什么是在Java中选择随机种子的跨平台方式？

long seed = System.currentTimeMillis();
Random random = new Random(seed);

String deviceInfo = System.getProperty("os.name") + System.getProperty("os.version") + System.getProperty("os.arch") + System.getProperty("user.name");
int seed = deviceInfo.hashCode();
Random random = new Random(seed);

SecureRandom secureRandom = new SecureRandom();
byte[] seedBytes = secureRandom.generateSeed(16);
secureRandom.setSeed(seedBytes);