Re: Query:difference between with "/" and without "/"?

From:
"Andrew Thompson" <u32984@uwe>
Newsgroups:
comp.lang.java.programmer
Date:
Sun, 06 May 2007 15:48:43 GMT
Message-ID:
<71c703a5f2594@uwe>
Jack Dowson wrote:

Hello Everybody:
When we create a File instance,just like:
File file = new File("/home/dowson/");
File file = new File("/home/dowson");
What's the difference between the two sentences?


The last '/'.

More importantly, neither are formed in an x-plat
manner. The best way to do it is.

String sep = System.getProperty("file.separator");

File home = new File(sep + "home");
File target = new File( home, "dowson" );

<sscce>
import java.io.File;
import java.io.IOException;

class FileOperations {

   public static void printFileStatus(File f) {
      String status = ( f.isDirectory() ?
         "DIR" : ( f.isFile() ?
         "FILE" : "NONE"));
      System.out.println(
         "exists: " + f.exists() +
         " \tpath: " + f +
         "\nDir/File: " + status );
   }

   public static void main(String args[])
      throws IOException {

      String sep =
         System.getProperty("file.separator");
      File homey = new File(sep + "homey");
      File boy = new File(homey, "boy" + sep);
      printFileStatus( boy );

      System.out.println(
         "\tcreate the directories");
      boy.mkdirs();
      printFileStatus( boy );

      System.out.println(
         "\tdelete the child directory");
      boy.delete();
      System.out.println(
         "\tcreate the file");
      boy.createNewFile();

      printFileStatus( boy );

      System.out.println(
         "\tdelete the file & parent directory");
      boy.delete();
      homey.delete();

      printFileStatus( boy );
      printFileStatus( homey );
   }
}
</sscce>

HTH

--
Andrew Thompson
http://www.athompson.info/andrew/

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