关于java反射中的Class异常？
下面是java的简单工厂方法我用了java的反射机制。可它老是出现异常啊，上网查了下也没找到解决方法，那位能告诉我是什么原因啊，小弟在此谢了。
public interface Animal {

public void run();

}
public class Tiger implements Animal{

public void Tiger()
{

}

public void run()
{
System.out.println("老虎会跑");
}

public void eat()
{
System.out.println("老虎会吃");
 
}

}

public class SampleFactory 
{
public static Animal createAnimal(String className) throws ClassNotFoundException, InstantiationException, IllegalAccessException
{
Class c=Class.forName(className);
Animal animal=(Animal)c.newInstance();
return animal;
}

}


public class Client {


public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException {

Animal animal=SampleFactory.createAnimal("Tiger");
animal.run();

}

}

异常：Exception in thread "main" java.lang.ClassNotFoundException: Tiger
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)


------解决方案--------------------
classpath设置的问题吧？因为你的类没有在classpath里
试试通过用URLClassLoader加载类，获得Class的实例

我没有尝试，也是个初学者，不过lz可以试试我说的方法
------解决方案--------------------
补充下上面回答：

URL url = new URL("file:\\" + path + "\\");
URLClassLoader ucl = new URLClassLoader(new URL[]{url});
Class c = ucl.loadClass(classname);