I think you need to use DefaultTableModel for adding and removing rows. Your code might be something like this:
String[] mycolumns = {"column 1 title", "column 2 title"};
String[][] mydata = {{"foo", "bar"}, {"aaa", "bbb"}};
DefaultTableModel mytableModel = new DefaultTableModel(mydata, mycolumns);
JTable mytable = new JTable(mytableModel);
JScrollPane myscrollpane = new JScrollPane(mytable);
// ... somehwere later, whenever you want to remove a row...
int rowNumber = 0;
mytableModel.removeRow(rowNumber); // remove the first row