Question

如何用innerHTML向一个li中添加多个嵌套的div

Answer 1

public static String subStr(String str, int length) throws RuntimeException{
if(str==null){
throw new NullPointerException("字符串为null");
}
int len = str.length();
if(len<Math.abs(length)){
throw new StringIndexOutOfBoundsException("最大长度为"+len+"，索引超出范围为:"+(len-Math.abs(length)));
}
if(length>=0){
return subStr(str, 0,length);
}else{
return subStr(str, len-Math.abs(length), len);
}
}

追问

看不懂这是什么语法唉，js如何实现

那个li是标签，列表标签

已经知道了谢谢