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Java Quellcode

import java.io.*;
import java.net.*;
 
/**
 * <p>Title: ClassPathController</p>
 *
 * <p>Description: Adding files to the ClassPath</p>
 *
 * $Revision: $
 * $Log: $
 */
 
public class ClassPathController {
 
    private static final Class[] parameters = new Class[] { URL.class };
 
    public static void addFile(String s) throws IOException {
        File f = new File(s);
        addFile(f);
    }//end method
 
    public static void addFile(File f) throws IOException {
        addURL(f.toURL());
    }//end method
 
    public static void addURL(URL u) throws IOException {
 
        URLClassLoader sysloader = (URLClassLoader) ClassLoader
                .getSystemClassLoader();
        Class sysclass = URLClassLoader.class;
 
        try {
            Method method = sysclass.getDeclaredMethod("addURL", parameters);
            method.setAccessible(true);
            method.invoke(sysloader, new Object[] { u });
            System.out.println("added " + u.toString() + " to Classpath");
        } catch (Throwable t) {
            t.printStackTrace();
            throw new IOException(
                    "Error, could not add URL to system classloader");
        }//end try catch
 
    }//end method
 
}//end class
 
/**
 * Usage
 */
public Application() {
        try {
            ClassPathController.addFile(new File ("nummer1.jar"));
            ClassPathController.addFile(new File ("nummer2.jar"));
    } catch (IOException e) {
        e.printStackTrace();
    }
}

Java Quellcode

ClassPathController.addFile(new File ("nummer1.jar"));