URLClassLoader in Java

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import java.io.File;
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import java.net.URL;
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import java.net.URLClassLoader;
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public class Main {
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  public static void main(String[] argv) throws Exception {
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    File file = new File("c:\\class\\");
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    URL url = file.toURI().toURL();
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    URL[] urls = new URL[] { url };
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    ClassLoader loader = new URLClassLoader(urls);
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    Class cls = loader.loadClass("user.informatin.Class");
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  }
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}

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import java.net.URL;
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import java.net.URLClassLoader;
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public class Main {
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  public static void main(String[] args) {
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    ClassLoader sysClassLoader = ClassLoader.getSystemClassLoader();
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    URL[] urls = ((URLClassLoader) sysClassLoader).getURLs();
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    for (int i = 0; i < urls.length; i++) {
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      System.out.println(urls[i].getFile());
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    }
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  }
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}