### Question:
SimpleVectorMath { public static void normalize(float[] x) { double norm = norm(x); for (int i = 0; i < x.length; i++) { x[i] /= norm; } } private  SimpleVectorMath(); static double dot(float[] x, float[] y); static double norm(float[] x); static void normalize(float[] x);  }### Answer:
@Test public void testNormalize() { float[] vec = {-1.0f, 2.5f, 3.0f}; SimpleVectorMath.normalize(vec); assertEquals(1.0f, (float) SimpleVectorMath.norm(vec)); assertEquals((float) SimpleVectorMath.norm(VEC1), (float) SimpleVectorMath.dot(vec, VEC1)); }