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List hashCode() Method in Java with Examples

  • Last Updated : 02 Jan, 2019

This method is used to generate the hashCode for the given list.

Syntax:

int hashCode()

Parameters: This function has no parameter.

Returns: This function returns the hashCode value for the given list.

Below programs show the implementation of this method.



Program 1:




// Java code to show the implementation of
// hashCode method in list interface
import java.util.*;
public class GfG {
  
    // Driver code
    public static void main(String[] args)
    {
  
        // Initializing a list of type Linkedlist
        List<Integer> l = new LinkedList<>();
        l.add(10);
        l.add(15);
        l.add(20);
        System.out.println(l);
  
        int hash = l.hashCode();
  
        System.out.println(hash);
    }
}
Output:
[10, 15, 20]
39886

Program 2: Below is the code to show implementation of list.hashCode() using Linkedlist.




// Java code to show the implementation of
// hashCode method in list interface
import java.util.*;
public class GfG {
  
    // Driver code
    public static void main(String[] args)
    {
  
        // Initializing a list of type Linkedlist
        List<String> l = new LinkedList<>();
        l.add("10");
        l.add("15");
        l.add("20");
        System.out.println(l);
  
        int hash = l.hashCode();
  
        System.out.println(hash);
    }
}
Output:
[10, 15, 20]
1586008

Reference:
Oracle Docs

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