Skip to content
Related Articles

Related Articles

TreeSet hashCode() method in Java with Example
  • Last Updated : 27 Dec, 2018
GeeksforGeeks - Summer Carnival Banner

The hashCode() method of TreeSet in Java is used to get the hashCode value for this instance of the TreeSet. It returns an integer value which is the hashCode value for this instance of the TreeSet.

Syntax:

public int hashCode()

Parameters: This function has no parameters.

Returns: The method returns an integer value which is the hashCode value for this instance of the TreeSet.

Below examples illustrates the TreeSet.hashCode() method:



Example 1:




// Java code to demonstrate the working of
// hashCode() method in TreeSet
  
import java.util.*;
  
public class GFG {
    public static void main(String[] args)
    {
        // creating an TreeSet
        TreeSet<Integer> LHS
            = new TreeSet<Integer>();
  
        // using add() to initialize values
        // [1, 2, 3, 4]
        LHS.add(1);
        LHS.add(2);
        LHS.add(3);
        LHS.add(4);
  
        // print TreeSet
        System.out.println("TreeSet: "
                           + LHS);
  
        // Get the hashCode value
        // using hashCode() value
        System.out.println("HashCode value: "
                           + LHS.hashCode());
    }
}
Output:
TreeSet: [1, 2, 3, 4]
HashCode value: 10

Example 2:




// Java code to demonstrate the working of
// hashCode() method in TreeSet
  
import java.util.*;
  
public class GFG {
    public static void main(String[] args)
    {
        // creating an TreeSet
        TreeSet<String> LHS
            = new TreeSet<String>();
  
        // using add() to initialize values
        // [Geeks, For, ForGeeks, GeeksForGeeks]
        LHS.add("Geeks");
        LHS.add("For");
        LHS.add("ForGeeks");
        LHS.add("GeeksForGeeks");
  
        // print TreeSet
        System.out.println("TreeSet: "
                           + LHS);
  
        // Get the hashCode value
        // using hashCode() value
        System.out.println("HashCode value: "
                           + LHS.hashCode());
    }
}
Output:
TreeSet: [For, ForGeeks, Geeks, GeeksForGeeks]
HashCode value: -482506029

Attention reader! Don’t stop learning now. Get hold of all the important Java Foundation and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready. To complete your preparation from learning a language to DS Algo and many more,  please refer Complete Interview Preparation Course.

My Personal Notes arrow_drop_up
Recommended Articles
Page :