import java.net.URL;

import sun.misc.Launcher;

/**

* 演示

* appClassLoader

* extClassloader

* bootstrapLoader

* 所加载的文件

* @author JoyoungZhang@gmail.com

*

*/

public class ClassLoaderTest {

public static void main(String[] args) throws Exception {

ClassLoader appClassLoader = ClassLoader.getSystemClassLoader();

ClassLoader extClassloader = appClassLoader.getParent();

ClassLoader bootstrapLoader = extClassloader.getParent();

System.out.println("the bootstrapLoader : " + bootstrapLoader);

System.out.println("the extClassloader : " + extClassloader);

System.out.println("the appClassLoader : " + appClassLoader);

System.out.println();

System.out.println("bootstrapLoader加载以下文件：");

URL[] urls = Launcher.getBootstrapClassPath().getURLs();

for (int i = 0; i < urls.length; i++) {

System.out.println(urls[i]);

}

System.out.println();

System.out.println("extClassloader加载以下文件：");

System.out.println(System.getProperty("java.ext.dirs"));

System.out.println();

System.out.println("appClassLoader加载以下文件：");

System.out.println(System.getProperty("java.class.path"));

}

}