question about rest-api error or my mistake - rest

Question

I'm just a newbie in java, rest-api; so i'm trying to build a simple restful-api project used java, eclipse, and wildfly 10. The project was deployed but i cannot call the API via browser by URL. Do i have mistake or configuration has not been set ? Someone help me please, many thanks.
i am not good at english as well, so apologize if it's hard to understand
package it_kickstart;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
#Path("/rest")
public class KickStartService {
#GET
#Path("/html")
#Produces("text/html")
public String getHTML() {
return "<p>JAX-WS with JBoss WildFly 10.x</p>";
}
#GET
#Path("/text")
#Produces("text/plain")
public String getText() {
return "JAX-WS with JBoss WildFly 10.x";
}
}
my web.xml:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
<display-name>Rest_API_1</display-name>
</web-app>
URL used to call : http://localhost:8080/Rest_API_1/rest/html