Java Guava | Longs.contains() method with Examples

Last Updated : 29 Jan, 2019

The Longs.contains() method of Guava’s Longs Class is used to check if a value i.e. target is present in the array or not. This target value and the array are taken as parameters to this method. And this method returns a boolean value that states whether the target value is

Syntax:

public static boolean contains(long[] array, 
                               long target)

Parameters: This method accepts two parameters:

array: which is the array of values in which the target value is to be searched
target: which is the long value to be checked for presence.

Return Value: The method returns True if for some value of i, the value present at i_th index is equal to the target, else returns False.

Exceptions: The method doesn’t throw any exception.

Example 1:

// Java code to show implementation of 
// Guava's Longs.contains() method 
  
import com.google.common.primitives.Longs; 
import java.util.Arrays; 
  
class GFG { 
  
    // Driver's code 
    public static void main(String[] args) 
    { 
        // Creating a long array 
        long[] arr = { 5L, 4L, 3L, 2L, 1L }; 
  
        long target = 3L; 
  
        // Using Longs.contains() method to search 
        // for an element in the array. The method 
        // returns true if element is found, else 
        // returns false 
        if (Longs.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 code to show implementation of 
// Guava's Longs.contains() method 
  
import com.google.common.primitives.Longs; 
import java.util.Arrays; 
  
class GFG { 
    // Driver's code 
    public static void main(String[] args) 
    { 
        // Creating a long array 
        long[] arr = { 2L, 4L, 6L, 8L, 10L }; 
  
        long target = 7L; 
  
        // Using Longs.contains() method to search 
        // for an element in the array. The method 
        // returns true if element is found, else 
        // returns false 
        if (Longs.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://google.github.io/guava/releases/21.0/api/docs/com/google/common/primitives/Longs.html#contains-long:A-long-

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