JSON :- JavaScript Object Notation It contains key/value pairs Key-> Strings Values:->JSON {}   :-> JSON Object []    :-> JSON array Syntax : { "employees" :[     { "firstName" : "John" ,  "lastName" : "Doe" },     { "firstName" : "Anna" ,  "lastName" : "Smith" },     { "firstName" : "Peter" ,  "lastName" : "Jones" } ]} package csdevbin.json; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.widget.TextView; import org.json.JSONObject; public class MainActivity extends AppCompatActivity {     public static final String JSON_STRING = "{ \" employee \" :{ \" name \" : \" John \" , \" salary \" :6000}}" ;     @Override     public void onCreate(Bundle savedInstanceState) {         super .onCreat