Ellipsoid { public double getVolume() { return (4.0 / 3.0) * Math.PI * a * b * c; } Ellipsoid(final double a, final double b, final double c);  Ellipsoid(final Vector3dc u, final Vector3dc v, final Vector3dc w); double getA(); void setA(final double a); double getB(); void setB(final double b); double getC(); void setC(final double c); Vector3d getCentroid(); void setCentroid(final Vector3dc centroid); Matrix4d getOrientation(); void setOrientation(final Matrix3dc semiAxes); List<Vector3d> getSemiAxes(); double getVolume(); @SuppressWarnings("unchecked") void initSampling(final OpEnvironment ops); List<Vector3d> samplePoints(final long n); void setSemiAxes(final Vector3dc u, final Vector3dc v,
		final Vector3dc w);  }
@Test public void testGetVolume() { final double a = 2.3; final double b = 3.14; final double c = 4.25; final double expectedVolume = (4.0 / 3.0) * Math.PI * a * b * c; final Ellipsoid ellipsoid = new Ellipsoid(a, b, c); assertEquals(expectedVolume, ellipsoid.getVolume(), 1e-12); }