1-Wire API for .NET Version 4.00
Public Member Functions | Static Public Member Functions | Static Public Attributes | Protected Member Functions

OWFile Class Reference

An abstract representation of file and directory pathnames on 1-Wire devices. More...

List of all members.

Public Member Functions

 OWFile (OneWireContainer owd, String pathname)
 Creates a new OWFile instance by converting the given pathname string into an abstract pathname.
 OWFile (OneWireContainer[] owd, String pathname)
 Creates a new OWFile instance by converting the given pathname string into an abstract pathname.
 OWFile (OneWireContainer owd, String parent, String child)
 Creates a new OWFile instance from a parent pathname string and a child pathname string.
 OWFile (OWFile parent, String child)
 Creates a new OWFile instance from a parent abstract pathname and a child pathname string.
String getName ()
 Returns the name of the file or directory denoted by this abstract pathname.
String getParent ()
 Returns the pathname string of this abstract pathname's parent, or null if this pathname does not name a parent directory.
OWFile getParentFile ()
 Returns the abstract pathname of this abstract pathname's parent, or null if this pathname does not name a parent directory.
String getPath ()
 Converts this abstract pathname into a pathname string.
boolean isAbsolute ()
 Tests whether this abstract pathname is absolute.
String getAbsolutePath ()
 Returns the absolute pathname string of this abstract pathname.
OWFile getAbsoluteFile ()
 Returns the absolute form of this abstract pathname.
String getCanonicalPath () throws IOException
 Returns the canonical pathname string of this abstract pathname.
OWFile getCanonicalFile () throws IOException
 Returns the canonical form of this abstract pathname.
boolean canRead ()
 Tests whether the application can read the file denoted by this abstract pathname.
boolean canWrite ()
 Tests whether the application can modify to the file denoted by this abstract pathname.
boolean exists ()
 Tests whether the file denoted by this abstract pathname exists.
boolean isDirectory ()
 Tests whether the file denoted by this abstract pathname is a directory.
boolean isFile ()
 Tests whether the file denoted by this abstract pathname is a normal file.
boolean isHidden ()
 Tests whether the file named by this abstract pathname is a hidden file.
long lastModified ()
 Returns the time that the file denoted by this abstract pathname was last modified.
long length ()
 Returns the length of the file denoted by this abstract pathname.
boolean createNewFile () throws IOException
 Atomically creates a new, empty file named by this abstract pathname if and only if a file with this name does not yet exist.
boolean delete ()
 Deletes the file or directory denoted by this abstract pathname.
String[] list ()
 Returns an array of strings naming the files and directories in the directory denoted by this abstract pathname.
OWFile[] listFiles ()
 Returns an array of abstract pathnames denoting the files in the directory denoted by this abstract pathname.
boolean mkdir ()
 Creates the directory named by this abstract pathname.
boolean mkdirs ()
 Creates the directory named by this abstract pathname, including any necessary but nonexistent parent directories.
boolean renameTo (OWFile dest)
 Renames the file denoted by this abstract pathname.
boolean setLastModified (long time)
 Sets the last-modified time of the file or directory named by this abstract pathname.
boolean setReadOnly ()
 Marks the file or directory named by this abstract pathname so that only read operations are allowed.
int compareTo (OWFile pathname)
 Compares two abstract pathnames lexicographically.
int compareTo (Object o)
 Compares this abstract pathname to another object.
boolean equals (Object obj)
 Tests this abstract pathname for equality with the given object.
int hashCode ()
 Computes a hash code for this abstract pathname.
String toString ()
 Returns the pathname string of this abstract pathname.
OWFileDescriptor getFD () throws IOException
 Returns the OWFileDescriptor object that represents the connection to the actual file in the Filesystem being used by this OWFileInputStream.
OneWireContainer getOneWireContainer ()
 Gets the OneWireContainer that this File resides on.
OneWireContainer[] getOneWireContainers ()
 Gets the OneWireContainer(s) that this File resides on.
void format () throws IOException
 Format the Filesystem on the 1-Wire device provided in the constructor.
int getFreeMemory () throws IOException
 Gets the number of bytes available on this device for file and directory information.
void close () throws IOException
 Closes this file and releases any system resources associated with this stream.
int[] getPageList () throws IOException
 Get's an array of integers that represents the page list of the file or directory represented by this OWFile.
int getStartPage () throws IOException
 Returns an integer which represents the starting memory page of the file or directory represented by this OWFile.
PagedMemoryBank getMemoryBankForPage (int page)
 Get's the memory bank object for the specified page.
int getLocalPage (int page)
 Get's the local page number on the memory bank object for the specified page.

