Map hashCode() Method in Java with Examples
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
