public void actionPerformed(ActionEvent arg0) {
		
		fc = new JFileChooser();
		FileFilter filter1 = new ExtensionFileFilter("T, ND, NH", new String[] {
				"T", "ND", "NH" });
		fc.setFileFilter(filter1);

		// fc.getSelectedFile().getName().endsWith("T");

		int seleccion = fc.showOpenDialog(null);

		if (seleccion == JFileChooser.APPROVE_OPTION) {
			File fichero = fc.getSelectedFile();
			BufferedReader br = null;
			//interfaz.getAreaTexto().enable(true);
			try {
				br = new BufferedReader(new FileReader(fichero));
				String linea = null;
				String lineaTotal = "";
				try {
					linea = br.readLine();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				try {
					while (linea != null) {

						lineaTotal = lineaTotal + linea
								+ System.getProperty("line.separator");

						linea = br.readLine();
					}

					interfaz.getAreaTexto().setText(lineaTotal);

					/*if (fichero.getName().endsWith("ND")) {
						interfaz.getAreaTexto().setWrapStyleWord(true);

					}*/

					br.close();

				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}

			} catch (FileNotFoundException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} finally {
				try {
					br.close();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}

		}

	

	}

	private Interfaz interfaz;
	private JFileChooser fc;

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
   at abrirArchivo.actionPerformed(AbrirArchivo.java:117)
   at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
   at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
   at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
   at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
   at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
   at java.awt.Component.processMouseEvent(Unknown Source)
   at javax.swing.JComponent.processMouseEvent(Unknown Source)
   at java.awt.Component.processEvent(Unknown Source)
   at java.awt.Container.processEvent(Unknown Source)
   at java.awt.Component.dispatchEventImpl(Unknown Source)
   at java.awt.Container.dispatchEventImpl(Unknown Source)
   at java.awt.Component.dispatchEvent(Unknown Source)
   at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
   at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
   at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
   at java.awt.Container.dispatchEventImpl(Unknown Source)
   at java.awt.Window.dispatchEventImpl(Unknown Source)
   at java.awt.Component.dispatchEvent(Unknown Source)
   at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
   at java.awt.EventQueue.access$000(Unknown Source)
   at java.awt.EventQueue$3.run(Unknown Source)
   at java.awt.EventQueue$3.run(Unknown Source)
   at java.security.AccessController.doPrivileged(Native Method)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
   at java.awt.EventQueue$4.run(Unknown Source)
   at java.awt.EventQueue$4.run(Unknown Source)
   at java.security.AccessController.doPrivileged(Native Method)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
   at java.awt.EventQueue.dispatchEvent(Unknown Source)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
   at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
   at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
   at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
   at java.awt.EventDispatchThread.run(Unknown Source)

	private JTextArea areaTexto = new JTextArea();

	public JTextArea getAreaTexto() {
		return areaTexto;
	}

		abrir.addActionListener(new abrirArchivo());