Menu
Does Java guarantee array initialization?
Let's say I use the code char[] uuid = new char[36];, would each element be guaranteed to be initialized to 0?
579
Array Initialization in Java This allocates the memory for an array of size 10 . This size is immutable. Java populates our array with default values depending on the element type - 0 for integers, false for booleans, null for objects, etc. Let's see more of how we can instantiate an array with values we want.
if the elements in the array are integers (int), each element in the array will be automatically initialized to 0. if the elements in the array are Strings, each element will be initialized to the null character (null). if the elements in the array are boolean, each element will be initialized to false.
Initializing an arrayIn order to store values in the array, we must initialize it first, the syntax of which is as follows: datatype [ ] arrayName = new datatype [size]; There are a few different ways to initialize an array. Look at the following examples to get a better idea about array initialization.
Array elements are initialized to 0 if they are a numeric type ( int or double ), false if they are of type boolean , or null if they are an object type like String .
Yes. JLS §10.3 ensures that all elements of an array are set to their initial values, which by JLS §4.12.5 is guaranteed to be 0, false, or null.
166
Yes, it does guarantee initialization. JLS section 10.3
2
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
