Error in Java, "Can not inherit from final class error"

I get this error, I'm using some zxing libraries.

java.lang.VerifyError: Cannot inherit from final class
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
at java.lang.Class.getMethod0(Class.java:3018)
at java.lang.Class.getMethod(Class.java:1784)
at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526)

The code that I execute is the following:

public static void main(String[] args) {
    InputStream barCodeInputStream;
    try {
        String IMG_PATH = "Ruta:\imagen.png";
        barCodeInputStream = new FileInputStream(IMG_PATH);
        BufferedImage barCodeBufferedImage = ImageIO.read(barCodeInputStream);

       // LuminanceSource source = new BufferedImageLuminanceSource(barCodeBufferedImage);
       BufferedImageLuminanceSource  source = new BufferedImageLuminanceSource(barCodeBufferedImage);
        BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));

        Reader reader = new MultiFormatReader();
        Result result = reader.decode(bitmap);


        System.out.println("Barcode text is " + result.getText());

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

I think it falls on the next line:

BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));

That class contains the following:

public final class BinaryBitmap {

   private final Binarizer binarizer;
   private BitMatrix matrix;

   public BinaryBitmap(Binarizer binarizer) {
       if (binarizer == null) {
          throw new IllegalArgumentException("Binarizer must be non-null.");
       }
       this.binarizer = binarizer;
   }

And more methods.

Edit 2:

The Binarizer class:

public abstract class Binarizer {

  private final LuminanceSource source;

  protected Binarizer(LuminanceSource source) {
     this.source = source;
  }

  public final LuminanceSource getLuminanceSource() {
     return source;
  }

  public final int getWidth() {
     return source.getWidth();
  }

  public final int getHeight() {
     return source.getHeight();
  }

}