" ".split(" ") generates a NullPointerException : String Split « Data Type « Java Tutorial

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Java Tutorial » Data Type » String Split

2. 32. 4. " ".split(" ") generates a NullPointerException


public class Main {

  public static void main(String args[]) throws Exception {



    String[] words = " ".split(" ");

    String firstWord = words[0];

    System.out.println(firstWord);

  }

}

/*



Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0

  at Main.main(Main.java:5)

*/

2. 32. String Split
	2. 32. 1.	Split string
	2. 32. 2.	Split a String
	2. 32. 3.	Using split() with a space can be a problem
	2. 32. 4.	" ".split(" ") generates a NullPointerException
	2. 32. 5.	String.split() is based on regular expression
	2. 32. 6.	String split on multicharacter delimiter
	2. 32. 7.	Split by dot
	2. 32. 8.	Split up a string into multiple strings based on a delimiter
	2. 32. 9.	Splits a string around matches of the given delimiter character.
	2. 32. 10.	Splits the provided text into an array, separator string specified. Returns a maximum of max substrings.
	2. 32. 11.	Splits the provided text into an array, using whitespace as the separator, preserving all tokens, including empty tokens created by adjacent separators.

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