Java Class Loader addFileToSystemClassLoader(String s)

Description

add File To System Class Loader

License

Open Source License

Declaration

public static void addFileToSystemClassLoader(String s) throws IOException 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.io.File;
import java.io.IOException;
import java.lang.reflect.Method;
import java.net.URL;
import java.net.URLClassLoader;

public class Main {
    private static final Class[] parameters = new Class[] { URL.class };

    public static void addFileToSystemClassLoader(String s) throws IOException {
        File f = new File(s);
        addFileToSystemClassLoader(f);//from ww  w.j a  v a  2 s .  co  m
    }

    public static void addFileToSystemClassLoader(File f) throws IOException {
        addURLToSystemClassLoader(f.toURI().toURL());
    }

    public static void addURLToSystemClassLoader(URL u) throws IOException {
        URLClassLoader sysloader = (URLClassLoader) ClassLoader.getSystemClassLoader();
        Class<URLClassLoader> sysclass = URLClassLoader.class;
        try {
            Method method = sysclass.getDeclaredMethod("addURL", parameters);
            method.setAccessible(true);
            method.invoke(sysloader, new Object[] { u });
        } catch (Throwable t) {
            t.printStackTrace();
            throw new IOException("Error, could not add URL to system classloader");
        }
    }
}

Related

1. addDirectoryToClassLoader(ClassLoader loader, File directory)
2. createClassloader(File libDir, ClassLoader cl)
3. createClassLoader(File root)
4. createClassLoader(final String[] cpEntries)
5. createClassLoader(String fileName)