Work with temporary files in Java

  

/*
 * Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
 * All rights reserved. Software written by Ian F. Darwin and others.
 * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 * Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
 * cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
 * pioneering role in inventing and promulgating (and standardizing) the Java 
 * language and environment is gratefully acknowledged.
 * 
 * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
 * inventing predecessor languages C and C++ is also gratefully acknowledged.
 */

import java.io.File;
import java.io.IOException;

/**
 * Work with temporary files in Java.
 * 
 * @author Ian F. Darwin, http://www.darwinsys.com/
 * @version $Id: TempFiles.java,v 1.3 2004/02/09 03:33:47 ian Exp $
 */
public class TempFiles {
  public static void main(String[] argv) throws IOException {

    // 1. Make an existing file temporary

    // Construct a File object for the backup created by editing
    // this source file. The file probably already exists.
    // My editor creates backups by putting ~ at the end of the name.
    File bkup = new File("Rename.java~");
    // Arrange to have it deleted when the program ends.
    bkup.deleteOnExit();

    // 2. Create a new temporary file.

    // Make a file object for foo.tmp, in the default temp directory
    File tmp = File.createTempFile("foo", "tmp");
    // Report on the filename that it made up for us.
    System.out.println("Your temp file is " + tmp.getCanonicalPath());
    // Arrange for it to be deleted at exit.
    tmp.deleteOnExit();
    // Now do something with the temporary file, without having to
    // worry about deleting it later.
    writeDataInTemp(tmp.getCanonicalPath());
  }

  public static void writeDataInTemp(String tempnam) {
    // This version is dummy. Use your imagination.
  }
}

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38.	List drives
39.	Listing the Directory Contents
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41.	Forcing Updates to a File to the Disk
42.	Random File
43.	Create a directory; all ancestor directories must exist
44.	Create a directory; all non-existent ancestor directories are automatically created
45.	Getting the Current Working Directory
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49.	Choose a File
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63.	Change a file attribute to read only
64.	Get file extension name
65.	Search for files recursively
66.	Create a human-readable file size
67.	Set file attributes.
68.	Format file length in string
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Work with temporary files in Java : Files « File Input Output « Java

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