Unable to convert to java Object using GSON

Question

I have the following JSON , which i need to convert to Java Object

[{
 "emp": {
 "name": "pavan"
 },
 "dept": {
 "deptName": "cse"
 }
}]

I am trying to convert this JSON to Java Object using GSON Framework

public class Root {
 
 private Data data ;
 public Data getData() {
 return data;
 }
 public void setData(Data data) {
 this.data = data;
 }
}
public class Data {
 
 private Emp emp;
 private Dept dept;
 public void setEmp(Emp emp){
 this.emp = emp;
 }
 public Emp getEmp(){
 return this.emp;
 }
 public void setDept(Dept dept){
 this.dept = dept;
 }
 public Dept getDept(){
 return this.dept;
 }
}
public class Emp
{
 private String name;
 public void setName(String name){
 this.name = name;
 }
 public String getName(){
 return this.name;
 }
}
 public class Dept
{
 private String deptName;
 public void setDeptName(String deptName){
 this.deptName = deptName;
 }
 public String getDeptName(){
 return this.deptName;
 }

This is my Test class

public class Test {
 public static void main(String[] args) {
 // TODO Auto-generated method stub
 
 String json = "[{\r\n" + 
 " \"emp\": {\r\n" + 
 " \"name\": \"pavan\"\r\n" + 
 " },\r\n" + 
 " \"dept\": {\r\n" + 
 " \"deptName\": \"cse\"\r\n" + 
 " }\r\n" + 
 "}]";
 
 Gson gson = new Gson();
 
 Root[] root = gson.fromJson(json, Root[].class);
 
 System.out.println(root[0].getData());
 
 }

I am using GSON to convert json to Java Object I am getting null when i do the getData , can anybody please tell me why the conversion is not happening

• Bill Naylor: The emp field needs to be of a type which has a name field (of type String) and the dept field needs to be of a type which has a deptName field also od String. (in this simplistic setting with no annotation etc.)
• Thomas Jungblut: there's also no data field, so you might need to do Data[] root = gson.fromJson(json, Data[].class);

Answer 1

The Root class is redundant.

Change

 Root[] root = gson.fromJson(json, Root[].class);

to

 Data[] data= gson.fromJson(json, Data[].class);