package innovimax.mixthem.rest;

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

@Path("/ping")
public class Ping {

    @GET
    @Produces(MediaType.TEXT_PLAIN)
    public String ping() {
        return "Welcome to MixThem REST application!";
    }

}

package innovimax.mixthem.rest;

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

@Path("/ping")
public class Ping {

    @GET
    @Produces(MediaType.TEXT_PLAIN)
    public String ping() {
        return "Welcome to MixThem REST services!";
    }

}

Update Ping.java