im quite new in Java. I want to add Columns in a JTable at a specified index. For this i am using addColumn(..) and then move them with moveColumn(...), this works great at the first time, but when i add another column it kind of moves also the other(before added columns). Do you have any suggestions? this is the code i've written in the TableModel is: public void addColumn(Object columnName, Vector columnData, JTable table) { int moveTo = ((Integer)columnName); boolean unselected = moveTo==-1; super.addColumn(this.getColumnCount(), columnData); if(!unselected) {//if a column was selected table.moveColumn(this.getColumnCount()-1, moveTo+1); } }