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