title: How to use the multireader API correctly in Lucene?
body: <p>I have several indexes, but wanted to know which way of using is correct.</p>
  
  <pre><code>IndexReader r1= IndexReader.open(...)
  IndexReader r2= IndexReader.open(...)
  MultiReader mr= new MultiReader(r1,r2)
  </code></pre>
  
  <p>1)</p>
  
  <pre><code>IndexSearcher s = new IndexSearcher(mr);
  </code></pre>
  
  <p>2)</p>
  
  <pre><code>IndexSearcher s = new IndexSearcher(mr,new IndexReader[]{r1,r2}....
  </code></pre>
  
  <p>Which one is correct?</p>