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

From:

powah <wong_powah@yahoo.ca>

Newsgroups:

comp.lang.java.programmer

Date:

Thu, 19 Mar 2009 05:06:49 -0700 (PDT)

Message-ID:

<07fd95b2-cebf-4789-bca6-88f4b822bc51@q11g2000vbn.googlegroups.com>

On Mar 18, 3:53 pm, lord.zol...@gmail.com wrote:

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

Where did you declare keyDerivator and keyGen?

They are declared as follows:
//////////////////////////////
// DeriveKeyDemo.java
//////////////////////////////
import java.io.*;
import java.util.*;
import java.security.*;
import java.security.cert.*;
import javax.crypto.*;
import javax.crypto.spec.*;
import javax.crypto.interfaces.*;

import com.mycomp.cryptox.*; // Load MyJCEProvider classes
import com.mycomp.crypto.*; // Load MyJCAProvider classes

public class DeriveKeyDemo
{
      public static void main(String[] args)
      {
         KeyGenerator keyGen = null;
         Key desKey = null;
         try
         {
            keyGen = KeyGenerator.getInstance("DES");
            desKey = keyGen.generateKey();

            // ...
         }
         catch (Exception e)
         {
            System.out.println("Exception during Key Generation - " +
e.getMessage());
            System.exit(1);
         }

         MyWrapperData keyDerivator = null;
         try
         {
            keyDerivator = MyWrapperData.getInstance("DES",
"MyJCEProvider");
        keyDerivator.initialize(keyGen, 1024);

            // ...
         }
         catch (Exception e)
         {
            System.out.println("Exception during Key Derivation - " +
e.getMessage());
            System.exit(1);
         }
      }
}