public class MyObj {
    private String id;
    private String name;
    private String address;
    private String img;
    private List<String> services;
    private List<Float> point;

@Override
	public String toString() {
		return "MyObj [id=" + id + ", name=" + name + ", address=" + address
				+ ", img=" + img + ", services=" + services.toString() + ", point=" + point.toString()
				+ "]";
	}

    	String myObjJson = null;
    	try {
    		myObjJson = objectMapper.writeValueAsString(myObj);
    	} catch (JsonProcessingException e) {
    		e.printStackTrace();
    	}
    	System.out.println(MyObjJson);