怎么让代码输出Hello，并且只能改动change方法，main方法不能动

Question

import java.util.*;
public class HelloWorld {
public static void main(String[] args) {
String s="JavaHelloOK";
change(s);
System.out.println(s);
}
static void change(String ss){
ss=ss.substring(4,9);
}
}

Answer 1

供参考

https://blog.csdn.net/qq_60003652/article/details/119841331?utm_medium=distribute.pc_relevant.none-task-blog-2~default~baidujs_utm_term~default-0.pc_relevant_default&spm=1001.2101.3001.4242.1&utm_relevant_index=3