01.Object[] data = new Object[0];
02. DefaultTableModel std = new DefaultTableModel();
03. std = (DefaultTableModel) table2.getModel();
04. std.addRow(data);
05. int row = table.getSelectedRow();
06. int row1 = table2.getRowCount() - 1;
07.
08. if (row == -1) {
09. JOptionPane.showMessageDialog(null, "กรูณาค้นสินค้าและเลือกสินค้าก่อน", "เลือกสินค้าก่อน", JOptionPane.ERROR_MESSAGE);
10. std.removeRow(row1);
11. count();
12. return;
13. } else {
14. String id = table.getValueAt(row, 0).toString();
15. String name = table.getValueAt(row, 1).toString();
16. String unit = table.getValueAt(row, 2).toString();
17. String price = table.getValueAt(row, 3).toString();
18. String amount = table.getValueAt(row, 4).toString();
19. table2.setValueAt(bill.getText(), row1, 0);
20. table2.setValueAt(count++, row1, 1);
21. table2.setValueAt(id, row1, 2);
22. table2.setValueAt(name, row1, 3);
23. table2.setValueAt(unit, row1, 4);
24.
25. String unitbuy2 = JOptionPane.showInputDialog(this, "ใส่จำนวนที่ต้องการซื้อ", "กรอกจำนวนที่ต้องการซื้อ", JOptionPane.INFORMATION_MESSAGE);
26. if (unitbuy2 == null) {
27. JOptionPane.showMessageDialog(null, "กรุณากรอกจำนวน");
28. std.removeRow(row1);
29. count = 1;
30. return;
31. }
32. if (unitbuy2.matches("[0-9]+$")) {
33. } else {
34. JOptionPane.showMessageDialog(null, "กรุณากรอกเป็นตัวเลขเท่านั้น");
35. std.removeRow(row1);
36. count = 1;
37. return;
38. }
39.
40. unitbuy1 = Integer.parseInt(unitbuy2);
41. int amount1 = Integer.parseInt(amount);
42. if (unitbuy1 > amount1) {
43. JOptionPane.showMessageDialog(null, "สินค้าไม่พอขาย");
44. std.removeRow(row1);
45. count--;
46. return;
47. }
48. int pricebuy = Integer.parseInt(price);
49. int sum = unitbuy1 * pricebuy;
50. table2.setValueAt(unitbuy1, row1, 5);
51. table2.setValueAt(sum, row1, 6);
52. String showtotal2 = table2.getValueAt(row1, 6).toString();
53. int sum1;
54. sum1 = Integer.parseInt(showtotal2);
55. total = total + sum1;
56. String show = String.valueOf(total);
57. showtotal1.setText(show);
58. tax = 0.07;
59. tax = total * tax;
60. DecimalFormat df = new DecimalFormat("0.00");
61. String taxshow = String.valueOf(df.format(tax));
62. showtax.setText(taxshow);
63. saletotal = total + tax;
64. String saletotalshow = String.valueOf(df.format(saletotal));
65. showtotalsale.setText(saletotalshow);
66. for (int row11 = -1; row11 < row1; ++row11) {
67. String check1 = table.getValueAt(row, 4).toString();
68. int check2 = Integer.parseInt(check1);
69. int sumcheck = check2 - unitbuy1;
70. int checkstore[] = {sumcheck};
71. for (int a = 0; a < checkstore.length; a++) {
72. System.out.println(checkstore[a]);
73. }
74. System.out.println(row11);
75. System.out.println(row1);
Load balance : Server 04
มี Error ด้วยครับ พยายามดูอยู่ครับ ลองดู Debug ดูไหมครับ บรรทัดไหน 
