title: BigDecimal setScale and round
body: <p>What is the difference between this two call? (Is there any?)</p>
  
  <pre><code>// 1.
  new BigDecimal("3.53456").round(new MathContext(4, RoundingMode.HALF_UP));
  // 2.
  new BigDecimal("3.53456").setScale(4, RoundingMode.HALF_UP);
  </code></pre>