How to list directory items from a directory java

Question

I am building a program where the input is a directory path and the output should show all files in this path, including the files from a directory, which are in the given path. For example: Input: C: Output: C:/Directory1 and C:/Directory1/file1.pdf.

static string Directory = sc.next();
static File folder = new File(Directory);
static File[]listofFiles = folder.listFiles();

public static void ListOfFilesInADirectory (final File folder) {
for (int i = 0; i < listofFiles.length; i++) { 
              if (listofFiles[i].isFile()) {           
                System.out.println("File " + listofFiles[i].getName());
              } else if (listofFiles[i].isDirectory()) { 
                System.out.println("Directory " + listofFiles[i].getName());
              }
            }
    }

The code above is the code for the input of the directory and the output of all the files in this directory, but not them in a folder, of this directory. How can I show the files in folders of the director too?

Dayton Rumbold · Accepted Answer · 2023-02-20T14:07:50.580

It sounds like you want something like this...

\---folder
    |   file1.txt
    |   file2.txt
    |
    \---subfolder
            file3.txt
            file4.txt

To print...

folder\file1.txt
folder\file2.txt
folder\subfolder\file3.txt
folder\subfolder\file4.txt

If that assumption is right, one solution is to try using java.nio.file.Files.walk(Path).

Files.walk(Paths.get("folder"))
        .filter(Files::isRegularFile)
        .forEach(System.out::println);//print out the files in all directories from root

Files.walk(path) can return those subfolder files by walking the file tree rooted at the start file given.

How to list directory items from a directory java

1 Answers1