Java - Double Class hashCode() Method

Double class hashCode() method: Here, we are going to learn about the hashCode() method of Double class with its syntax and example. By Preeti Jain Last updated : March 23, 2024

Double class hashCode() method

  • hashCode() method is available in Double class of java.lang package.
  • hashCode() method is used to return hashcode of the Double-object.
  • hashCode() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
  • hashCode() method does not throw an exception at the time of returning hashcode.

Syntax

public int hashCode();

Parameters

  • It does not accept any parameter.

Return Value

The return type of this method is int, it returns hash code for this object.

Example

// Java program to demonstrate the example // of int hashCode() method of Double class public class HashCodeOfDoubleClass { public static void main(String[] args) { // Variables initialization double value1 = 30.20; double value2 = 10.20; // It returns hashcode value denoted by this Double d1 object // by calling d1.hashCode() Double d1 = new Double(value1); // Display d1 result System.out.println("d1.hashCode(): " + d1.hashCode()); // It returns hashcode value denoted by this Double d2 object // by calling d2.hashCode() Double d2 = new Double(value2); // Display d2 result System.out.println("d2.hashCode(): " + d2.hashCode()); } }

Output

d1.hashCode(): 1930231808
d2.hashCode(): 641859584

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