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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » com.sun.midp.io.j2me.storage   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    com.sun.midp.io.j2me.storage.File File public class File (Code) Provide the methods to manage files in a device's persistant storage. Constructor Summary public   File()      Constructs a file object. public   File(SecurityToken callerSecurityToken)      Constructs a file object. Method Summary public static  String asciiFilenameToUnicode(String str)      Perform the reverse conversion of unicodeToAscii(). public synchronized  void delete(String name)      Remove a file from storage if it exists. public synchronized  boolean exists(String name)      Returns true if storage file name exists. public  long getBytesAvailableForFiles(int storageId)      Retrieves the approximate space available to grow or create new storage files. public static  String getConfigRoot(int storageId)      Returns the root to build configuration filenames including an needed file separators, abstracting difference of the file systems of development and device platforms. public static  String getStorageRoot(int storageId)      Returns the root to build storage filenames including an needed file separators, abstracting difference of the file systems of development and device platforms. public synchronized  void rename(String oldName, String newName)      Replaces the current name of storage, oldName with newName. public static  String unicodeToAsciiFilename(String str)      Convert a file name into a form that can be safely stored on an ANSI-compatible file system. Constructor Detail File public File()(Code) Constructs a file object. File public File(SecurityToken callerSecurityToken)(Code) Constructs a file object. Parameters:   callerSecurityToken - security token of the caller Method Detail asciiFilenameToUnicode public static String asciiFilenameToUnicode(String str)(Code) Perform the reverse conversion of unicodeToAscii(). Parameters:   str - a string previously returned by escape() the original string before the conversion by escape(). delete public synchronized void delete(String name) throws IOException(Code) Remove a file from storage if it exists. