Java check if int array is null

How to check null element if it is integer array in Java? Ask Question. Asked 11 years, 7 months ago. Active 5 years, 10 months ago.

Viewed 53k times. I'm using Eclipse for editor and the line that checks null element is showing error: Line that complains: if a[i]! Improve this question. Prince Meow Meow Add a comment. Active Oldest Votes. Improve this answer. Justin Ardini Justin Ardini 9, 2 2 gold badges 37 37 silver badges 46 46 bronze badges. Very interesting, I didn't know int and Integer are different..

Thanks for the tip! If you do have Integer[] and just want to check whether or not there is are any null elements, Arrays. IsEmpty — Narayan. On primitive vs reference types An int is a primitive type, which is distinct from a reference type.

References JLS 4. On Integer vs int java. Why does autoboxing in Java allow me to have 3 possible values for a boolean? One of the methods is isNull , which returns a boolean value if the provided reference is null, otherwise it returns false. We have created two classes - User1 and User2 as shown in the code below. In the main method, we created an object of the User2 class using the new keyword and called the getUser1Object method. It returns an object of class User1 , which we later store in getUser1Object.

Ti J Ti J 1 1 gold badge 6 6 silver badges 14 14 bronze badges. The exception says there is no element at this position in array. Show us the code where you add elements to array. First check the record. Is there a reason you arbitrarily accessed the 18 element?

I updated the content to provide some codes — Ti J. Show 3 more comments. Active Oldest Votes. Improve this answer. Add a comment. Subodh Joshi Subodh Joshi 11k 25 25 gold badges 92 92 silver badges bronze badges. Razib Razib Sunil Sunil 3 3 silver badges 11 11 bronze badges.

This will simply print "null is null" , which seems pretty silly. If you are working with Java 8 or higher version then you can use the stream method of Arrays class to call the allMatch method to check whether array contains null values or not. Null Array in Java In Java, an array is an object that holds similar types of data. We can use this example to check whether the array is null or not. This is the case when array contains null values. Arrays; import java.