java编程 ——字符串截取问题1

题目要求：

                 要求输入一个字符串和一个字符长度，对该字符串进行分隔。

             public String[] split(String str,int chars){

                   int n = (str.length() + chars - 1) / chars;

                   String[] ret = new String[n];

                   for(int i = 0;i < n;i++){

                        if(i<n-1){

                            ret[i] = str.subString(i*chars,(i+1)*chars);

                        }else{

                            ret[i] = str.subString(i*chars);

                        }

                   }

                   return ret;

             }