How to create a directory and sub directory structure with java?

Question

Hello there I want to create the directories and sub directories with the java. My directory structure is starts from the current application directory, Means in current projects directory which looks like following...

Images    |    |+ Background    |    |+ Foreground           |           |+Necklace           |+Earrings           |+Etc... 

I know how to create directory but I need to create sub directory I tried with following code what should be next steps ?

File file = new File("Images"); file.mkdir(); 

Answer 1

You can use File.mkdir() or File.mkdirs() to create a directory. Between the two, the latter method is more tolerant and will create all intermediate directories as needed. Also, since I see that you use "\\" in your question, I would suggest using File.separator for a portable path separator string.

Answer 2

Starting from Java 7, you can use the java.nio.file.Files & java.nio.file.Paths classes.

Path path = Paths.get("C:\\Images\\Background\\..\\Foreground\\Necklace\\..\\Earrings\\..\\Etc");  try {     Files.createDirectories(path); } catch (IOException e) {     System.err.println("Cannot create directories - " + e); } 

This is a tricky solution (because I used only one path to go to the whole structure).

If you don't like tricky solutions, you can use 4 simple paths instead:

Path p1 = Paths.get("C:\\Images\\Background"); Path p2 = Paths.get("C:\\Images\\Foreground\\Necklace"); Path p3 = Paths.get("C:\\Images\\Foreground\\Earrings"); Path p4 = Paths.get("C:\\Images\\Foreground\\Etc"); 

and then call the createDirectories method for all of them:

Files.createDirectories(p1); Files.createDirectories(p2); Files.createDirectories(p3); Files.createDirectories(p4);