Java compact1, compact2, compact3 java.nio.file.attribute Interface BasicFileAttributeView（JDK8）

Method Detail

• name

  String name()

  Returns the name of the attribute view. Attribute views of this type have the name "basic".

  Specified by:

  name in interface AttributeView

  Returns:

  the name of the attribute view

• readAttributes

  BasicFileAttributes readAttributes()
                              throws IOException

  Reads the basic file attributes as a bulk operation.

  It is implementation specific if all file attributes are read as an atomic operation with respect to other file system operations.

  Returns:

  the file attributes

  Throws:

  IOException - if an I/O error occurs

  SecurityException - In the case of the default provider, a security manager is installed, its checkRead method is invoked to check read access to the file

• setTimes

  void setTimes(FileTime lastModifiedTime,
                FileTime lastAccessTime,
                FileTime createTime)
         throws IOException

  Updates any or all of the file's last modified time, last access time, and create time attributes.

  This method updates the file's timestamp attributes. The values are converted to the epoch and precision supported by the file system. Converting from finer to coarser granularities result in precision loss. The behavior of this method when attempting to set a timestamp that is not supported or to a value that is outside the range supported by the underlying file store is not defined. It may or not fail by throwing an IOException.

  If any of the lastModifiedTime, lastAccessTime, or createTime parameters has the value null then the corresponding timestamp is not changed. An implementation may require to read the existing values of the file attributes when only some, but not all, of the timestamp attributes are updated. Consequently, this method may not be an atomic operation with respect to other file system operations. Reading and re-writing existing values may also result in precision loss. If all of the lastModifiedTime, lastAccessTime and createTime parameters are null then this method has no effect.

  Usage Example: Suppose we want to change a file's last access time.

      Path path = ...
      FileTime time = ...
      Files.getFileAttributeView(path, BasicFileAttributeView.class).setTimes(null, time, null);
   

  Parameters:

  lastModifiedTime - the new last modified time, or null to not change the value

  lastAccessTime - the last access time, or null to not change the value

  createTime - the file's create time, or null to not change the value

  Throws:

  IOException - if an I/O error occurs

  SecurityException - In the case of the default provider, a security manager is installed, its checkWrite method is invoked to check write access to the file

  See Also:

  Files.setLastModifiedTime(java.nio.file.Path, java.nio.file.attribute.FileTime)