What is Objects.nonNull in Java?
Overview
The nonNull method is a static method of the Objects class in Java that checks whether the input object reference supplied to it is non-null or not.
- If the passed object is non-null, then the method returns
true. - If the passed object is
null, then the method returnsfalse.
This method was introduced in Java 8. To use the nonNull method, import the following module.
java.util.Objects
Syntax
public static boolean nonNull(Object obj)
Parameters
This method takes one parameter, Object obj, an object reference to be checked against null.
Examples
In the code below, a non-null string object is passed to the nonNull method and returns true.
import java.util.Objects;public class Main {public static void main(String[] args) {String s = "hello";System.out.println(Objects.nonNull(s));}}
In the code below, null is passed to the nonNull method and returns false.
import java.util.Objects;public class Main {public static void main(String[] args) {System.out.println(Objects.nonNull(null));}}
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