Question

The split method in the String class returns an array of strings consisting of the substrings split by the delimiters. However, the delimiters are not returned. Implement the following new method that returns an array of strings consisting of the substrings split by the matching delimiters, including the matching delimiters.
public static String[] split(String s, String regex)
For example, split("ab#12#453", "#") returns ab, #, 12, #, 453 in an array of String, and split("a?b?gf#e", "[?#]") returns a, ?, b, ?, gf, #, and e in an array of String.
Write a test program to show that your split method works properly.

PLEASE DO THE QUESTION IN A SIMPLER WAY

Answer 1

Please find the answer below.
Please do comments in case of any issue. Also, don't forget to rate the question. Thank You So Much.

SubstringOperator.java

package c15;

import java.util.Arrays;

public class SubstringOperator {

   public static String[] split(String s, String regex) {
       int count=0;
       for(int i=0;i<s.length();i++) {
           if(regex.indexOf(s.charAt(i))!=-1) {
               count++;
           }
       }
       int size = count*2+1;
       String res[] = new String[size];
       String tmp;
       int storeCount=0;
       for(int i=0;i<s.length();i++) {
           int index=regex.indexOf(s.charAt(i));
           if(index!=-1) {
               tmp = s.substring(0,i);
               res[storeCount] = tmp;
               storeCount++;
               res[storeCount] = s.charAt(i)+"";
               s = s.substring(i+1);
               storeCount++;
               i=0;
           }
       }
       res[storeCount] = s;
       return res;
   }
   public static void main(String[] args) {
       String res[] = split("a?b?gf#e", "[?#]");
       System.out.println(Arrays.toString(res));
      
       String res2[]=split("ab#12#453", "#");
       System.out.println(Arrays.toString(res2));
      
   }
}

output