classloader

package com.aaa.bbb;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

public class GetProperty {
	public static final String SUN_BOOT_CLASS_PATH = "sun.boot.class.path";
	public static final String JAVA_EXT_DIRS = "java.ext.dirs";
	public static final String JAVA_CLASS_PATH = "java.class.path";
	
	public void print(String ss) {
		System.out.println("Im ok!" + ss);
	}
	
	@SuppressWarnings("unchecked")
	public static void main(String args[]) throws ClassNotFoundException, SecurityException, NoSuchMethodException, IllegalArgumentException, IllegalAccessException, InvocationTargetException, InstantiationException {
		System.out.println(GetProperty.SUN_BOOT_CLASS_PATH + " = " + System.getProperty(GetProperty.SUN_BOOT_CLASS_PATH));
		System.out.println(GetProperty.JAVA_EXT_DIRS + " = " + System.getProperty(GetProperty.JAVA_EXT_DIRS));
		System.out.println(GetProperty.JAVA_CLASS_PATH + " = " + System.getProperty(GetProperty.JAVA_CLASS_PATH));
		
		Class getp = Class.forName("com.aaa.bbb.GetProperty");
		Class[] argTypes = new Class[]{String.class};
		Method m = getp.getMethod("print", argTypes);
		m.invoke(Thread.currentThread().getContextClassLoader().loadClass("com.aaa.bbb.GetProperty").newInstance(), "aaaa");
		
	}

}