Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.net.JarURLConnection;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.jar.Attributes;

public class Main extends URLClassLoader {
    private URL url;

    public Main(URL url) {
        super(new URL[] { url });
        this.url = url;
    }

    public String getMainClassName() throws IOException {
        URL u = new URL("jar", "", url + "!/");
        JarURLConnection uc = (JarURLConnection) u.openConnection();
        Attributes attr = uc.getMainAttributes();
        return attr != null ? attr.getValue(Attributes.Name.MAIN_CLASS) : null;
    }

    public void invokeClass(String name, String[] args)
            throws ClassNotFoundException, NoSuchMethodException, InvocationTargetException {
        Class c = loadClass(name);
        Method m = c.getMethod("main", new Class[] { args.getClass() });
        m.setAccessible(true);
        int mods = m.getModifiers();
        if (m.getReturnType() != void.class || !Modifier.isStatic(mods) || !Modifier.isPublic(mods)) {
            throw new NoSuchMethodException("main");
        }
        try {
            m.invoke(null, new Object[] { args });
        } catch (IllegalAccessException e) {

        }
    }

}