Double hashCode() method in Java with examples Last Updated : 12 Oct, 2018 Comments Improve Suggest changes Like Article Like Report 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 // 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 // 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 Comment More infoAdvertise with us Next Article Double hashCode() method in Java with examples S ShivamKD Follow Improve Article Tags : Java Java - util package Java-Functions Java-Double Practice Tags : Java Similar Reads Byte hashCode() method in Java with examples The hashCode() method of Byte class is a built in method in Java which is used to return the hash code of the ByteObject. Note: The hashCode() returns the same value as intValue(). Syntax ByteObject.hashCode() Return Value: It return an int value which represents the hashcode of the specified Byte o 2 min read Date hashCode() method in Java with Examples The hashCode() method of Java Date class returns a value which is a hash code for this object. 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