Properties hashCode() method in Java with Examples

The hashCode() method of Properties class is used to generate a hashCode for the given Properties containing key and values.

Syntax:

public int hashCode()

Parameters: This method has no argument.

Returns: This method returns the hashCode value for the given map.

Below programs show the implementation of int hashCode() method.

Program 1:

// Java code to show the implementation of
// hashCode method

import java.util.*;
public class GfG {

    // Main method
    public static void main(String[] args)
    {

        // Create a properties and add some values
        Properties properties = new Properties();
        properties.put("Pen", 10);
        properties.put("Book", 500);
        properties.put("Clothes", 400);
        properties.put("Mobile", 5000);

        // Print Properties details
        System.out.println("Properties: "
                           + properties.toString());

        // Getting the hashCode value
        System.out.println("HashCode: "
                           + properties.hashCode());
    }
}

Output:

Properties: {Book=500, Mobile=5000, Pen=10, Clothes=400}
HashCode: 548388082

Program 2:

// Java program to demonstrate
// hashCode() method.

import java.util.*;

public class GFG {

    // Main method
    public static void main(String[] args)
    {

        // Create a properties and add some values
        Properties properties = new Properties();

        properties.put(1, "100RS");
        properties.put(2, "500RS");
        properties.put(3, "1000RS");

        // Print Properties details
        System.out.println("Current Properties: "
                           + properties.toString());

        // Getting the hashCode value
        System.out.println("HashCode: "
                           + properties.hashCode());
    }
}

Output:

Current Properties: {3=1000RS, 2=500RS, 1=100RS}
HashCode: 1545792714

References: https://docs.oracle.com/javase/9/docs/api/java/util/Properties.html#hashCode–