Getting sum of values of a column of a jtable

Question

I want to get the sum of values of a column of the table on the click of a button, perform calculations, and then display results in the corresponding textfields.

I used the following code:-

    int delivery = Integer.parseInt(DELIVERYCHG.getText());

    int subtot = 0;

    for (int i = 0; i <= ITEMDETAILSTABLE.getRowCount(); i++) {
        String stot1 = (ITEMDETAILSTABLE.getValueAt(i, 4).toString());
        int stot = Integer.parseInt(stot1);
        subtot = subtot + stot;
    }

    SUBTOTAL.setText("" + subtot);

    int subtotanddelivery = subtot + delivery;
    int gst = (int) (0.18 * subtotanddelivery);
    int total = subtotanddelivery + gst;
    GST.setText("" + gst);
    TOTAL.setText("" + total)

But output showed a error like this: Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 5 >= 5.

How can it be resolved?

Change the loop condition to `i < ITEMDETAILSTABLE.getRowCount()` — janos, Jul 15 '17 at 08:46
use String stot1 = (ITEMDETAILSTABLE.getValueAt(i, 3).toString()); it starts with 0 so use 3 instead of 3 ... it may also be a concern — Pavan Kumar, Jul 15 '17 at 09:15
@pawansharma Thank you but the issue has been resolved by changing <= with <. actually="" be="" column.="" from="" i="" so="" stot1="(ITEMDETAILSTABLE.getValueAt(i," string="" used="" value="" wanted="" will=""> — ritiksr25, Jul 15 '17 at 09:38
@JoeC I dont know it is duplicate or not. But i found this problem in my own program, hence asked this question. — ritiksr25, Jul 15 '17 at 09:41

score 1 · Accepted Answer · answered Jul 15 '17 at 08:48

1

Change:

int i = 0; i <= ITEMDETAILSTABLE.getRowCount(); i++

to

int i = 0; i < ITEMDETAILSTABLE.getRowCount(); i++

Indexes are counted from zero, so if 5 elements are in present, 4 is maximum index.

answered Jul 15 '17 at 08:48

user3734782

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Getting sum of values of a column of a jtable

1 Answers1