JFileChooser jf = new JFileChooser();
jf.setMultiSelectionEnabled(true);
int returnVal = jf.showOpenDialog(frame);
File[] file = jf.getSelectedFiles();

for(int i=0;i<file.length;i++)
    {   
        System.out.println("Iteration number "+i);
        Workbook workbook;
        try {
            workbook=Workbook.getWorkbook(file[i]);
            Sheet sheet=workbook.getSheet(0);
            r=sheet.getRows();
            c=sheet.getColumns();
            for(int k=0;k<c;k++)
            {
                for(int j=0;j<r;j++)
                {
                    Cell a=sheet.getCell(k,j);  
                    arr[k][j]=a.getContents();
                    System.out.println(arr[k][j]);
                }
                System.out.println("\n");
            }  




        }
        catch (BiffException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
        }
        catch (IOException e2) {
            // TODO Auto-generated catch block
            e2.printStackTrace();
                        }
}