https://stackoverflow.com › questions › 13747859

If you want an integer to be able to be null, you need to use Integer instead of int. Integer id; String name; public Integer getId() { return id; } Besides, the statement if(person.equals(null)) can't be true because if person is null, then a NullPointerException will be thrown.

https://www.baeldung.com › java-check-integer-null-or-zero

In this quick tutorial, we’ll learn a few different ways to check if a given Integer instance’s value is null or zero. For simplicity, we’re going to use unit test assertions to verify if each approach works as expected.

https://stackoverflow.com › questions › 41183668

It seems that you are using myInteger as an optional value. If that's the case, and you're in Java 8, then you can use an Optional<Integer> and write if (myOptInteger.orElse(0) != 0) –

https://www.delftstack.com › fr › howto › java › check-if-int-is-null-java

Dans ce guide, nous allons apprendre à vérifier si int est nul en java. Afin de comprendre ce concept, nous devons passer par une compréhension de base du type de données int. Plongeons dedans.

https://codingtechroom.com › tutorial › java-how-to-check-if-an-integer-is-null-or-zero-in...

The most straightforward way to check if an Integer is null or zero is with a simple if statement. Here's how you can do it: public class IntegerCheck {. public static void main ( String[] args) {. Integer number = null; // Change this value to test different scenarios if ( number == null) {.

https://www.w3docs.com › snippets › java › how-to-check-if-an-int-is-a-null.html

To check if an Integer is null, you can use the following code: Integer number = null; if (number == null) { // number is null . } else { // number is not null . } Alternatively, you can use the Java Optional class to safely check for a null value: Optional<Integer> optionalNumber = Optional.ofNullable(number);

https://throughjava.com › check-if-an-integer-value-is-null-or-zero-in-java

To use the ternary operator to check for Integer values, follow these steps. public static boolean usingTernaryOperator(Integer num) { return 0 == (num == null ? 0 : num); } The code above checks if the variable num is null.

https://www.codeease.net › programming › java › java-check-if-int-is-null

In Java, you can check if an int is null using the instanceof operator. The instanceof operator returns a boolean value indicating whether the object on the left-hand side of the operator is an instance of the class or interface on the right-hand side of the operator.

https://www.javaprogramto.com › 2021 › 12 › java-check-if-int-is-null.html

In this article, we've seen how int can be used to check value is null or not in java. Directly int value can not be checked as null and have to use the wrapper Integer class to check int value is null.