Java's createNewFile() - will it also create directories?

Admin 1
Viewed 96068

I've got a conditional to check if a certain file exists before proceeding (./logs/error.log). If it isn't found I want to create it. However, will

File tmp = new File("logs/error.log");
tmp.createNewFile();

also create logs/ if it doesn't exist?

io directory file java
6 Answers

Java 8 Style

Path path = Paths.get("logs/error.log");
Files.createDirectories(path.getParent());

To write on file

Files.write(path, "Log log".getBytes());

To read 

System.out.println(Files.readAllLines(path));

Full example

public class CreateFolderAndWrite {

    public static void main(String[] args) {
        try {
            Path path = Paths.get("logs/error.log");
            Files.createDirectories(path.getParent());

            Files.write(path, "Log log".getBytes());

            System.out.println(Files.readAllLines(path));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
user_6524140

No, and if logs does not exist you'll receive java.io.IOException: No such file or directory

Fun fact for android devs: calls the likes of Files.createDirectories() and Paths.get() would work when supporting min api 26.

user_53321100
Related