Java Guava | Chars.contains() method with Examples

The contains() method of Chars Class in Guava library is used to check if a specified value is present in the specified array of char values. The char value to be searched and the char array in which it is to be searched, are both taken as a parameter.

Syntax:

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

Parameters: This method accepts two mandatory parameters:

• array: which is an array of char values in which the target value is to be searched.
• target: which is the char value to be searched for presence in the array.

Return Value: This method returns a boolean value stating whether the target char value is present in the specified char array. It returns True if the target value is present in the array. Else it returns False.

Below programs illustrate the use of contains() method:

Example 1:

// Java code to show implementation of
// Guava's Chars.contains() method

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

class GFG {

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

        // Creating a character array
        char[] arr = { 'g', 'e', 'e', 'k', 's' };

        char target = 'k';

        // Using Chars.contains() method to search
        // for an element in the array. The method
        // returns true if element is found, else
        // returns false
        if (Chars.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 Chars.contains() method

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

class GFG {

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

        // Creating a character array
        char[] arr = { 'g', 'e', 'e', 'k', 's' };

        char target = 'a';

        // Using Chars.contains() method to search
        // for an element in the array. The method
        // returns true if element is found, else
        // returns false
        if (Chars.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/18.0/api/docs/com/google/common/primitives/Chars.html#contains(char[], %20char)