I'm trying to create a folder with the name equal to the current date but it just does not create.
import java.util.*;
import java.io.File;
public class PastaData {
Date data = new Date();
SimpleDateFormat formatar = new SimpleDateFormat("d/m/y");
String dataFormatada = new formatar.format(data);
System.out.println("dataFormatada");
File file = new File(dataFormatada);
file.mkdir();
}
The problem is that windows does not allow creating files or folders with / , it is an invalid character.
Change the date formatting mask to% cos_de% and it will work normally.
And do not forget to import the "d-m-y" class.
the example below:
import java.util.*;
import java.io.File;
import java.text.SimpleDateFormat;
public class PastaData {
public static void main(String[] args) {
Date data = new Date();
SimpleDateFormat formatar = new SimpleDateFormat("d-m-y");
String dataFormatada = formatar.format(data);
try{
File f = new File(dataFormatada);
System.out.println(dataFormatada);
f.mkdir();
}catch(Exception e){
e.printStackTrace();
}
}
}
Official Reference: Naming Files, Paths, and Namespaces
You can use LocalDate#now().toString() to return the current date in yyyy-mm-dd format:
final String directory = LocalDate.now().toString();
Files.createDirectory(Paths.get("C:", directory)); // cria um diretório na unidade C: