Java: String.split omits trailing empty strings
September 04, 2008 18:34:25 Last update: July 14, 2011 07:31:48
The one argument version of
Output:
String.split omits trailing empty strings. To get all parts, including trailing empty strings, you need to use the two argument version with a negative limit:
public class TestStringSplit { public static void main(String[] args) throws Exception { String s = "1,2,,,,,,3 4 5,,,,,,"; // one argument split, trailing empty strings are omitted. String[] a = s.split(","); System.out.println("Length of array: " + a.length); for (int i = 0; i < a.length; i++) { System.out.println("Part[" + i + "]: '" + a[i] + "'"); } // use negative second argument to get all parts, including empty ones // at the end. a = s.split(",", -1); System.out.println("\n======\nLength of array: " + a.length); for (int i = 0; i < a.length; i++) { System.out.println("Part[" + i + "]: '" + a[i] + "'"); } } }
Output:
Length of array: 8 Part[0]: '1' Part[1]: '2' Part[2]: '' Part[3]: '' Part[4]: '' Part[5]: '' Part[6]: '' Part[7]: '3 4 5' ====== Length of array: 14 Part[0]: '1' Part[1]: '2' Part[2]: '' Part[3]: '' Part[4]: '' Part[5]: '' Part[6]: '' Part[7]: '3 4 5' Part[8]: '' Part[9]: '' Part[10]: '' Part[11]: '' Part[12]: '' Part[13]: ''
