jtable column blues

[Azoth]

I have a table with 7 columns. I am trying to delete columns 2-6. Here is the code:

for(int col=1;col<6;col++)
    StatsTable.removeColumn(StatsTable.getColumnModel().getColumn(col));

It does not get rid of column 2.
I also get the error
Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 4 >= 4
I think I can fix this . If not tell me how to.

[2kaud]

When you remove a column, the column numbers get changed. So if you remove column 1 then what was column 2 becomes the new column 1, old column 3 becomes column 2 etc and the old last column becomes invalid as it no longer exists. So you always remove the first column in the range you want to delete and iterate for the required number of columns to delete.

[Azoth]

When you remove a column, the column numbers get changed. So if you remove column 1 then what was column 2 becomes the new column 1, old column 3 becomes column 2 etc and the old last column becomes invalid as it no longer exists. So you always remove the first column in the range you want to delete and iterate for the required number of columns to delete.

Uh huh..I didn't think of that about the columns
Could you give the code for the loop that describes
this?

[2kaud]

I'm not java (I'm c++) so this may not be quite right, but something like

for (int col=2; col <= 6; col++)
    StatsTable.removeColumn(StatsTable.getColumnModel().getColumn(2));

[Azoth]

I'm not java (I'm c++) so this may not be quite right, but something like

for (int col=2; col <= 6; col++)
    StatsTable.removeColumn(StatsTable.getColumnModel().getColumn(2));

Ok that gets rid of many columns except the 2nd one.
I tried variants like

for (int col=3; col <= 6; col++)
    StatsTable.removeColumn(StatsTable.getColumnModel().getColumn(3));

But 2nd column still remains ,arg

[2kaud]

Do the column numbers start at 1 or 0 (what is the basis for element access to .getColumn()? You may need

for (int col=2; col <= 6; col++)
    StatsTable.removeColumn(StatsTable.getColumnModel().getColumn(1));

[jcaccia]

Is it the original column #2 that is not deleted or a column that shows now in the second position after deleting them?
The correct code should be:

for (int col = 1; col < 6; col++) {
    StatsTable.removeColumn(StatsTable.getColumnModel().getColumn(1));
}

This would leave only one column. Make sure the limit of the for (6) is a constant or a variable with the value of StatsTable.getColumnCount() before you enter the for. If you use

for (int col = 1; col < StatsTable.geColumnCount(); col++ ...

the column count will be calculated at the end of each loop, and decreases with every deleted column.

[Azoth]

[QUOTE=jcaccia;2218091]Is it the original column #2 that is not deleted or a column that shows now in the second position after deleting them?
The correct code should be:

for (int col = 1; col < 6; col++) {
    StatsTable.removeColumn(StatsTable.getColumnModel().getColumn(1));
}

This would leave only one column. Make sure the limit of the for (6) is a constant or a variable with the value of StatsTable.getColumnCount() before you enter the for. If you use

for (int col = 1; col < StatsTable.geColumnCount(); col++ ...

the column count will be calculated at the end of each loop, and decreases with every deleted

When I look at the specs of table it says I have 7 columns
I use Netbeans 8.2 I guess column 1 is the first
column ? Ok I will try this

[jcaccia]

The column indexes are 0 based, so the 2nd column would be column 1.

[Azoth]

[QUOTE=Azoth;2218105]

Is it the original column #2 that is not deleted or a column that shows now in the second position after deleting them?
The correct code should be:

for (int col = 1; col < 6; col++) {
    StatsTable.removeColumn(StatsTable.getColumnModel().getColumn(1));
}

This would leave only one column. Make sure the limit of the for (6) is a constant or a variable with the value of StatsTable.getColumnCount() before you enter the for. If you use

for (int col = 1; col < StatsTable.geColumnCount(); col++ ...

the column count will be calculated at the end of each loop, and decreases with every deleted

When I look at the specs of table it says I have 7 columns
I use Netbeans 8.2 I guess column 1 is the first
column ? Ok I will try this

[Azoth]

Ok I got rid of the 2nd column,but can’t get rid of the last one .
Any ideas?

[jcaccia]

Can you post the code you have now?

[Azoth]

Can you post the code you have now?

The code has been posted previously.

[Azoth]

The code has been posted previously.

[jcaccia]

The code has been posted previously.

but it didn't work, and there were a couple of versions with different starting values for col and the argument for .getColumn. According to your post #11 you "got rid of the 2nd column,but can’t get rid of the last one"; if you don't want to show us what you are running now we cannot guess what is happening.