What is ObjectUtils.allNotNull in Java?
allNotNull() is a ObjectUtils class that is used to check if all of the values in the array do not point to a null reference.
- The method returns
falseif any value isnullor the array itself points tonull. - The method returns
trueif all elements in the array are notnullor the array is empty.
How to import ObjectUtils
The definition of ObjectUtils can be found in the Apache Commons Lang package, which we can add to the Maven project by adding the following dependency to the pom.xml file.
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.12.0</version>
</dependency>
For other versions of the commons-lang package, refer to the Maven Repository.
You can import the ObjectUtils class as follows.
import org.apache.commons.lang3.ObjectUtils;
Syntax
public static boolean allNotNull(final Object... values)
Parameters
final Object... values: The list of objects to test.
Return value
The allNotNull method returns true if all of the objects in the list are not null or if the array is empty. Otherwise, it returns false.
Code
import org.apache.commons.lang3.ObjectUtils;import java.util.Arrays;public class Main {public static void main(String[] args) {Object[] objects = {"hi", 3, 3.24};System.out.printf("The output of ObjectUtils.allNotNull() for the string - '%s' is %s", Arrays.toString(objects), ObjectUtils.allNotNull(objects));System.out.println();objects = null;System.out.printf("The output of ObjectUtils.allNotNull() for the string - '%s' is %s", Arrays.toString(objects), ObjectUtils.allNotNull(objects));System.out.println();objects = new Object[]{null, null, null};System.out.printf("The output of ObjectUtils.allNotNull() for the string - '%s' is %s", Arrays.toString(objects), ObjectUtils.allNotNull(objects));System.out.println();objects = new Object[]{1.2, null, null};System.out.printf("The output of ObjectUtils.allNotNull() for the string - '%s' is %s", Arrays.toString(objects), ObjectUtils.allNotNull(objects));System.out.println();objects = new Object[0];System.out.printf("The output of ObjectUtils.allNotNull() for the string - '%s' is %s", Arrays.toString(objects), ObjectUtils.allNotNull(objects));System.out.println();}}
Example 1
objects = ["hi", 3, 3.24]
The method returns true because all of the objects in the list are not null.
Example 2
objects = null
The method returns false because the array/list of objects points to null.
Example 3
objects = [null, null, null]
The method returns false because all the values in the array/list of objects point to null.
Example 4
objects = [1.2, null, null]
The method returns false because at least one of the objects in the list is null.
Example 5
objects = []
The method returns true because the array/list of objects is empty.
Output
The output of the code will be as follows.
The output of ObjectUtils.allNotNull() for the string - '[hi, 3, 3.24]' is true
The output of ObjectUtils.allNotNull() for the string - 'null' is false
The output of ObjectUtils.allNotNull() for the string - '[null, null, null]' is false
The output of ObjectUtils.allNotNull() for the string - '[1.2, null, null]' is false
The output of ObjectUtils.allNotNull() for the string - '[]' is true
