JDeveloper and jnlp.jar or javaws.jar

Question

Hi, I am developing an applet with the JDeveloper 12c, I am using the JSDK 1.7.
While implementing the java program I need to use FileOpenService or FileContent classes for that I need to import javax.jnlp.*
But is not included in the 1.7 JDK,
My sorce code is like this:
        try {
            FileOpenService fileOpenService = (FileOpenService) ServiceManager.lookup("javax.jnlp.FileOpenService");
            FileContents contents = fileOpenService.openFileDialog(null,null);
Do you know how can I import this classes at this environment??.
Thank you in advance.

Answer 1

what do stacktrace mean??????? Please do not hold down you '?' key.
One question mark is enough.
Here is a simple example of a stacktrace..
If you run this code..public class ShowStackTrace {
  public static void main(String[] args) {
    Object object1 = new Object();
    System.out.println( object1.getClass() );
    Object object2 = null;
    System.out.println( object2.getClass() );
}It writes this to the console..class java.lang.Object
Exception in thread "main" java.lang.NullPointerException
        at ShowStackTrace.main(ShowStackTrace.java:6)
Press any key to continue . . .The first line is program ouput.
The 2nd & 3rd lines are a stacktrace.
The stacktrace tells us exactly which line
of the program failed (line 6), and what
went wrong (NullPointerException).
Both Java applets and Java Web-Start
applications can have a console appear.
The console will show any stacktraces
that happen in the code (or it should), and
you need to find how to open the
web-start console, on your PC.
What OS and Java (version) are
you running?
And another thing. Please do not
ignore me. Twice I have asked you
to post your JNLP file, yet twice you
have not done so, and not made any
comment.
Feel free to ask questions about
anything I write that is not clear,
but be warned I will not ask again*,
for you to show us the JNLP file.
* Instead, I will just just stop repeating
myself, and stop trying to help you.