Java多线程：在run方法中每隔一百毫秒打印一句话

package com.company;


public class Usecase3 extends Thread{
    int index=0;
    String[] str={"Hello","Java","world","study","我要学习Java语言","Java编程词典能够伴随我学习，工作以及独立研发"};
    public void run(){
        while (true){
            System.out.println(str[index++%6]);
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
    public static void main(String[] args){
        new Usecase3().start();
    }

}