Java 从类加载器加载一个类；如果找不到，将使用指定的上下文类的类加载器。

// 来自 时 代 J a v a 公 众 号

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//Licensed under the Apache License, Version 2.0 (the "License");

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//package com.nowjava;

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public class Main {

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

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        String className = "nowjava.com";

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        Class context = String.class;

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        boolean checkParent = true;

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        System.out.println(loadClass(className, context, checkParent));

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    }

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    /**

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     * Loads a class from the classloader; 

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     * If not found, the classloader of the {@code context} class specified will be used.

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     * If the flag {@code checkParent} is true, the classloader's parent is included in 

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     * the lookup.

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     */

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    static Class<?> loadClass(String className, Class<?> context,

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            boolean checkParent) {

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        Class<?> clazz = null;

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        try {

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            clazz = Thread.currentThread().getContextClassLoader()

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                    .loadClass(className);/*n o w j a v a . c o m - 时  代  Java*/

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        } catch (ClassNotFoundException e) {

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            if (context != null) {

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                ClassLoader loader = context.getClassLoader();

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                while (loader != null) {

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                    try {

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                        clazz = loader.loadClass(className);

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                        return clazz;

/**代码未完, 请加载全部代码(NowJava.com).**/