Java - Necesito su ayuda lo antes posible porfavor!

public Laboratorio31() {

    super("Hola mundo");

    Object[][]data={

        {"Juan","Tercero Basico","Matematica",new Integer(95),new Integer(85),new Integer(70),new Integer(100), },

        {"=","=","Comunicacion Y lenguaje",new Integer(75),new Integer(70),new Integer(80),new Integer(95), },

        {"=","=","Quimíca",new Integer(75),new Integer(70),new Integer(80),new Integer(95), },

        {"=","=","Fisica Fundamental",new Integer(65),new Integer(70),new Integer(71),new Integer(85), },

         {"=","=","Deportes",new Integer(95),new Integer(90),new Integer(96),new Integer(98), },

          {"=","=","Tics",new Integer(65),new Integer(70),new Integer(86),new Integer(78), },

    };

    String[]columnNames={"Nombre"," Grado","Materia",

                         "Unidad 1","Unidad 2 ","Unidad 3 ","Unidad 4 "};

    final JTable table=new JTable(data,columnNames);

    table.setPreferredScrollableViewportSize(new Dimension(900,1000));

    JScrollPane scrollPane=new JScrollPane(table);

    getContentPane().add(scrollPane, BorderLayout.CENTER);

    addWindowListener(new WindowAdapter(){

        public void windowClosing(WindowEvent e){

            System.exit(0);

        }

    });

}

    public static void main(String[] args) {

        Laboratorio31 frame=new Laboratorio31();

       frame.pack();

       frame.setVisible(true);

    }

}