I am trying to write UDF using JAVA:

import COM.ibm.db2.app.*;
import COM.ibm.db2.jdbc.app.*;
import java.sql.*;
public class MyUdf extends UDF
public void myudf (String input, String output) throws SQLException,
/************************************************** **************
--> some dummy udf to output the input string
************************************************** **************/
String myString = input;
set (2, myString); // setting the output of the UDF
} // end method

If I compile this, I am getting the error :

package COM.ibm.db2.app not found
package COM.ibm.db2.jdbc.app not found

I am using DB2 7.2 on AIX 5.2, and JDK1.1

My class path has been set properly.

What can be the problem