title: Java loop through JSON array and edit values
body: <p>i have a Json array,on each object i want to edit the values of a specific keys accordingly</p>
  
  <p>For example how can i loop through this array and edit the "unix_time" key of each object.</p>
  
  <pre><code>[{"_id":"","__v":0,"read":false,"timestamp":"","unix_time":"1477924542020"},
  {"_id":"","__v":0,"read":false,"timestamp":"","unix_time":"1477924542020"},
  {"_id":"","__v":0,"read":false,"timestamp":"","unix_time":"1477924532440"}, 
  ...
  ...
  ... ]
  </code></pre>