public enum StandardOpenOption extends Enum<StandardOpenOption> implements OpenOption
| Enum Constant and Description | 
|---|
| APPENDIf the file is opened for  WRITEaccess then bytes will be written
 to the end of the file rather than the beginning. | 
| CREATECreate a new file if it does not exist. | 
| CREATE_NEWCreate a new file, failing if the file already exists. | 
| DELETE_ON_CLOSEDelete on close. | 
| DSYNCRequires that every update to the file's content be written
 synchronously to the underlying storage device. | 
| READOpen for read access. | 
| SPARSESparse file. | 
| SYNCRequires that every update to the file's content or metadata be written
 synchronously to the underlying storage device. | 
| TRUNCATE_EXISTINGIf the file already exists and it is opened for  WRITEaccess, then its length is truncated to 0. | 
| WRITEOpen for write access. | 
| Modifier and Type | Method and Description | 
|---|---|
| static StandardOpenOption | valueOf(String name)Returns the enum constant of this type with the specified name. | 
| static StandardOpenOption[] | values()Returns an array containing the constants of this enum type, in
the order they are declared. | 
public static final StandardOpenOption READ
public static final StandardOpenOption WRITE
public static final StandardOpenOption APPEND
WRITE access then bytes will be written
 to the end of the file rather than the beginning.
 If the file is opened for write access by other programs, then it is file system specific if writing to the end of the file is atomic.
public static final StandardOpenOption TRUNCATE_EXISTING
public static final StandardOpenOption CREATE
CREATE_NEW option is also set.
 The check for the existence of the file and the creation of the file
 if it does not exist is atomic with respect to other file system
 operations.public static final StandardOpenOption CREATE_NEW
public static final StandardOpenOption DELETE_ON_CLOSE
close method. If the close method is
 not invoked then a best effort attempt is made to delete the
 file when the Java virtual machine terminates (either normally, as
 defined by the Java Language Specification, or where possible, abnormally).
 This option is primarily intended for use with work files that
 are used solely by a single instance of the Java virtual machine. This
 option is not recommended for use when opening files that are open
 concurrently by other entities. Many of the details as to when and how
 the file is deleted are implementation specific and therefore not
 specified. In particular, an implementation may be unable to guarantee
 that it deletes the expected file when replaced by an attacker while the
 file is open. Consequently, security sensitive applications should take
 care when using this option.
  For security reasons, this option may imply the LinkOption.NOFOLLOW_LINKS option. In other words, if the option is present
 when opening an existing file that is a symbolic link then it may fail
 (by throwing IOException).
public static final StandardOpenOption SPARSE
CREATE_NEW option then this
 option provides a hint that the new file will be sparse. The
 option is ignored when the file system does not support the creation of
 sparse files.public static final StandardOpenOption SYNC
public static final StandardOpenOption DSYNC
public static StandardOpenOption[] values()
for (StandardOpenOption c : StandardOpenOption.values()) System.out.println(c);
public static StandardOpenOption valueOf(String name)
name - the name of the enum constant to be returned.IllegalArgumentException - if this enum type has no constant with the specified nameNullPointerException - if the argument is null Submit a bug or feature 
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