This method is used to generate a hashCode for the given map containing key and values.
Syntax:
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 in Map interfaceimport java.util.*;public class GfG {      // Driver code    public static void main(String[] args)    {          // Initializing a Map of type HashMap        Map<Integer, String> map = new HashMap<>();        map.put(1, "One");        map.put(3, "Three");        map.put(5, "Five");        map.put(7, "Seven");        map.put(9, "Ninde");        System.out.println(map);          int hash = map.hashCode();          System.out.println(hash);    }} |
Output:
{1=One, 3=Three, 5=Five, 7=Seven, 9=Ninde}
238105666
Program 2: Below is the code to show implementation of hashCode().
// Java code to show the implementation of// hashCode method in Map interfaceimport java.util.*;public class GfG {      // Driver code    public static void main(String[] args)    {          // Initializing a Map of type HashMap        Map<String, String> map = new HashMap<>();        map.put("1", "One");        map.put("3", "Three");        map.put("5", "Five");        map.put("7", "Seven");        map.put("9", "Ninde");        System.out.println(map);          int hash = map.hashCode();          System.out.println(hash);    }} |
Output:
{1=One, 3=Three, 5=Five, 7=Seven, 9=Ninde}
238105618
Reference:
Oracle Docs
