Java - Cancelar edición celdas JTable

DefaultTableModel modelo = new DefaultTableModel(){

    public boolean isCellEditable(int rowIndex,int columnIndex){return false;}

};

JTable tabla = new JTable (modelo);

DefaultTableModel modelo = new DefaultTableModel(i,j){

        public boolean isCellEditable(int rowIndex,int columnIndex){return false;}

};

JTable tabla = new JTable (modelo);

Object[][] data={{"a1","a2"},{"b1","b2"},{"c1","c2"}};

String [] columnas={"a","b"};

DefaultTableModel modelo = new DefaultTableModel(data,columnas){

    public boolean isCellEditable(int rowIndex,int columnIndex){return false;}

};

JTable tabla = new JTable (modelo);

String[] s=new String[]{"d1","d2"};

modelo.addRow(s);