Java classloader

Question

I need to get method names of a class from a java file in a directory.

 File file=new File("C:/class/"); try { // Convert File to a URL URL url = file.toURL(); // file:/c:/class/ URL[] urls = new URL[]{url}; // Create a new class loader with the directory URLClassLoader loader = new URLClassLoader(urls); // Load in the class; Class.childclass should be located in // the directory file:/c:/class/ Class cls = loader.loadClass("Arithmatic.java"); Method[] methods=cls.getMethods(); for(Method method:methods){ System.out.println("Method name:"+method.getName()); } } catch (MalformedURLException e) { System.out.println("Exception"); } catch (ClassNotFoundException e) { System.out.println("Class not found exception"); }

I am getting ClassNotFoundException.

Is this is the correct way of doing?

Can any body suggest the solution please...

Bozho · Accepted Answer · 2010-03-09 08:51:58Z

You can't load a .java file as class. You should load a .class file (which means it should be compiled first)

loader.loadClass("Arithmatic", true);

In case you don't have the class in a compiled form, you can compile it at runtime using JavaCompiler

BorisOkunskiy · Accepted Answer · 2010-03-09 08:39:45Z

2

Try

Class.forName("Arithmatic", true, loader)

instead of

loader.loadClass("Arithmatic.java")

answered Mar 9, 2010 at 8:39

BorisOkunskiy

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