我有java程序，它使用包＆＃34; jahuwaldt＆＃34;我必须改变一个类里面，我采取源代码，我做了修改，我编译然后我添加类到packag，但我有这个错误
C:\Program Files\Java\jdk1.6.0_01\bin>javac HT_plane_FD_T.java
HT_plane_FD_T.java:389: cannot access ContourPlot
bad class file: .\ContourPlot.class
class file contains wrong class: jahuwaldt.plot.ContourPlot
Please remove or make sure it appears in the correct subdirectory of the classpath.
ContourPlot pp=new ContourPlot(a,0.0,1.0,0.0,1.0,40, false,"x","y","T=f(x,y)");
^
1 error