我是个新手
运行一个JAVA程序出现如下情况:
java Installer v1.78
copyright (c) IBM 1997--2001
java.lang.reflect.InvocationTarfetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Native MethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25
at java.lang.reflect.Method.invoke(Method.java:324)
at install.main(install.java:146
Causedby:java.lang.NoClassDefFoundError
at java.lang.Class.forName0(NativeMethod)
at java.langClass.forName(Class.java:130)
at java.awt.window.init(window.java:223)
at java.awt.window.<init>(window.java:267)
at java.awt.Frame.<init>(Frame.java:39
........
这段话是什么意思?