How to get classpath from classloader?

SeeClassPath.java

import java.net.URL;
import java.net.URLClassLoader;

public class SeeClassPath {

	public static void main(String[] args) {
		getClasspathFromClassloader();
	}

	static void getClasspathFromClassloader() {
		ClassLoader cl = ClassLoader.getSystemClassLoader();
		URL[] urls = ((URLClassLoader) cl).getURLs();
		for (URL url : urls) {
			System.out.println(url.getFile());
		}
	}
}

Works on java8. However, it will not work on java9+, as getSystemClassLoader is no longer instanceof URLClassLoader.
Instead, you can get the private member ucp (type URLClassPath) the SystemClassLoader and call getURLs on it.