[File]Reading a file

I am puzzled as the prog does not fin the file ; this is the code :

JFileChooser chooser = new
JFileChooser("/media/USER_data/dmoyne_data/GENEALOGIE_data/GenJ_data/GenJ_data/actes/Menotey/tmp");
int FileSelectorIntValue = chooser.showOpenDialog(null);
if(FileSelectorIntValue == JFileChooser.APPROVE_OPTION) {
        String FileNameStringValue=chooser.getSelectedFile().getName();
        println("You chose to open this file: "+FileNameStringValue);
        BufferedReader entree=new BufferedReader(new
FileReader(FileNameStringValue));
        String ligne;
        do {
                ligne=entree.readLine();
                if (ligne != null) {
                        println("ligne :"+ligne);
                }
        } while (ligne != null) ;
        entree.close();
        println("fin lecture fichier");
        }
else {
        println("You have not selected a file : abortion");
        }

Once I have selected my text file with the File Selector I get this error
message :

java.lang.RuntimeException: report failed
        at genj.report.Report.start(Report.java:940)
        at genj.report.ReportView$ActionStart.execute(ReportView.java:450)
        at genj.util.swing.Action2$CallAsyncExecute.run(Action2.java:487)
        at java.lang.Thread.run(Thread.java:595)
Caused by: java.io.FileNotFoundException: batch.txt (No such file or
directory)
        at java.io.FileInputStream.open(Native Method)
        at java.io.FileInputStream.<init>(FileInputStream.java:106)
        at java.io.FileInputStream.<init>(FileInputStream.java:66)
        at java.io.FileReader.<init>(FileReader.java:41)
        at ReportPluginBatchEntry.start(ReportPluginBatchEntry.java:80)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at genj.report.Report.start(Report.java:931)
        ... 3 more

Basically that my "batch.txt" file as selected with the File Selector cannot
be found.

Is this a path problem because the FileNameStringValue as returned by the
filer is simply the file name ; if I have to concatenate the path how do I
get it from the File selector to do :
FileNameStringValue=FilePathStringValue+FileNameStringValue;

Regards.