Static Public Member Functions

static OWFile[] listRoots (OneWireContainer owc)
 List the available filesystem roots.

Static Public Attributes

static final String separator = "/"
 Field separator.
static final char separatorChar = '/'
 Field separatorChar.
static final String pathSeparator = ":"
 Field pathSeparator.
static final char pathSeparatorChar = ':'
 Field pathSeparatorChar.

Protected Member Functions

void finalize () throws IOException
 Cleans up the connection to the file, and ensures that the close method of this file output stream is called when there are no more references to this stream.

Detailed Description

An abstract representation of file and directory pathnames on 1-Wire devices.

User interfaces and operating systems use system-dependent pathname strings to name files and directories. This class presents an abstract, system-independent view of hierarchical pathnames. An abstract pathname has two components:

  1. An optional system-dependent prefix string,
    such as a disk-drive specifier, "/" for the UNIX root directory, or "\\" for a Win32 UNC pathname, and
  2. A sequence of zero or more string names.

Each name in an abstract pathname except for the last denotes a directory; the last name may denote either a directory or a file. The empty abstract pathname has no prefix and an empty name sequence.

The conversion of a pathname string to or from an abstract pathname is inherently system-dependent. When an abstract pathname is converted into a pathname string, each name is separated from the next by a single copy of the default separator character. The default name-separator character is defined by the system property OWFile.separator, and is made available in the public static fields separator and separatorChar of this class. When a pathname string is converted into an abstract pathname, the names within it may be separated by the default name-separator character or by any other name-separator character that is supported by the underlying system.

A pathname, whether abstract or in string form, may be either absolute or relative. An absolute pathname is complete in that no other information is required in order to locate the file that it denotes. A relative pathname, in contrast, must be interpreted in terms of information taken from some other pathname. By default the classes in the java.io package always resolve relative pathnames against the current user directory. This directory is named by the system property user.dir, and is typically the directory in which the Java virtual machine was invoked. The pathname provided to this OWFile however is always absolute.

The prefix concept is used to handle root directories on UNIX platforms, and drive specifiers, root directories and UNC pathnames on Win32 platforms, as follows:

Instances of the OWFile class are immutable; that is, once created, the abstract pathname represented by a OWFile object will never change.

What is Different on the 1-Wire Filesystem

The methods in the class are the same as in the java.io.File version 1.2 with the following exceptions

Methods provided but of limited functionallity

Methods not provided or supported:

Extra Methods (not usually in 1.2 java.io.File)

File and directory name limitations

Tips

Usage

Example 1

Format the Filesystem of the 1-Wire device 'owd':

 
   // create a 1-Wire file at root
   OWFile owfile = new OWFile(owd, "");
   // format Filesystem
   owfile.format();
   // get 1-Wire File descriptor to flush to device
   OWFileDescriptor owfd = owfile.getFD();
   // loop until sync is successful
   do
   {
      try
      {
         owfd.sync();
         done = true;
      }
      catch (SyncFailedException e)
      {
         // do something
         ...
         done = false;
      }
   }
   while (!done)
   // close the 1-Wire file to release system resources
   owfile.close();
  

Example 2

Make a multi-level directory structure on the 1-Wire device 'owd':

 
   OWFile owfile = new OWFile(owd, "/doc/text/temp");
   // make the directories
   if (owfile.mkdirs())
      System.out.println("Success!");
   else
      System.out.println("Out of memory or invalid file/directory");
   // get 1-Wire File descriptor to flush to device
   ...
  

1-Wire File Structure Format

http://pdfserv.maxim-ic.com/arpdf/AppNotes/app114.pdf

See also:
com.dalsemi.onewire.application.file.OWFileDescriptor
com.dalsemi.onewire.application.file.OWFileInputStream
com.dalsemi.onewire.application.file.OWFileOutputStream
Author:
DS
Version:
0.01, 1 June 2001

Constructor & Destructor Documentation

OWFile ( OneWireContainer  owd,
String  pathname 
)

Creates a new OWFile instance by converting the given pathname string into an abstract pathname.

If the given string is the empty string, then the result is the empty abstract pathname.

Parameters:
owdOneWireContainer that this Filesystem resides on
pathnameA pathname string
Exceptions:
NullPointerExceptionIf the pathname argument is null
OWFile ( OneWireContainer[]  owd,
String  pathname 
)

Creates a new OWFile instance by converting the given pathname string into an abstract pathname.

