Adicionando elementos num jtable com arraylist

class MyTableModel extends AbstractTableModel {
		    private String[] columnNames = {"Coluna"};
		    private ArrayList data; 
		    
		    public int getColumnCount() {
		        return columnNames.length;
		    }

		    public int getRowCount() {
		        return data.size();
		    }

		    public String getColumnName(int col) {
		        return columnNames[col];
		    }

		    public Object getValueAt(int row, int col) {
		        return data[row][col];
		        
		    }
		}	
			JTable jt = new JTable();
		
		jt.setRowSelectionAllowed(false);
		jt.setModel(new MyTableModel());
		
		jcp=new JScrollPane();
		jcp.setBackground(Color.blue);
		jcp.setBounds(10,40,500,200);
		jcp.setViewportView(jt);
		principal.add(jcp);

public class TelefoneTableModel extends AbstractTableModel {

    private List<TelefoneTO> telefones;
    private String[] colunas = {"Tipo", "Numero"};

    public TelefoneTableModel(List<TelefoneTO> telefones) {
        setTelefones(telefones);
    }

    public TelefoneTableModel() {
        getTelefones();
    }

    @Override
    public int getColumnCount() {
        return 2;
    }

    @Override
    public int getRowCount() {
        return telefones.size();
    }

    @Override
    public String getColumnName(int column) {
        return colunas[column];
    }

    @Override
    public Object getValueAt(int rowIndex, int columnIndex) {
        TelefoneTO telefoneTO = telefones.get(rowIndex);
        switch (columnIndex) {
            case 0:
                return telefoneTO.getTipoTelefone();
            case 1:
                return telefoneTO.getTel();
        }
        return null;
    }

    public List<TelefoneTO> getTelefones() {
        if (telefones == null) {
            telefones = new ArrayList<TelefoneTO>();
        }
        return telefones;
    }

    public void setTelefones(List<TelefoneTO> telefones) {
        this.telefones = telefones;
    }
}