Java RNG -如何从操作系统打印出正在使用的安全随机文件？

import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;

public class SecureRandomFilePrinter {
    public static void main(String[] args) {
        try {
            SecureRandom secureRandom = SecureRandom.getInstanceStrong();
            System.out.println("Using secure random algorithm: " + secureRandom.getAlgorithm());

            // 尝试获取底层随机源，但这并不总是可行的
            String source = System.getProperty("java.security.egd");
            if (source != null && source.equals("file:/dev/random")) {
                System.out.println("Using /dev/random as the source.");
            } else if (source != null && source.equals("file:/dev/./urandom")) {
                System.out.println("Using /dev/urandom as the source.");
            } else {
                System.out.println("Using an unknown or default source.");
            }
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
    }
}