Output to appear in ascending order

Question

Could someone please help me to get the contents of my output file in ascending order.
I am reading a file mnf.xml kept inside my jar, the contents of it are
<assets>
</assets>I am writing the contents of the file mnf.xml to an output file, and am also adding the pdf filenames found in the directory.
The contents of the output file after running the program are
<assets>
<pdf_files name="assets/123_001_ch_03.pdf"/>
<pdf_files name="assets/123_001_ch_02.pdf"/>
<pdf_files name="assets/123_001_ch_01.pdf"/>
</assets>
But I need my output to be in the following order
<assets>
<pdf_files name="assets/123_001_ch_01.pdf"/>
<pdf_files name="assets/123_001_ch_02.pdf"/>
<pdf_files name="assets/123_001_ch_03.pdf"/>
</assets>
My code is
void fileMNF(File RootDir, String jTextField1Text)
     String filename=jTextField1Text.substring(0,jTextField1Text.lastIndexOf("."))+"_mnf.xml";
     String Assetsdir=RootDir+"\\"+"assets";
     File files=new File(Assetsdir);     
     String[] lists=files.list();
     try
          int val;
          char ch;
          InputStream is=getClass().getResourceAsStream("/Inputs/mnf.xml");
          File dstfile=File.createTempFile("mnf", ".xml");
          dstfile.deleteOnExit();
          FileOutputStream fos = new FileOutputStream(dstfile);
          int b;
          while((b = is.read()) != -1)
               fos.write(b);
          fos.close();
          File inputfile=new File(dstfile.getAbsolutePath());
          File outputfile=new File(filename);
          BufferedReader in = new BufferedReader(new FileReader(inputfile));
          BufferedWriter out = new BufferedWriter(new FileWriter(outputfile));
          String line;
          while ((line=in.readLine()) != null)
               if(line.startsWith("<assets>"))
                    for(int i=0;i<lists.length;i++)
                         if(lists.endsWith(".pdf"))
                              line = PDFLineInsert(line,lists[i]);
               out.write(line);
               out.newLine();
               out.flush();
          in.close();
          out.close();
     catch(Exception e)
          System.out.println(e.getMessage());
private String PDFLineInsert(String line, String PDF)
     String res = "";
     res = line.replace("<assets>", "<assets>\n\r<pdf_files name=\"assets/"+PDF+"\"/>");
     return res;

Answer 1

Your PDFLineInsert method is inserting your lines at the beginning of the file.
You should change your logic to write the new lines as you get them. something like this:
          while ((line=in.readLine()) != null)
               if(line.startsWith("<assets>"))
                   out.write(line);
                   out.newLine();
                    for(int i=0;i<lists.length;i++)
                         if(lists.endsWith(".pdf"))
                              out.write("<pdf_files name=\"assets/"+lists[i]+"\"/>");
                              out.newLine();
               out.write(line);
               out.newLine();
               out.flush();
          in.close();
          out.close();
~Tim
EDIT: remove the extra '>' in the write statement inside the for loop. it is caused by a bug in the forum software
Message was edited by:
SomeoneElse