The
multiplyHigh(long x, long y) method of
Math class is used to return the most significant 64 bits from the 128-bit product of two 64-bit factors. This method takes two long values as input and a long is a 64-bit number. This method multiplies both long values and returns the most significant 64 bits from the product result which can be 128 bit long.
Syntax:
public static long multiplyHigh(long x, long y)
Parameters: This method accepts two long
x, y as parameter where x and y are argument we want to multiply.
Return Value: This method returns the most significant 64 bits long value from the 128-bit product of two 64-bit numbers
i.e. X * Y.
Note: This method was added in
JDK 9. Hence it wont run in Online IDE.
Below programs illustrate the multiplyHigh() method:
Program 1:
Output:
45267356745 * 45676556735 = 112
Program 2: Multiplying two long contains Long.MAX values.
