java随机数怎样保证安全

?Java?,???????????,?????SecureRandom???????????????????,???????????,???????????

???????SecureRandom???????????:

import java.security.SecureRandom;

public class SecureRandomExample {
    public static void main(String[] args) {
        // ????SecureRandom??
        SecureRandom secureRandom = new SecureRandom();

        // ????????
        int randomInt = secureRandom.nextInt();
        System.out.println("????: " + randomInt);

        // ??????????????
        int randomIntInRange = secureRandom.nextInt(100);
        System.out.println("???????0?99??: " + randomIntInRange);

        // ???????????????
        byte[] randomBytes = new byte[16];
        secureRandom.nextBytes(randomBytes);
        System.out.println("??????: " + bytesToHex(randomBytes));
    }

    // ???????????????
    public static String bytesToHex(byte[] bytes) {
        StringBuilder sb = new StringBuilder();
        for (byte b : bytes) {
            sb.append(String.format("x", b));
        }
        return sb.toString();
    }
}

??????,???????java.security.SecureRandom?,???main????????SecureRandom??????,????nextInt()?nextBytes()????????????????,???????????????????????

???,SecureRandom???????java.util.Random,?????????????????????,???????????,????????