Until java9 for adding external jar to classpath in runtime by programmatically everybody used:
URLClassLoader sysloader = (URLClassLoader) ClassLoader.getSystemClassLoader();
Method method = URLClassLoader.class.getDeclaredMethod("addURL", new Class[]{URL.class});
method.invoke(sysloader, new Object[]{file.toURI().toURL()});
Now with java9 we have problem:
Exception in thread "main" java.lang.ClassCastException:
java.base/jdk.internal.loader.ClassLoaders$AppClassLoader
cannot be cast to java.base/java.net.URLClassLoader
URLClassLoader
doesn't work anymore in Java 9. What to do now under jdk9 for adding an external jar to the classpath in runtime programmatically?
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