Java – jar in classpath

Is there a way to programmatically get a complete list of all jars in the classpath?

I need this because we have behavioral differences between the two platforms One is managed by us, but the other is not. I need to know if it exists or not the same jar

Solution

This is a way to print out the current project classpath:

ClassLoader cl = ClassLoader.getSystemClassLoader();
java.net.URL[] urls = ((java.net.urlclassloader)cl).getURLs();
for (java.net.URL url: urls) {
    System.out.println(url.getFile());
}

If you need to determine which jar a class is loaded from:

Class klass = ClassInTrouble.class;
CodeSource source = klass.getProtectionDomain().getCodeSource();
System.out.println(source == null ? klass : source.getLocation());

You can also get a list of all classes loaded in the JVM if it is useful