title: Java: Extract characters after a specific character
body: <p>I have urls in strings like below</p>
  
  <pre><code>http://www.example.com/abc?page=6
  http://www.example.com/abc?page=66
  http://www.example.com/abc?page=666
  </code></pre>
  
  <p>I want to extract only the page numbers i.e only the characters after "=" using string functions in java but do not know how to do this. Please help</p>
  
  <p>Thank you</p>