public static void main(String[] args) {
URL[] urLs = Launcher.getBootstrapClassPath().getURLs();
System.out.println("启动类加载器加载的jar:");
for (URL urL : urLs) {
System.out.println("==> " + urL.toExternalForm());
}
printClassLoader("扩展类加载器和其加载的jar:", ClassLoaderJarPrint.class.getClassLoader().getParent());
printClassLoader("应用类加载器和其加载的jar:", ClassLoaderJarPrint.class.getClassLoader());
}
此处省略 ClassLoaderJarPrint#printClassLoader 的方法,我们通过断点的形式查看