NetBeansでJava WebAPI(JAX-RS jersey) ref: http://qiita.com/kaishero/items/c699c63619a76992b6f8

NewClass.java

package javasample.jaxrswebapi;

import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;

@Path("/")
public class NewClass {

    @GET
    @Produces(MediaType.TEXT_PLAIN)
    public String getMethod() {
        return "OK";
    }
}