public int lookupFloat( final float n ) {

        final int bits = Float.floatToIntBits(n);

        for (int i = 1; i < index; i++) {

            if (constants[i] instanceof ConstantFloat) {

                final ConstantFloat c = (ConstantFloat) constants[i];

                if (Float.floatToIntBits(c.getBytes()) == bits) {

                    return i;

                }

            }

        }

        return -1;

    }