error "0 >= 0" when trying to delete a row

[Chika]

chau! please help me with row removing from JTable.

My code:

myButton.addActionListener(new java.awt.event.ActionListener() {
                    public void actionPerformed(java.awt.event.ActionEvent evt) {
                        try {
                            int selRow = table.getSelectedRow();
                            if (table.getRowCount() > 0) {
                                directoryModel.removeRow(selRow);
                                directoryModel.fireTableChanged(null);
                            }
                        } catch (Exception exp) {
                            System.out.println(exp.getMessage());
                        }
                    }
        });

directoryModel extends DefaultTableModel and doesn't override "removeRow" method. When i try to delete a row, the error is:

"0 >= 0", "1 >= 0"...

i'm absolutely lost, cannot understand the error source. Please help.

[Fubarable]

Could you change this line:

System.out.println(exp.getMessage());

to be instead:

exp.printStackTrace();

Then show us the entire error message.

[Chika]

uf, crazy message:

java.lang.ArrayIndexOutOfBoundsException: 0 >= 0
        at java.util.Vector.removeElementAt(Vector.java:511)
        at javax.swing.table.DefaultTableModel.removeRow(DefaultTableModel.java:446)
        at SystClasses.TreeEditTest$4.actionPerformed(TreeEditTest.java:192)
        at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
        at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
        at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
        at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
        at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
        at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
        at java.awt.Component.processMouseEvent(Component.java:6263)
        at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
        at java.awt.Component.processEvent(Component.java:6028)
        at java.awt.Container.processEvent(Container.java:2041)
        at java.awt.Component.dispatchEventImpl(Component.java:4630)
        at java.awt.Container.dispatchEventImpl(Container.java:2099)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
        at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
        at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
        at java.awt.Container.dispatchEventImpl(Container.java:2085)
        at java.awt.Window.dispatchEventImpl(Window.java:2478)
        at java.awt.Component.dispatchEvent(Component.java:4460)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
        at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
        at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
BUILD SUCCESSFUL (total time: 8 seconds)

i guess you will understand it better than me:(

[Fubarable]

The error is telling your that you're trying to access an array that has no elements, and this line:

 at SystClasses.TreeEditTest$4.actionPerformed(TreeEditTest.java:192)

tells us that this is occurring on line 192 of the TreeEditTest.java code. So which line is that?

My guess is it's the remove row line. Do you know for certain that the table model that is being acted on is the same one that is being displayed in the JTable?

You may wish to create and post an SSCCE (see here: SSCCE Link).

[Chika]

thank you.

line 192 is:

myButton.addActionListener(new java.awt.event.ActionListener() {

when i run "table.getRowCount()", it displays 2 (). so my table is not empty. but why some array is empty, it's strange...

[Chika]

yes, i'm sure, because above i have "table = new JTable( directoryModel );"

[Chika]

i think i understand my problem. you are right about the difference between table and tablemodel. i will try to solve it. thank you.

[Fubarable]

thank you.

line 192 is:

myButton.addActionListener(new java.awt.event.ActionListener() {

when i run "table.getRowCount()", it displays 2 (). so my table is not empty. but why some array is empty, it's strange...

This is not the correct line that is causing your error. If you're still having an error, re-look at your stackTrace (what I had you print out before), and then recheck the line. I can guarantee you that it's not this one.

[Jnoobs]

logically, 0 >= 0 doesn't make any sense , and the main error is the "ArrayOutOfBoundsException." Which means you are using an invalid array index. When you say 0>=0 its like your telling the program that 0>0 which is false. Maybe you meant to use a variable instead which would easily fix the problem? Example: x>=0

[JosAH]

logically, 0 >= 0 doesn't make any sense

Mathematically and logically it does make sense but the expression 'X >= N' reads as follows 'your index X is equal or larger than the size N of the array' so an AIOOB exception is thrown.

kind regards,

Jos

[Fubarable]

logically, 0 >= 0 doesn't make any sense , and the main error is the "ArrayOutOfBoundsException." Which means you are using an invalid array index. When you say 0>=0 its like your telling the program that 0>0 which is false. Maybe you meant to use a variable instead which would easily fix the problem? Example: x>=0

Logically the error statement makes complete sense as 0 is in fact >= 0. If you have an empty Vector and try to remove the element at position 0 (which doesn't exist), this type of error can occur.