Java Classloader default classloader

Question

请告诉我默认使用哪个JDK类将应用程序类加载到jvm中。因为它的抽象class.so不能是Classloader类，所以JDK类用于加载应用程序类？

Answer 1

From experimentation on Oracle OpenJDK 8, this is sun.misc.Lanucher$AppClassLoader which subclasses the concrete (non-abstract) URLClassLoader .

_{The links given are to the JDK6 source as per the tags in the original question. The Java 8 AppClassLoader is available here .}

Answer 2

When you read the theory then usually the first classloader is called a bootstrap class loader. The instance will differ based on implementation (HotSpot, JRockit, IBM and based on version). There is more information on this at the Java API Specification .