList中元素的值加在一起

Question

I have a jList that contains elements with 3 parameters. The elements are

Item(double code, String name, double price)

I am trying to get the total price for all elements in the list and display it in a text box. Is this possible and if so, how can it be done?

Answer 1

Get the ListModel from the JList

ListModel model = instanceOfJList.getModel();

Iterate over the model elements...

double sum = 0;
for (int index = 0; index < model.size(); index++) {
    Item item = (Item)model.getElementAt(index);
    sum += item.getPrice();
}
// Display sum somewhere on the screen...

Answer 2

好吧，您可能必须遍历列表，并在每个元素上调用类似getPrice（）的方法来创建总和。

Answer 3

Does your item class has getters for the price?

If yes you can iterate over your list and each time get the price and add it to a variable; call it totalSum.

At the end you should be able to display your totalSum in a text box.