/**

* 内部分享的一些知识点

*public Launcher()

* {

* ExtClassLoader localExtClassLoader;

* try

* { //（1）首先创建了ExtClassLoader

* localExtClassLoader = ExtClassLoader.getExtClassLoader();

* }

* catch (IOException localIOException1)

* {

* throw new InternalError("Could not create extension class loader");

* }

* try

* { //（2）然后以ExtClassloader作为父加载器创建了AppClassLoader

* this.loader = AppClassLoader.getAppClassLoader(localExtClassLoader);

* }

* catch (IOException localIOException2)

* {

* throw new InternalError("Could not create application class loader");

* } //（3）这个是个特殊的加载器后面会讲到，这里只需要知道默认下线程上下文加载器为appclassloader

* Thread.currentThread().setContextClassLoader(this.loader);

* }

*/

package com.share;