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Fill Character List From ASCII Table And Sort

/ Published in: Java
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FIll a List with ASCII (0-127) characters with a given number of characters.

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  1. private List<Character> initCharacterList(int numberOfCharacters, int asciiStart, int asciiEnd) {
  2. 	// first ensure ascii table values
  3. 	assertTrue("asciiStart is invalid", asciiStart >= 0 && asciiStart < asciiEnd);
  4. 	assertTrue("asciiEnd is invalid", asciiEnd <= 127 && asciiEnd > asciiStart);
  5.  
  6. 	List<Character> list = new ArrayList<>();
  7.  
  8. 	int asciiPos = asciiStart;
  9.  
  10. 	for (int i = 0; i < numberOfCharacters; i++) {
  11. 		Character c = new Character((char)asciiPos);
  12. 		list.add(c);
  13. 		asciiPos++;
  14. 		if (asciiPos > asciiEnd) {
  15. 			asciiPos = asciiStart;
  16. 		}
  17. 	}
  18.  
  19. 	Collections.sort(list);
  20.  
  21. 	return list;
  22. }

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