FirstSessionBean.java

package com.supinfo.java;

import javax.ejb.Remote;

@Remote
public interface FirstSessionBean {
    public String sayHello();
}

FirstSessionBeanImpl.java

package com.supinfo.java;

import javax.ejb.Stateless;

@Stateless
public class FirstSessionBeanImpl implements FirstSessionBean {

    public String sayHello() {
        return "Hello";
    }

}