JBuild 8.0 中的applet程序中，为什么在运行时总是显示：class not found

[datawu]

编译时显示：class not found:class java.lang.object
cannot access directory java at line 1
cannot access lang at line 3
cannot access awt\event at line 4
cannot access applet at line 5
这是一个菜鸟问题！请各位帮参考一下。
有高分赠送！