Creates a new and empty directory in the default temp directory using the given prefix. : Directory « File Input Output « Java

1. Java
2. File Input Output
3. Directory

Creates a new and empty directory in the default temp directory using the given prefix.

   
/*
 * Copyright Aduna (http://www.aduna-software.com/) (c) 1997-2006.
 *
 * Licensed under the Aduna BSD-style license.
 */
import java.io.File;
import java.io.IOException;

public class Main {
  
  /**
   * Creates a new and empty directory in the default temp directory using the
   * given prefix. This methods uses {@link File#createTempFile} to create a
   * new tmp file, deletes it and creates a directory for it instead.
   * 
   * @param prefix The prefix string to be used in generating the diretory's
   * name; must be at least three characters long.
   * @return A newly-created empty directory.
   * @throws IOException If no directory could be created.
   */
  public static File createTempDir(String prefix)
    throws IOException
  {
    String tmpDirStr = System.getProperty("java.io.tmpdir");
    if (tmpDirStr == null) {
      throw new IOException(
        "System property 'java.io.tmpdir' does not specify a tmp dir");
    }
    
    File tmpDir = new File(tmpDirStr);
    if (!tmpDir.exists()) {
      boolean created = tmpDir.mkdirs();
      if (!created) {
        throw new IOException("Unable to create tmp dir " + tmpDir);
      }
    }
    
    File resultDir = null;
    int suffix = (int)System.currentTimeMillis();
    int failureCount = 0;
    do {
      resultDir = new File(tmpDir, prefix + suffix % 10000);
      suffix++;
      failureCount++;
    }
    while (resultDir.exists() && failureCount < 50);
    
    if (resultDir.exists()) {
      throw new IOException(failureCount + 
        " attempts to generate a non-existent directory name failed, giving up");
    }
    boolean created = resultDir.mkdir();
    if (!created) {
      throw new IOException("Failed to create tmp directory");
    }
    
    return resultDir;
  }

}

   
    
    
  

Related examples in the same category

1.	Create directory
2.	Create directory along with required nonexistent parent directories
3.	Create directory tree (nested/cascade folders)
4.	Create a directories recursively
5.	Copying a Directory: Copies files under srcDir to dstDir, if dstDir does not exist, it will be created.
6.	Delete a non-empty directory: Deletes all files and subdirectories under dir.
7.	Listing the Files or Subdirectories in a Directory
8.	Listing the File System Roots
9.	The Directory Listing Application
10.	use list( ) to examine the contents of a directory:
11.	Reading and Printing a Directory Hierarchy
12.	Display a file system in a JTree view
13.	File Tree Demo
14.	File Table HTML
15.	A standalone program that deletes a specified file or directory
16.	Get Last modification time of a file or directory
17.	Set last modified time of a file or directory
18.	List contents of a directory
19.	Determine if file or directory exists
20.	Determine if File or Directory is hidden
21.	Check if a directory is not empty
22.	Get name of parent directory
23.	Get name of specified file or directory
24.	Get current directory
25.	Mark file or directory Read Only
26.	Rename file or directory
27.	Traversing all files and directories under dir
28.	Traversing only directories under dir
29.	Traversing only files under dir
30.	Creates and displays a window containing a list of files and sub-directories in a specified directory
31.	Calculate directory size
32.	Delete directory recursively
33.	Determining If Two Filename Paths Refer to the Same File
34.	Recursive directory deletion
35.	Recursivly delete directory
36.	Searches through the directory tree
37.	Starts at the directory given and tests to see whether it is empty
38.	Directory Walker
39.	Utility methods for handling files and directories
40.	Count files in a directory (including files in all subdirectories)
41.	Create a unique directory within a directory 'root'
42.	Creates a new empty temporary directory.
43.	Get Files Recurse
44.	Recursively search a directory tree
45.	Find directories