title: How to find specified name and its value in JSON-string from Java?
body: <p>Let's assume we have the next JSON string:</p>
  
  <pre><code>{  
     "name" : "John",
     "age" : "20",
     "address" : "some address",
     "someobject" : {
         "field" : "value"    
     }
  }
  </code></pre>
  
  <p>What is the easiest (but still correct, i.e. regular expressions are not acceptable) way to find field <code>age</code> and its value (or determine that there's no field with given name)? </p>
  
  <p>p.s. any open-source libs are ok.</p>
  
  <p>p.s.2: please, don't post links to the libraries - it's not a useful answer. 'Show me the code'(c).</p>