怎么用java计算出2的64次方

Assuming that you would like a detailed answer to this question:

Java has a built-in class for handling big numbers, called BigInteger. This class has a method called pow() which calculates the power of a number.

Therefore, to calculate 2 to the 64th power using Java, you would use the following code:

import java.math.BigInteger;

public class TwoToThe64th {

public static void main(String[] args) {

BigInteger two = new BigInteger("2");

System.out.println(two.pow(64));

}

}

This code would output the following:

18446744073709551616