Hỏi về cách khắc phục lỗi Java.lang.IndexOutOfBoundsException: Index: 1, Size: 1

Như tiêu đề em đang gặp lỗi trên khi tạo 1 Java Swing trên Netsbean, cụ thể tại đoạn em tạo Nút bán hàng thì xảy ra lỗi

private void BanActionPerformed(java.awt.event.ActionEvent evt) {                                    

        int r = jTable1.getSelectedRow() ; 
        if(r == - 1) {
            if(jTable1.getRowCount() == 0) {
                   JOptionPane.showMessageDialog( rootPane, "Table is Empty !" );
            }
            
            else {
                   JOptionPane.showMessageDialog(rootPane, "You must select a Row !");
            }
        }
        else {
          mHangxemodel.removeRow(r);
          listHangXeDaBan.add(jTable1.getValueAt(r,0) + " " + jTable1.getValueAt(r,1)+ " " +
                              jTable1.getValueAt(r,2) + " " + jTable1.getValueAt(r,3)+ " " +
                              jTable1.getValueAt(r,4) + " " + jTable1.getValueAt(r,5) + " " +
                              jTable1.getValueAt(r,6) );
        }     
        JOptionPane.showMessageDialog(rootPane, listHangXeDaBan);
  
    }         

Lỗi hiện lên sao khi Click vào Button trên

Exception in thread "AWT-EventQueue-0" java.lang.IndexOutOfBoundsException: Index: 1, Size: 1
	at java.util.ArrayList.rangeCheck(ArrayList.java:653)
	at java.util.ArrayList.get(ArrayList.java:429)
	at lt065a0006.HangXeModel.getValueAt(HangXeModel.java:48)
	at javax.swing.JTable.getValueAt(JTable.java:2717)
	at lt065a0006.View.BanActionPerformed(View.java:403)
	at lt065a0006.View.access$700(View.java:11)
	at lt065a0006.View$8.actionPerformed(View.java:149)
	at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
	at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
	at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
	at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
	at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
	at java.awt.Component.processMouseEvent(Component.java:6533)
	at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
	at java.awt.Component.processEvent(Component.java:6298)
	at java.awt.Container.processEvent(Container.java:2236)
	at java.awt.Component.dispatchEventImpl(Component.java:4889)
	at java.awt.Container.dispatchEventImpl(Container.java:2294)
	at java.awt.Component.dispatchEvent(Component.java:4711)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
	at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
	at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
	at java.awt.Container.dispatchEventImpl(Container.java:2280)
	at java.awt.Window.dispatchEventImpl(Window.java:2746)
	at java.awt.Component.dispatchEvent(Component.java:4711)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
	at java.awt.EventQueue.access$500(EventQueue.java:97)
	at java.awt.EventQueue$3.run(EventQueue.java:709)
	at java.awt.EventQueue$3.run(EventQueue.java:703)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
	at java.awt.EventQueue$4.run(EventQueue.java:731)
	at java.awt.EventQueue$4.run(EventQueue.java:729)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

Trong dãy lỗi em biết được trọng tâm lỗi nằm ở hàm public Object getValueAt(int rowIndex, int columnIndex) , nhưng em chưa biết cách để khắc phục lỗi này ra sao. Mong mọi người giúp đỡ ạ

public class HangXeModel extends AbstractTableModel{

    private String[] columns = {"Tháng", "Mã Xe", "Loại Xe", "Hãng Xe", "Nơi SX" , "Khối Lượng" , "Giá Xe"};
    private ArrayList <HangXe> listHangXe = new ArrayList<>();
    
    
    public void addHangXe(HangXe hx){
        listHangXe.add(hx);
        
        fireTableRowsInserted( listHangXe.size() - 1 , listHangXe.size() - 1);
    }

    public void removeRow(int i) {
        listHangXe.remove(i);
      //  listHangXeDaBan.add();
        fireTableRowsDeleted(i, i); 
    }

    @Override
    public void fireTableRowsDeleted(int i, int i1) {
        super.fireTableRowsDeleted(i, i1); //To change body of generated methods, choose Tools | Templates.
    }
    
    @Override
    public int getRowCount() {
        return listHangXe.size();
    }

    @Override
    public int getColumnCount() {
        return columns.length;
    }

    @Override
    public Object getValueAt(int rowIndex, int columnIndex) {
        HangXe hxe = listHangXe.get(rowIndex);
        switch(columnIndex){
            case 0 : return hxe.getThang();
            case 1 : return hxe.getMaXe();
            case 2 : return hxe.getLoaiXe();
            case 3 : return hxe.GetHangXe();
            case 4 : return hxe.getNoiSX();
            case 5 : return hxe.getKhoiLuong();
            case 6 : return hxe.getGiaXe();
            default: return null;
        }
    }
    
    @Override
    public String getColumnName(int colum) {
        return columns[colum];
    }
}