Java ClassPath Add addToClasspath(File file)

Description

Adds the specified file to the classpath dynamically

License

Open Source License

Parameter

Parameter	Description
file	- The file to add to the classpath

Return

True if the file was added, false otherwise.

Declaration

public static boolean addToClasspath(File file) 

Method Source Code

//package com.java2s;
/**/*from  w ww  .j  ava  2s  . com*/
 * This class is the core Single Player Commands class. It handles all input and controls all
 * output
 * 
 * @author simo_415 Copyright (C) 2010-2012 simo_415 - (http://bit.ly/spcmod)
 * 
 *         This file is part of Single Player Commands.
 * 
 *         Single Player Commands is free software: you can redistribute it and/or modify it under
 *         the terms of the GNU Lesser General Public License as published by the Free Software
 *         Foundation, either version 3 of the License, or (at your option) any later version.
 * 
 *         Single Player Commands is distributed in the hope that it will be useful, but WITHOUT ANY
 *         WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 *         PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 * 
 *         You should have received a copy of the GNU Lesser General Public License along with
 *         Single Player Commands. If not, see <http://www.gnu.org/licenses/>.
 */

import java.io.File;

import java.lang.reflect.*;
import java.net.URL;
import java.net.URLClassLoader;

public class Main {
    public static boolean DEBUG = false;

    /**
     * Adds the specified file to the classpath dynamically
     * 
     * @param file - The file to add to the classpath
     * @return True if the file was added, false otherwise.
     */
    public static boolean addToClasspath(File file) {
        if (!file.exists()) {
            return false;
        }
        URLClassLoader sysloader = (URLClassLoader) ClassLoader.getSystemClassLoader();
        Class<URLClassLoader> sysclass = URLClassLoader.class;
        try {
            Method method = sysclass.getDeclaredMethod("addURL", new Class[] { URL.class });
            method.setAccessible(true);
            method.invoke(sysloader, new Object[] { file.toURI().toURL() });
        } catch (Throwable t) {
            t.printStackTrace();
            return false;
        }
        return true;
    }

    /**
     * Prints the given stacktrace
     * 
     * @param throwable The exception to print
     */
    public static void printStackTrace(Throwable throwable) {
        if (DEBUG) {
            throwable.printStackTrace();
        }
    }
}

Related

1. addDirToClasspath(File directory)
2. addDirToClasspath(File directory)
3. addPathToClassPath(String s)
4. addToClasspath(File f)
5. addToClassPath(File file)
6. addToClassPath(String s)
7. addToClassPath(Vector cpV, String dir)