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 interface import 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 interface import 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