The hashCode() method of Double class is a built-in method use to return the hashcode value of this Double object.
Syntax:
DoubleObject.hashCode()
Parameters: It takes no parameters.
Return Type: It returns an int value. The value returned is (int)(v^(v>>>32)) where v is a long variable equal to Double.doubleToLongBits(this.doubleValue()).
Below is the implementation of hashCode() method:
Example 1:
// Java code to demonstrate// Double hashCode() Method  class GFG {    public static void main(String[] args)    {          double d = 118.698;          // creating Double object.        Double value = new Double(d);          // hashCode() method Double class        int output = value.hashCode();          // printing the output        System.out.println("Hashcode Value of "                           + value + " : "                           + output);    }} |
Output:
Hashcode Value of 118.698 : 1215072837
Example 2:
// Java code to demonstrate// Double hashCode() Method  class GFG {    public static void main(String[] args)    {          int i = -30;          // creating Double object.        Double value = new Double(i);          // hashCode() method Double class        int output = value.hashCode();          // printing the output        System.out.println("Hashcode Value of "                           + value + " : "                           + output);    }} |
Output:
Hashcode Value of -30.0 : -1069678592
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