title: How to read all keys in Json without specifying keyname using java
body: <p>Trying to read Json Message like below</p>
  
  <pre><code>{
    "employees": [
      {
        "firstName": "John",
        "lastName": "Doe"
      },
      {
        "firstName": "Anna",
        "lastName": "Smith"
      },
      {
        "firstName": "Peter",
        "lastName": "Jones"
      }
    ]
  }
  </code></pre>
  
  <p>I want to read all keynames like employees,firstName,lastName etc.. in java.
  in XML we do this while parsing we specify * in dom object and get all node names, how to do this in java?</p>