ERRORS grrr!

Question

hi all,
i have to use javax.comm api at my project, but i can not use it hitherto..
i use Oracle's JDeveloper and show the path of comm api to the JDEV. but i cannot use it in the code like;
import javax.comm.*;
i can use like this;
import comm.*;
but when i compile the code ERRORS came out and says;
Error(19,12): cannot access class CommPortIdentifier; class file: comm.CommPortIdentifier contains wrong class: javax.comm.CommPortIdentifier
Error(21,12): cannot access class SerialPort; class file: comm.SerialPort contains wrong class: javax.comm.SerialPort
Error(59,20): cannot access class CommPortIdentifier; class file: comm.CommPortIdentifier contains wrong class: javax.comm.CommPortIdentifier
Error(75,29): cannot access class SerialPort; class file: comm.SerialPort contains wrong class: javax.comm.SerialPort
etc....
please help meeeee :))

Answer 1

hi all,
i have to use javax.comm api at my project, but i can
not use it hitherto..
i use Oracle's JDeveloper and show the path of comm
api to the JDEV. but i cannot use it in the code like;
import javax.comm.*;
i can use like this;
import comm.*;
but when i compile the code ERRORS came out and says;
Error(19,12): cannot access class CommPortIdentifier;
class file: comm.CommPortIdentifier contains wrong
class: javax.comm.CommPortIdentifier
Error(21,12): cannot access class SerialPort; class
file: comm.SerialPort contains wrong class:
javax.comm.SerialPort
Error(59,20): cannot access class CommPortIdentifier;
class file: comm.CommPortIdentifier contains wrong
class: javax.comm.CommPortIdentifier
Error(75,29): cannot access class SerialPort; class
file: comm.SerialPort contains wrong class:
javax.comm.SerialPort
etc....
please help meeeee :))This is certainly a cause for errors:
The package you include makes the compiler believe that the package is called
comm and that the classes are called comm.CommPortIdentifier, comm.SerialPort,...
While the actual classes have been constructed to be in the package javax.comm
by the line package javax.comm;
So there is a mismatch between the import-names and the actual classes internal names.
That is why you get a problem : comm.SerialPort contains wrong class: javax.comm.SerialPort.
I do not understand why you cannot import the package as import javax.comm.* unless
your classpath is not correct
So check your classpath-settings to point to the right jar-file.
kind regards,