NoClassDefFoundError.java
/**
* Thrown if the Java Virtual Machine or a <code>ClassLoader</code> instance
* tries to load in the definition of a class (as part of a normal method call
* or as part of creating a new instance using the <code>new</code> expression)
* and no definition of the class could be found.
* <p>
* The searched-for class definition existed when the currently
* executing class was compiled, but the definition can no longer be
* found.
*
* @author unascribed
* @version 1.23, 11/17/05
* @since JDK1.0
*/
只能通过以上这个提示信息,看看自己哪个方便违反了这些说明。