如何在 Java 中生成一个随机 BigInteger 值？
为了在Java中生成随机的BigInteger，让我们先设置一个min和max值-
BigInteger maxLimit = new BigInteger("5000000000000");
BigInteger minLimit = new BigInteger("25000000000");现在，减去min和max−
BigInteger bigInteger = maxLimit.subtract(minLimit); //声明一个 Random 对象并查找 maxLimit 的长度: Random randNum = new Random(); int len = maxLimit.bitLength();
现在，用上面创建的长度和随机对象设置一个新的B整数。
示例
import java.math.BigInteger;
import java.util.Random;
public class Demo {
public static void main(String[] args) {
BigInteger maxLimit = new BigInteger("5000000000000");
BigInteger minLimit = new BigInteger("25000000000");
BigInteger bigInteger = maxLimit.subtract(minLimit);
Random randNum = new Random();
int len = maxLimit.bitLength();
BigInteger res = new BigInteger(len, randNum);
if (res.compareTo(minLimit) < 0)
res = res.add(minLimit);
if (res.compareTo(bigInteger) >= 0)
res = res.mod(bigInteger).add(minLimit);
System.out.println("The random BigInteger = "+res);
}
}输出结果
The random BigInteger = 3874699348568