import jist.runtime.JistAPI;
class hello implements JistAPI.Entity
{
    public static void main(String[] args)
    {
        System.out.println("simulation start");
        hello h = new hello();
        h.myEvent();
    }

    public void myEvent()
    {
        JistAPI.sleep(1);
        myEvent();
        System.out.println("hello world, t=" + JistAPI.getTime());
    }
}

import jist.runtime.JistAPI;//引入包
class hello implements JistAPI.Entity//定义类
{
    public static void main(String[] args)//main主函数
    {
        System.out.println("simulation start");//输出语句
        hello h = new hello();//
        h.myEvent();
    }

    public void myEvent()
    {
        JistAPI.sleep(1);
        myEvent();
        System.out.println("hello world, t=" + JistAPI.getTime());
    }
}

import jist.runtime.JistAPI;//引入包
class hello implements JistAPI.Entity//定义类，implements 是实现JistAPI.Entity接口
{
    public static void main(String[] args)//main主函数，程序由此运行
    {
        System.out.println("simulation start");//输出语句
        hello h = new hello();//生成一个对象
        h.myEvent();//调用该对象的myEvent()方法
    }

    public void myEvent()//定义一个方法
    {
        JistAPI.sleep(1);
        myEvent();
        System.out.println("hello world, t=" + JistAPI.getTime());
    }
}