精确计算两个double值之间的差

import java.math.BigDecimal;

public class DoubleDifference {
    public static void main(String[] args) {
        double value1 = 3.14159;
        double value2 = 2.71828;

        BigDecimal bd1 = new BigDecimal(Double.toString(value1));
        BigDecimal bd2 = new BigDecimal(Double.toString(value2));

        BigDecimal difference = bd1.subtract(bd2);

        double result = difference.doubleValue();

        System.out.println("精确差值为: " + result);
    }
}