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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		String string = "Youremail@gmail.comAnotheremail@gmail.comSomeemail@gmail.com";
  13.  
  14.         int prevPos = 0, nextPos;
  15.         List<String> emailList = new ArrayList<>();
  16.         final String SEARCH_STR = "@gmail.com";
  17.         final int SEARCH_STR_LENGTH = SEARCH_STR.length();
  18.  
  19.         /**** start code *****/
  20.         while (true) {
  21.             nextPos = string.indexOf(SEARCH_STR, prevPos);
  22.             if (nextPos == -1)
  23.                 break;
  24.  
  25.             emailList.add(string.substring(prevPos, nextPos + SEARCH_STR_LENGTH));
  26.             prevPos = nextPos + SEARCH_STR_LENGTH;
  27.         }
  28.         /**** end code *****/
  29.  
  30.         for (String test : emailList) {
  31.             System.out.println(test);
  32.         }
  33.  
  34. 	}
  35. }
Success #stdin #stdout 0.09s 320576KB
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Standard input is empty
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Youremail@gmail.com
Anotheremail@gmail.com
Someemail@gmail.com
https://ideone.com/OkRYll
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
public

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