java lang noclassdeffounderror 3a org 2fspringframework 2ftest 2fcontext 2ftestcontextannotationutils

1/** This is caused when there is a class file that your code depends on 
2* and it is present at compile time but not found at runtime. 
3* Look for differences in your build time and runtime classpaths. */
4
5/** While it's possible that this is due to a classpath mismatch between 
6compile-time and run-time, it's not necessarily true.*/
7
8It is important to keep two or three different exceptions straight 
9in our head in this case:
10
11	1. "java.lang.ClassNotFoundException":
12		This exception indicates that the 
13    class was not found on the classpath. This indicates that we were 
14    trying to load the class definition, and the class did not exist on 
15    the classpath.
16
17	2. "java.lang.NoClassDefFoundError": 
18		This exception indicates that the JVM looked in its internal class 
19    definition data structure for the definition of a class and did 
20    not find it. This is different than saying that it could not 
21    be loaded from the classpath. Usually this indicates that we 
22    previously attempted to load a class from the classpath, but 
23    it failed for some reason - now we're trying to use the class
24    again (and thus need to load it, since it failed last time), 
25	but we're not even going to try to load it, because we failed 
26    loading it earlier (and reasonably suspect that we would fail again).
27    The earlier failure could be a ClassNotFoundException or an 
28    ExceptionInInitializerError (indicating a failure in the static 
29    initialization block) or any number of other problems. 
30    The point is, a NoClassDefFoundError is not necessarily a 
31    classpath problem.