类的加载器 ClassLoader

public class TestClassLoader {
	public static void main(String[] args) throws ClassNotFoundException {
		ClassLoader classLoader1 = ClassLoader.getSystemClassLoader();// 获取系统类加载器
		System.out.println(classLoader1);// sun.misc.Launcher$AppClassLoader@18b4aac2
		ClassLoader classLoader2 = classLoader1.getParent();// 获取扩展类加载器
		System.out.println(classLoader2);// sun.misc.Launcher$ExtClassLoader@dcf3e99
		ClassLoader classLoader3 = classLoader2.getParent();// 尝试获取引导类加载器
		System.out.println(classLoader3);// null
		ClassLoader classLoader4 = String.class.getClassLoader();// 核心类库使用引导类加载器
		System.out.println(classLoader4);// null
		ClassLoader classLoader5 = com.cdf.reflection.Person.class.getClassLoader();// 自建类使用系统类加载器
		System.out.println(classLoader5);// sun.misc.Launcher$AppClassLoader@18b4aac2
	}
}