Java Guava | Doubles.hashCode() method with Examples

Doubles.hashCode() is a method of Doubles Class in Guava Library which is used to return a hash code for a double value. The hashCode is an unique integer value that is calculated by the compiler for an object. It remain the same if the object value does not changes.

Syntax:

public static int hashCode(double value)

Parameter: This method takes a mandatory parameter value which is a double value for which the hashCode is to be found.

Return Value: This method returns an integer value which is the hash code for the specified value.

Below programs illustrate the use of the above method:

Example 1:

// Java code to show implementation of
// Guava's Doubles.hashCode() method

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

class GFG {
    // Driver's code
    public static void main(String[] args)
    {
        // Using Doubles.hashCode() method to
        // get the hash code for value
        System.out.println("HashCode value of 10.12: "
                           + Doubles.hashCode(10.12));
    }
}

Output:

HashCode value of 10.12: -470599859

Example 2:

// Java code to show implementation of
// Guava's Doubles.hashCode() method

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

class GFG {
    // Driver's code
    public static void main(String[] args)
    {
        // Using Doubles.hashCode() method to
        // get the hash code for value
        System.out.println("HashCode value of 20.45: "
                           + Doubles.hashCode(20.45));
    }
}

Output:

HashCode value of 20.45: 1929854976

Reference: https://google.github.io/guava/releases/19.0/api/docs/com/google/common/primitives/Doubles.html#hashCode(double)