Echo.java

package teste;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;

@Path("/echo")
public class Echo {

    @GET
    @Path("/{id}")
    @Produces("application/json")
    public Pojo x(@PathParam("id") int k){
        return new Pojo(k);
    }
}