title: Are strings created with + concatenation stored in the string pool?
body: <p>For instance</p>
  
  <pre><code> String s = "Hello" + " World";
  </code></pre>
  
  <p>I know there are two strings in the pool "Hello" and "World" but, does: "Hello World" go into the string pool?</p>
  
  <p>If so, what about? </p>
  
  <pre><code>String s2 = new String("Hola") + new String(" Mundo");
  </code></pre>
  
  <p>How many strings are there in the pool in each case?</p>