CODEWITHSUNDEEP
java
user2377755
user2377755

Reputation: 221

appending date time and passing it to create file

i am trying to append current date time to filename and pass it to creation of file...so basically this is my code

public class Main {

    //....

    public static void main(String[] args) throws IOException
    {
        DateFormat dt = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
        Date date = new Date();
        String d =dt.format(date).toString();
        String fname = "spy1";
        File dir = new File("E:\\");
        File f = new File(dir,fname+d+".txt");
        if(f.createNewFile())
        {
            System.out.println("file creates");
        }
        else
        {
            System.out.println("file not created ");
        }
    }
}

this my code please help me in how to append current date time to file name and create the file with mentioned directory

Upvotes: 0

Views: 2352

Answers (1)

hmjd
hmjd

Reputation: 121971

Forward slash, /, and colon, :, are not permitted characters for a filename on windows. From Naming Files, Paths, and Namespaces

Use any character in the current code page for a name, including Unicode
characters and characters in the extended character set (128–255),
except for the following:

- The following reserved characters:

  +  (greater than)
  + : (colon)
  + " (double quote)
  + / (forward slash)
  + \ (backslash)
  + | (vertical bar or pipe)
  + ? (question mark)
  + * (asterisk)

- Integer value zero, sometimes referred to as the ASCII NUL character.
- Characters whose integer representations are in the range from 1 through 31,
except for alternate data streams where these characters are allowed.
For more information about file streams, see File Streams.
- Any other character that the target file system does not allow.

The date format string needs to change. For example:

DateFormat dt = new SimpleDateFormat("yyyy-MM-dd HH-mm-ss");

Upvotes: 6

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