Re: javac error when using jar file : cannot find symbol

public class DeriveKeyDemo
{
      public static void main(String[] args)
      {
         try
         {
            keyDerivator = MyWrapperData.getInstance("DES",
"MyJCEProvider");
                keyDerivator.initialize(keyGen, 1024);

            // ...
         }
      }

}

CLASSPATH is setup as below:
$ export CLASSPATH=/home/powah/jdk1.6.0_06/jre/lib/ext/MyJCASP.jar:/
home/powah/jdk1.6.0_06/jre/lib/ext/MyJCESP.jar

$ javac DeriveKeyDemo.java
         ^
DeriveKeyDemo.java:94: cannot find symbol
symbol : method getInstance(java.lang.String,java.lang.String)
location: class com.mycomp.cryptox.MyWrapperData
            keyDerivator = MyWrapperData.getInstance("DES",
"MyJCEProvider");
                                    =

DeriveKeyDemo.java:95: cannot find symbol
symbol : method initialize(javax.crypto.KeyGenerator,int)
location: class com.mycomp.cryptox.MyWrapperData
                keyDerivator.initialize(keyGen, 1024);
                            ^
2 errors