Java EE 8 Cookbook

How to do it...

1. First, we define a JSON message to represent a User object:

{  "user": {    "email": "[e-mail]",    "name": "Elder",    "profile": [      {        "id": 1      },      {        "id": 2      },      {        "id": 3      }    ]  }}

2. Now, we create a method to read it and print the values we want:

public class JPointer {    public static void main(String[] args) throws IOException{        try (InputStream is =         JPointer.class.getClassLoader().getResourceAsStream("user.json");                JsonReader jr = Json.createReader(is)) {            JsonStructure js = jr.read();            JsonPointer jp = Json.createPointer("/user/profile");            JsonValue jv = jp.getValue(js);            System.out.println("profile: " + jv);        }    }}

The execution of this code prints the following:

profile: [{"id":1},{"id":2},{"id":3}]