How to load and use one more than .class file?

Question

I have a folder in this folder I have 4 .class file .I want load this files in my main program and call the methods .for one .class file I do like so:

File file = new File("/home/saeed/NetBeansProjects/java-test/build/classes");

URI uri = file.toURI();
URL[] urls = new URL[]{uri.toURL()};

ClassLoader classLoader = new URLClassLoader(urls);

Class clazz = classLoader.loadClass("com.test.NewClass");

And for invoke the method I do like so:

Object obj = clazz.newInstance();

System.out.println(""+obj.getClass().
        getMethod("echo",String.class).invoke(obj, "Saeed"));

Now I have one more than .class in the folder .How can I load and invoke their methods? Can anyone help me?

Answer 1

You can use PathMatcher , here is an example:

Path startDir = Paths.get("C:\\home");

String pattern = "*.class";

FileSystem fs = FileSystems.getDefault();
final PathMatcher matcher = fs.getPathMatcher("glob:" + pattern);

FileVisitor<Path> matcherVisitor = new SimpleFileVisitor<Path>() {
    @Override
    public FileVisitResult visitFile(Path file, BasicFileAttributes attribs) {
        Path name = file.getFileName();
        if (matcher.matches(name)) {
            // Found a .class file 
            System.out.print(String.format("Found matched file: '%s'.%n", file));
        }
        return FileVisitResult.CONTINUE;
    }
};