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1. What will be the output of the program? public class Test { private static int[] x; public static void main(String[] args) { System.out.println(x[0]); } }





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  • By: guest on 02 Jun 2017 01.26 am
    In the above code the array reference variable x has been declared but it has not been instantiated i.e. the new statement is missing, for example: private static int[]x = new int[5]; private static int[x] declares a static i.e. class level array. the "new" keyword is the word that actually creates said array. int[5] in association with the new sets the size of the array. so since the above code contains no new or size decalarations when you try and access x[0] you are trying to access a member of an array that has been declared but not intialized hence you get a NullPointerException at runtime.
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