If the given string is the empty string, then the result is the empty abstract pathname.

Parameters:
owdordered array of OneWireContainers that this Filesystem resides on
pathnameA pathname string
Exceptions:
NullPointerExceptionIf the pathname argument is null

Change the OWFileDescriptor to accept only an array of containers Change the local ref to be an array Create a single array in constructors with single passed owc

OWFile ( OneWireContainer  owd,
String  parent,
String  child 
)

Creates a new OWFile instance from a parent pathname string and a child pathname string.

If parent is null then the new OWFile instance is created as if by invoking the single-argument OWFile constructor on the given child pathname string.

Otherwise the parent pathname string is taken to denote a directory, and the child pathname string is taken to denote either a directory or a file. If the child pathname string is absolute then it is converted into a relative pathname in a system-dependent way. If parent is the empty string then the new OWFile instance is created by converting child into an abstract pathname and resolving the result against a system-dependent default directory. Otherwise each pathname string is converted into an abstract pathname and the child abstract pathname is resolved against the parent.

Parameters:
owdOneWireContainer that this Filesystem resides on
parentThe parent pathname string
childThe child pathname string
Exceptions:
NullPointerExceptionIf child is null
OWFile ( OWFile  parent,
String  child 
)

Creates a new OWFile instance from a parent abstract pathname and a child pathname string.

If parent is null then the new OWFile instance is created as if by invoking the single-argument OWFile constructor on the given child pathname string.

Otherwise the parent abstract pathname is taken to denote a directory, and the child pathname string is taken to denote either a directory or a file. If the child pathname string is absolute then it is converted into a relative pathname in a system-dependent way. If parent is the empty abstract pathname then the new OWFile instance is created by converting child into an abstract pathname and resolving the result against a system-dependent default directory. Otherwise each pathname string is converted into an abstract pathname and the child abstract pathname is resolved against the parent.

Parameters:
owdOneWireContainer that this Filesystem resides on
parentThe parent abstract pathname
childThe child pathname string
Exceptions:
NullPointerExceptionIf child is null

Member Function Documentation

boolean canRead ( )

Tests whether the application can read the file denoted by this abstract pathname.

Returns:
true if and only if the file specified by this abstract pathname exists and can be read by the application; false otherwise
boolean canWrite ( )

Tests whether the application can modify to the file denoted by this abstract pathname.

Returns:
true if and only if the Filesystem actually contains a file denoted by this abstract pathname and the application is allowed to write to the file; false otherwise.
void close ( ) throws IOException

Closes this file and releases any system resources associated with this stream.

This file may no longer be used after this operation.

Exceptions:
IOExceptionif an I/O error occurs.
int compareTo ( OWFile  pathname)

Compares two abstract pathnames lexicographically.

The ordering defined by this method depends upon the underlying system. On UNIX systems, alphabetic case is significant in comparing pathnames; on Win32 systems it is not.

Parameters:
pathnameThe abstract pathname to be compared to this abstract pathname
Returns:
Zero if the argument is equal to this abstract pathname, a value less than zero if this abstract pathname is lexicographically less than the argument, or a value greater than zero if this abstract pathname is lexicographically
  • greater than the argument
int compareTo ( Object  o)

Compares this abstract pathname to another object.

If the other object is an abstract pathname, then this function behaves like compareTo(OWFile). Otherwise, it throws a ClassCastException, since abstract pathnames can only be compared to abstract pathnames.

Parameters:
oThe Object to be compared to this abstract pathname
Returns:
If the argument is an abstract pathname, returns zero if the argument is equal to this abstract pathname, a value less than zero if this abstract pathname is lexicographically less than the argument, or a value greater than zero if this abstract pathname is lexicographically greater than the argument
Exceptions:
<code>ClassCastException</code>if the argument is not an abstract pathname
See also:
java.lang.Comparable
boolean createNewFile ( ) throws IOException

Atomically creates a new, empty file named by this abstract pathname if and only if a file with this name does not yet exist.

The check for the existence of the file and the creation of the file if it does not exist are a single operation that is atomic with respect to all other filesystem activities that might affect the file.

Returns:
true if the named file does not exist and was successfully created; false if the named file already exists
Exceptions:
IOExceptionIf an I/O error occurred
boolean delete ( )

Deletes the file or directory denoted by this abstract pathname.

If this pathname denotes a directory, then the directory must be empty in order to be deleted.

