Cannot instantiate the type ResteasyClientBuilder

Question

I am trying to build a simple Resteasy client, using proxy framework. I am getting a error, "Cannot instantiate the type ResteasyClientBuilder". This is the Client class.

package com.RestClient.Clients;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.UriBuilder;
import org.jboss.resteasy.client.jaxrs.ResteasyClient;
import org.jboss.resteasy.client.jaxrs.ResteasyClientBuilder;
import org.jboss.resteasy.client.jaxrs.ResteasyWebTarget;

import com.RestClient.Models.Student;

public class ClientClass {
    ResteasyClient client;
    ResteasyWebTarget base_target,student_target;
    ClientInterface proxy;
    public ClientClass() {
        client = new ResteasyClientBuilder().build();<---------error
        base_target = client.target(UriBuilder.fromPath("http://localhost:8080/demorest/webresources/"));
        student_target = base_target.path("students");
    }
    public int registerStudent(Student s) {
        Response res = proxy.createStudent(s);
        return res.getStatus();
        
    }
}

I was following this tutorial.

Hyperbolic

Answer 1

Version 4.0.0 of RestEasy Client converted ResteasyClientBuilder to an abstract class and provided ResteasyClientBuilderImpl as the actual implementation that you're looking for.

But you should be using the new builder when generating a client.

client = ClientBuilder.newBuilder().build();
base_target = client.target("http://localhost:8080/demorest/webresources/");

Batory

The ResteasyClientBuilderImpl is internal implementation detail. Use ClientBuilder.newBuilder() instead (see docs.jboss.org/resteasy/docs/5.0.1.Final/userguide/html/…). – Definitive