Does anyone know how to create a file in a directory where the directory has not yet been created?

i.e. dir1/dir2/dir3/myFile.txt (where dir1, dir2 and dir3 are created if they don't already exist).

I wrote this little app for testing:
Code:
import java.io.*;

public class Writing {
        public static void main(String[] args) throws IOException {
                File target = new File(args[0]);
                if (!target.exists()) {
                        boolean success = target.createNewFile();
                        System.out.println("Attempted to create new file..." + success);
                }
                PrintStream ps = new PrintStream(new FileOutputStream(target));
                ps.println("Hello");
        }
}