Returns:
true if and only if the file or directory is successfully deleted; false otherwise
boolean equals ( Object  obj)

Tests this abstract pathname for equality with the given object.

Returns true if and only if the argument is not null and is an abstract pathname that denotes the same file or directory as this abstract pathname. Whether or not two abstract pathnames are equal depends upon the underlying system. On UNIX systems, alphabetic case is significant in comparing pathnames; on Win32 systems it is not.

Parameters:
objThe object to be compared with this abstract pathname
Returns:
true if and only if the objects are the same; false otherwise
boolean exists ( )

Tests whether the file denoted by this abstract pathname exists.

Returns:
true if and only if the file denoted by this abstract pathname exists; false otherwise
void finalize ( ) throws IOException [protected]

Cleans up the connection to the file, and ensures that the close method of this file output stream is called when there are no more references to this stream.

Exceptions:
IOExceptionif an I/O error occurs.
See also:
java.io.FileInputStream.close()
void format ( ) throws IOException

Format the Filesystem on the 1-Wire device provided in the constructor.

This operation is required before any file IO is possible.

WARNING this will remove any files/directories.

Exceptions:
IOExceptionif an I/O error occurs.
OWFile getAbsoluteFile ( )

Returns the absolute form of this abstract pathname.

Equivalent to new File(this.getAbsolutePath()).

Returns:
The absolute abstract pathname denoting the same file or directory as this abstract pathname
String getAbsolutePath ( )

Returns the absolute pathname string of this abstract pathname.

If this abstract pathname is already absolute, then the pathname string is simply returned as if by the getPath method. If this abstract pathname is the empty abstract pathname then the pathname string of the current user directory, which is named by the system property user.dir, is returned. Otherwise this pathname is resolved in a system-dependent way. On UNIX systems, a relative pathname is made absolute by resolving it against the current user directory. On Win32 systems, a relative pathname is made absolute by resolving it against the current directory of the drive named by the pathname, if any; if not, it is resolved against the current user directory.

Returns:
The absolute pathname string denoting the same file or directory as this abstract pathname
See also:
java.io.File.isAbsolute()
OWFile getCanonicalFile ( ) throws IOException

Returns the canonical form of this abstract pathname.

Equivalent to new File(this.getCanonicalPath()).

Returns:
The canonical pathname string denoting the same file or directory as this abstract pathname
Exceptions:
IOExceptionIf an I/O error occurs, which is possible because the construction of the canonical pathname may require filesystem queries
String getCanonicalPath ( ) throws IOException

Returns the canonical pathname string of this abstract pathname.

The precise definition of canonical form is system-dependent, but canonical forms are always absolute. Thus if this abstract pathname is relative it will be converted to absolute form as if by the getAbsoluteFile method.

Every pathname that denotes an existing file or directory has a unique canonical form. Every pathname that denotes a nonexistent file or directory also has a unique canonical form. The canonical form of the pathname of a nonexistent file or directory may be different from the canonical form of the same pathname after the file or directory is created. Similarly, the canonical form of the pathname of an existing file or directory may be different from the canonical form of the same pathname after the file or directory is deleted.

Returns:
The canonical pathname string denoting the same file or directory as this abstract pathname
Exceptions:
IOExceptionIf an I/O error occurs, which is possible because the construction of the canonical pathname may require filesystem queries
Since:
JDK1.1
OWFileDescriptor getFD ( ) throws IOException

Returns the OWFileDescriptor object that represents the connection to the actual file in the Filesystem being used by this OWFileInputStream.

Returns:
the file descriptor object associated with this File.
Exceptions:
IOExceptionif an I/O error occurs.
See also:
com.dalsemi.onewire.application.file.OWFileDescriptor
int getFreeMemory ( ) throws IOException

Gets the number of bytes available on this device for file and directory information.

Returns:
number of free bytes in the Filesystem
Exceptions:
IOExceptionif an I/O error occurs
int getLocalPage ( int  page)

Get's the local page number on the memory bank object for the specified page.

This is significant if the Filesystem spans memory banks on the same or different devices.

Returns:
local page for the specified Filesystem page (memory bank specific)
PagedMemoryBank getMemoryBankForPage ( int  page)

Get's the memory bank object for the specified page.

This is significant if the Filesystem spans memory banks on the same or different devices.

Returns:
PagedMemoryBank for the specified page
String getName ( )

Returns the name of the file or directory denoted by this abstract pathname.

This is just the last name in the pathname's name sequence. If the pathname's name sequence is empty, then the empty string is returned.

