title: what do the square brackets mean? in Java
body: <p>What does it mean when there are square brackets in front of <code>double</code>. For example <code>double[]</code>?
  Is there any special way to use the return function when using them in a method.</p>
  <p>For example:</p>
  <pre><code>public double[] MethodName(){
  
  }
  </code></pre>
  <p>What is the type of the return value?</p>