title: issue in adding two arraylist
body: <p>I have two arrayList</p>
  
  <pre><code>ArrayList ar1 = new ArrayList();
  ArrayList ar2 = new ArrayList();
  </code></pre>
  
  <p><strong>ar1</strong> is having values { A,B,C,D}
  and <strong>ar2</strong> is having values {1,2,3,4}</p>
  
  <p>I want to add these two array list such that
  output should be </p>
  
  <p>A 1
  B 2
  C 3
  D 4</p>
  
  <p>I have used
  ar1.addrange(ar2);
  and the output is like this
  A
  B
  C
  D
  1
  2
  3
  4</p>
  
  <p>Any suggestions how to resolve this?</p>