Returns:
The name of the file or directory denoted by this abstract pathname, or the empty string if this pathname's name sequence is empty
OneWireContainer getOneWireContainer ( )

Gets the OneWireContainer that this File resides on.

This is where the 'filesystem' resides. If this Filesystem spans multiple devices then this method returns the 'MASTER' device.

Returns:
the OneWireContainer for this Filesystem
OneWireContainer [] getOneWireContainers ( )

Gets the OneWireContainer(s) that this File resides on.

This is where the 'filesystem' resides. The first device is the 'MASTER' device and the other devices are 'SATELLITE' devices.

Returns:
the OneWireContainer(s) for this Filesystem
int [] getPageList ( ) throws IOException

Get's an array of integers that represents the page list of the file or directory represented by this OWFile.

Returns:
node page list file or directory
Exceptions:
IOExceptionif an I/O error occurs.
String getParent ( )

Returns the pathname string of this abstract pathname's parent, or null if this pathname does not name a parent directory.

The parent of an abstract pathname consists of the pathname's prefix, if any, and each name in the pathname's name sequence except for the last. If the name sequence is empty then the pathname does not name a parent directory.

Returns:
The pathname string of the parent directory named by this abstract pathname, or null if this pathname does not name a parent
OWFile getParentFile ( )

Returns the abstract pathname of this abstract pathname's parent, or null if this pathname does not name a parent directory.

The parent of an abstract pathname consists of the pathname's prefix, if any, and each name in the pathname's name sequence except for the last. If the name sequence is empty then the pathname does not name a parent directory.

Returns:
The abstract pathname of the parent directory named by this abstract pathname, or null if this pathname does not name a parent
String getPath ( )

Converts this abstract pathname into a pathname string.

The resulting string uses the default name-separator character to separate the names in the name sequence.

Returns:
The string form of this abstract pathname
int getStartPage ( ) throws IOException

Returns an integer which represents the starting memory page of the file or directory represented by this OWFile.

Returns:
The starting page of the file or directory.
Exceptions:
IOExceptionif the file doesn't exist
int hashCode ( )

Computes a hash code for this abstract pathname.

Because equality of abstract pathnames is inherently system-dependent, so is the computation of their hash codes. On UNIX systems, the hash code of an abstract pathname is equal to the exclusive or of its pathname string and the decimal value 1234321. On Win32 systems, the hash code is equal to the exclusive or of its pathname string, convered to lower case, and the decimal value 1234321.

Returns:
A hash code for this abstract pathname
boolean isAbsolute ( )

Tests whether this abstract pathname is absolute.

The definition of absolute pathname is system dependent. On UNIX systems, a pathname is absolute if its prefix is "/". On Win32 systems, a pathname is absolute if its prefix is a drive specifier followed by "\\", or if its prefix is "\\".

Returns:
true if this abstract pathname is absolute, false otherwise
boolean isDirectory ( )

Tests whether the file denoted by this abstract pathname is a directory.

Returns:
true if and only if the file denoted by this abstract pathname exists and is a directory; false otherwise
boolean isFile ( )

Tests whether the file denoted by this abstract pathname is a normal file.

A file is normal if it is not a directory and, in addition, satisfies other system-dependent criteria. Any non-directory file created by a Java application is guaranteed to be a normal file.

Returns:
true if and only if the file denoted by this abstract pathname exists and is a normal file; false otherwise
boolean isHidden ( )

Tests whether the file named by this abstract pathname is a hidden file.

The exact definition of hidden is system-dependent. On UNIX systems, a file is considered to be hidden if its name begins with a period character ('.'). On Win32 systems, a file is considered to be hidden if it has been marked as such in the filesystem.

Returns:
true if and only if the file denoted by this abstract pathname is hidden according to the conventions of the underlying platform
long lastModified ( )

Returns the time that the file denoted by this abstract pathname was last modified.

Returns:
A long value representing the time the file was last modified, measured in milliseconds since the epoch (00:00:00 GMT, January 1, 1970), or 0L if the file does not exist or if an I/O error occurs
long length ( )

Returns the length of the file denoted by this abstract pathname.

Returns:
The length, in bytes, of the file denoted by this abstract pathname, or 0L if the file does not exist
String [] list ( )

Returns an array of strings naming the files and directories in the directory denoted by this abstract pathname.

