import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
public class Main {
public static void main(String[] argv) throws Exception {
DefaultTableModel model = new DefaultTableModel();
JTable table = new JTable(model);
model.addColumn("Col1");
model.addRow(new Object[] { "r1" });
model.addRow(new Object[] { "r2" });
model.addRow(new Object[] { "r3" });
// Move the last two rows to the start of the table
model.moveRow(model.getRowCount() - 2, model.getRowCount() - 1, 0);
JFrame f = new JFrame();
f.setSize(300, 300);
f.add(new JScrollPane(table));
f.setVisible(true);
}
}