How to Write the output into txt file using FileWriter

Question

This is my java code to find the locations of files inside the directory and write them into a txt file as the output ,but after compilation the contents are not writing into txt file. please give me some solution.

public void listFilesAndFilesSubDirectories(String directoryName)
{
    File directory = new File(directoryName);
    List<String> list=new ArrayList<String> ();
    //get all the files from a directory
    if(directory.exists()){
        File[] fList = directory.listFiles();
        for (File file : fList){
            if (file.isFile()){
                if(file.getName().endsWith(".c")==true || file.getName().endsWith(".h")==true){
                    // System.out.println(file.getAbsolutePath());
                    list.add(file.getAbsolutePath());
                }
            } else if (file.isDirectory()){
                listFilesAndFilesSubDirectories(file.getAbsolutePath());
            }
            else break;
        }

        try{
            FileWriter fw=new FileWriter("C:/Users/Public/afreen/module.txt");
            BufferedWriter out = new BufferedWriter(fw);

            for(String str: list)
            {
                System.out.println(str);
                out.write(str);
            }
            out.flush();
            out.close();
        }
        catch(Exception  e)
        {
            System.out.println(e);
        }
        System.out.println("Success....");
    }
    else
    {
        System.out.println("The directory is not exist , please enter a valid path");
    }
}

The above code will take the input as the path for directory and finds the location of files which I want.But the locations are not able to write into txt file,I am not abel to find the actual reason ,please help me out to find the solution of it.

Answer 1

Each time your method gets called (recursively) creates a new list and add the directory name to it but that list is not the one you are printing from, try to use a shared resource.
for example use a global variable or etc.