I wanna output multiple answer to the text file i create in the root location.

but if i put

try{
String uri = "file:///root1/myfile2.txt;append=true";
OutputConnection connection = (OutputConnection)
Connector.open(uri, Connector.WRITE );
OutputStream out = connection.openOutputStream();
printStream output = new PrintStream( out );
output.print( "Answer 1 is:\n\n" + list.getString(x)); out.close();
connection.close();
}

the append=true will cause error:java.io.IOException:

if i remove the append=true , i can save the data....but only one data is save to the text file each time.

One of my initial thoughts is...
Why are you writing to a text file?

"file:///root1/myfile2.txt;append=true"

The whole string is considered to be a filename, and as such it is not a valid filename.

Check the documentation, at some point you can tell the method you use to append. I usually use a filewriter and you can set an append flag when creating the file object. Don't know with connector and outputstream but should be simular.

http://java.sun.com/j2se/1.4.2/docs/...ileWriter.html
Method: FileWriter(String fileName, boolean append)

if the link doesn't work then google "filewriter java"