contains() is an instance method of the Range class used to check whether or not the specified element is present in the Range object.
RangeThe definition of Range can be found in the Apache Commons Lang package. We can add this package 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 Range class using the following command:
import org.apache.commons.lang3.Range;
public boolean contains(final T element)
final T element: The element to check.This method returns true if the element is within the bounds of the range object. Otherwise, it returns false.
import org.apache.commons.lang3.Range;public class Main{public static void main(String[] args) {int fromValue = 100;int toValue = 200;Range<Integer> range = Range.between(fromValue, toValue);System.out.printf("Range object - %s\n", range);// Example 1int valueToCheck = 4;System.out.printf("%s in [%s, %s] = %s", valueToCheck, fromValue, toValue, range.contains(valueToCheck));System.out.println();// Example 2valueToCheck = 150;System.out.printf("%s in [%s, %s] = %s", valueToCheck, fromValue, toValue, range.contains(valueToCheck));}}
Bounds of the Range object - [100..200]element to check - 4The method returns false because the element to check is not within the bounds of the range object.
Bounds of the Range object - [100..200]element to check - 150The method returns true because the element to check is within the bounds of the range object.
The output of the code will be as follows:
Range object - [100..200]
4 in [100, 200] = false
150 in [100, 200] = true