package com.xyz.model;
import org.codehaus.jackson.annotate.JsonIgnoreProperties;
import org.codehaus.jackson.map.annotate.JsonSerialize;

@JsonSerialize(include = JsonSerialize.Inclusion.NON_NULL)
@JsonIgnoreProperties(ignoreUnknown = true)


public class Register {
    private String Name;
    private String Email;
    private String Password;

        public String getName() {
            return Name;
        }

        public void setName(String Name) {
            this.Name = Name;
        }
    //other getter and setter

    public Register()
    {}
}

public String Register(Register reg) {

        String url = URL + "/users";

        String name = reg.getName();
        String email = reg.getEmail();
        String password = reg.getPassword();
        JSONObject jsondata = new JSONObject();
        jsondata.put("Name", name);
        jsondata.put("Email", email);
        jsondata.put("Password", password);

        HttpEntity<?> requestEntity = new Connection().getConnection(jsondata
                .toString());
//......code for connection to url..


        } catch (Exception e) {
            System.out.println("failed"+e.getMessage());

        }

failed Could not read JSON: Can not instantiate value of type [simple type, class com.xyz.model.Register] from JSON integral number; no single-int-arg constructor/factory method; nested exception is org.codehaus.jackson.map.JsonMappingException: Can not instantiate value of type [simple type, class com.xyz.model.Register] from JSON integral number; no single-int-arg constructor/factory method.