How do you print the java classpath?

Keywords:
java servlet "print classpath"

Problem:
This requirement came in trying to diagnose the previous post. It'd be quite useful in a any enterprise/web application to be able to see the classpath in use (perhaps via an administration page).

Solution:
This is based on post on Java Tips (very useful site), but with the difference that your web application will have a different classloader to the system one. You'll need the classloader being used by a class within the web application (such as the one responsible for producing your admin-output).

 public String getClasspathString() {
     StringBuffer classpath = new StringBuffer();
     ClassLoader applicationClassLoader = this.getClass().getClassLoader();
     if (applicationClassLoader == null) {
         applicationClassLoader = ClassLoader.getSystemClassLoader();
     }
     URL[] urls = ((URLClassLoader)applicationClassLoader).getURLs();
      for(int i=0; i < urls.length; i++) {
          classpath.append(urls[i].getFile()).append("\r\n");
      }    
     
      return classpath.toString();
  }