Im having this error and i have no idea what went wrong
private void jTotalActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
itemcost[0] = Double.parseDouble(jTxtGTX750.getText()) * 2500;
itemcost[1] = Double.parseDouble(jTxtGTX750TI.getText()) * 2700;
itemcost[2] = Double.parseDouble(jTxtGTX760.getText()) * 2800;
itemcost[3] = Double.parseDouble(jTxtGTX770.getText()) * 3000;
itemcost[4] = Double.parseDouble(jTxtGTX780.getText()) * 3300;
itemcost[5] = Double.parseDouble(jTxtGTX780TI.getText()) * 3500;
itemcost[6] = Double.parseDouble(jTxtGTX950.getText()) * 2700;
itemcost[7] = Double.parseDouble(jTxtGTX960.getText()) * 3500;
itemcost[8] = Double.parseDouble(jTxtGTX970.getText()) * 3800;
itemcost[9] = Double.parseDouble(jTxtGTX980.getText()) * 5000;
itemcost[10] = Double.parseDouble(jTxtGTX980TI.getText()) * 6000;
itemcost[11] = Double.parseDouble(jTxtGTX1050.getText()) * 4500;
itemcost[12] = Double.parseDouble(jTxtGTX1050TI.getText()) * 5500;
itemcost[13] = Double.parseDouble(jTxtGTX10603GB.getText()) * 7500;
itemcost[14] = Double.parseDouble(jTxtGTX10606GB.getText()) * 9000;
itemcost[15] = Double.parseDouble(jTxtGTX1070.getText()) * 12000;
itemcost[16] = Double.parseDouble(jTxtGTX1070TI.getText()) * 15000;
itemcost[17] = Double.parseDouble(jTxtGTX1080.getText()) * 21000;
itemcost[18] = Double.parseDouble(jTxtGTX1080TI.getText()) * 28000;
itemcost[19] = Double.parseDouble(jTxtGTXTITANV.getText()) * 40000;
itemcost[20] = itemcost[0] + itemcost[1] + itemcost[2] + itemcost[3] + itemcost[4] + itemcost[5] + itemcost[6];
itemcost[21] = itemcost[7] + itemcost[8] + itemcost[9] + itemcost[10] + itemcost[11] + itemcost[12] + itemcost[13];
itemcost[22] = itemcost[14] + itemcost[15] + itemcost[16] +itemcost[17] + itemcost[18] + itemcost[19];
itemcost[23] = itemcost[20] + itemcost[21] + itemcost[22];
iTax = String.format("Php %.2f", itemcost [23] / 100);
iSubTotal = String.format("Php %.2f", itemcost [23]);
iTotal = String.format("Php %.2f", itemcost [23] * (itemcost[23] / 100));
jTxtTax.setText (iTax);
jTxtSubTotal.setText (iSubTotal);
jTxtTotal.setText (iTotal);
These are the error i got Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 23 at PointOfSaleSystem.PointOfSaleSystem.jTotalActionPerformed(PointOfSaleSystem.java:1395) at PointOfSaleSystem.PointOfSaleSystem.access$8400(PointOfSaleSystem.java:16) at PointOfSaleSystem.PointOfSaleSystem$85.actionPerformed(PointOfSaleSystem.java:1064) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252) at java.awt.Component.processMouseEvent(Component.java:6539) at javax.swing.JComponent.processMouseEvent(JComponent.java:3324) at java.awt.Component.processEvent(Component.java:6304) at java.awt.Container.processEvent(Container.java:2239) at java.awt.Component.dispatchEventImpl(Component.java:4889) at java.awt.Container.dispatchEventImpl(Container.java:2297) at java.awt.Component.dispatchEvent(Component.java:4711) at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4904) at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4535) at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4476) at java.awt.Container.dispatchEventImpl(Container.java:2283) at java.awt.Window.dispatchEventImpl(Window.java:2746) at java.awt.Component.dispatchEvent(Component.java:4711) at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760) at java.awt.EventQueue.access$500(EventQueue.java:97) at java.awt.EventQueue$3.run(EventQueue.java:709) at java.awt.EventQueue$3.run(EventQueue.java:703) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:84) at java.awt.EventQueue$4.run(EventQueue.java:733) at java.awt.EventQueue$4.run(EventQueue.java:731) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74) at java.awt.EventQueue.dispatchEvent(EventQueue.java:730) at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205) at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