If this abstract pathname does not denote a directory, then this method returns null. Otherwise an array of strings is returned, one for each file or directory in the directory. Names denoting the directory itself and the directory's parent directory are not included in the result. Each string is a file name rather than a complete path.

There is no guarantee that the name strings in the resulting array will appear in any specific order; they are not, in particular, guaranteed to appear in alphabetical order.

Returns:
An array of strings naming the files and directories in the directory denoted by this abstract pathname. The array will be empty if the directory is empty. Returns null if this abstract pathname does not denote a directory, or if an I/O error occurs.
OWFile [] listFiles ( )

Returns an array of abstract pathnames denoting the files in the directory denoted by this abstract pathname.

If this abstract pathname does not denote a directory, then this method returns null. Otherwise an array of OWFile objects is returned, one for each file or directory in the directory. Pathnames denoting the directory itself and the directory's parent directory are not included in the result. Each resulting abstract pathname is constructed from this abstract pathname using the OWFile(OWFile, String) constructor. Therefore if this pathname is absolute then each resulting pathname is absolute; if this pathname is relative then each resulting pathname will be relative to the same directory.

There is no guarantee that the name strings in the resulting array will appear in any specific order; they are not, in particular, guaranteed to appear in alphabetical order.

Returns:
An array of abstract pathnames denoting the files and directories in the directory denoted by this abstract pathname. The array will be empty if the directory is empty. Returns null if this abstract pathname does not denote a directory, or if an I/O error occurs.
static OWFile [] listRoots ( OneWireContainer  owc) [static]

List the available filesystem roots.

A particular Java platform may support zero or more hierarchically-organized Filesystems. Each Filesystem has a root directory from which all other files in that file system can be reached. Windows platforms, for example, have a root directory for each active drive; UNIX platforms have a single root directory, namely "/". The set of available filesystem roots is affected by various system-level operations such the insertion or ejection of removable media and the disconnecting or unmounting of physical or virtual disk drives.

This method returns an array of OWFile objects that denote the root directories of the available filesystem roots. It is guaranteed that the canonical pathname of any file physically present on the local machine will begin with one of the roots returned by this method.

The canonical pathname of a file that resides on some other machine and is accessed via a remote-filesystem protocol such as SMB or NFS may or may not begin with one of the roots returned by this method. If the pathname of a remote file is syntactically indistinguishable from the pathname of a local file then it will begin with one of the roots returned by this method. Thus, for example, OWFile objects denoting the root directories of the mapped network drives of a Windows platform will be returned by this method, while OWFile objects containing UNC pathnames will not be returned by this method.

Parameters:
owcOneWireContainer that this Filesystem resides on
Returns:
An array of OWFile objects denoting the available filesystem roots, or null if the set of roots could not be determined. The array will be empty if there are no filesystem roots.
boolean mkdir ( )

Creates the directory named by this abstract pathname.

Returns:
true if and only if the directory was created; false otherwise
boolean mkdirs ( )

Creates the directory named by this abstract pathname, including any necessary but nonexistent parent directories.

Note that if this operation fails it may have succeeded in creating some of the necessary parent directories.

Returns:
true if and only if the directory was created, along with all necessary parent directories; false otherwise
boolean renameTo ( OWFile  dest)

Renames the file denoted by this abstract pathname.

Parameters:
destThe new abstract pathname for the named file
Returns:
true if and only if the renaming succeeded; false otherwise
Exceptions:
NullPointerExceptionIf parameter dest is null
boolean setLastModified ( long  time)

Sets the last-modified time of the file or directory named by this abstract pathname.

All platforms support file-modification times to the nearest second, but some provide more precision. The argument will be truncated to fit the supported precision. If the operation succeeds and no intervening operations on the file take place, then the next invocation of the lastModified method will return the (possibly truncated) time argument that was passed to this method.

Parameters:
timeThe new last-modified time, measured in milliseconds since the epoch (00:00:00 GMT, January 1, 1970)
Returns:
true if and only if the operation succeeded; false otherwise
Exceptions:
IllegalArgumentExceptionIf the argument is negative
boolean setReadOnly ( )

Marks the file or directory named by this abstract pathname so that only read operations are allowed.

After invoking this method the file or directory is guaranteed not to change until it is either deleted or marked to allow write access. Whether or not a read-only file or directory may be deleted depends upon the underlying system.

Returns:
true if and only if the operation succeeded; false otherwise
String toString ( )

Returns the pathname string of this abstract pathname.

This is just the string returned by the getPath method.

Returns:
The string form of this abstract pathname

The documentation for this class was generated from the following file: