Jersey Client API - get application/json

Here is the code sample:

Client client = Client.create();
WebResource webResource = client.resource("http://localhost:8080/punya/testJson/22");
Builder b = webResource.accept("application/json");
String s = "";
if (b != null) {
try {
s = b.get(String.class);
} catch (Exception ex) {
System.out.println("Exception:" + ex);
}
} else {
System.out.println("Return data is null");
}
System.out.println("Return string=" + s);
ResponseBuilder builder = Response.ok("SUCCESS");
return builder.build();