Java Guava | Bytes.contains() method with Examples

Last Updated : 11 Jul, 2025
Bytes.contains() method of Guava's Bytes Class accepts two parameters array and target. The method is used to check if the target element is present in the array or not. Syntax: 
public static boolean contains(byte[] array,
                               byte target)
Parameters: The method accepts two parameters :
  • array: An array of byte values, possibly empty.
  • target: A primitive byte value which is to be checked if it is present in the array or not.
Return Value: The method returns true if target is present as an element anywhere in array, and returns false if the target is not present anywhere in the array. Exceptions: The method does not throw any exceptions. Below examples illustrate the implementation of above method: Example 1: Java
// Java code to show implementation of
// Guava's Bytes.contains() method

import com.google.common.primitives.Bytes;
import java.util.Arrays;

class GFG {

    // Driver's code
    public static void main(String[] args)
    {

        // Creating a Byte array
        byte[] arr = { 5, 4, 3, 2, 1 };

        byte target = 3;

        // Using Bytes.contains() method to search
        // for an element in the array. The method
        // returns true if element is found, else
        // returns false
        if (Bytes.contains(arr, target))
            System.out.println("Target is present"
                               + " in the array");
        else
            System.out.println("Target is not present"
                               + " in the array");
    }
}
Output: 
Target is present in the array
Example 2 : Java
// Java code to show implementation of
// Guava's Bytes.contains() method

import com.google.common.primitives.Bytes;
import java.util.Arrays;

class GFG {

    // Driver's code
    public static void main(String[] args)
    {
        // Creating a Byte array
        byte[] arr = { 2, 4, 6, 8, 10 };

        byte target = 7;

        // Using Bytes.contains() method to search
        // for an element in the array. The method
        // returns true if element is found, else
        // returns false
        if (Bytes.contains(arr, target))
            System.out.println("Target is present"
                               + " in the array");
        else
            System.out.println("Target is not present"
                               + " in the array");
    }
}
Output: 
Target is not present in the array
Reference: https://guava.dev/releases/19.0/api/docs/com/google/common/primitives/Bytes.html#contains(byte%5B%5D, %20byte)
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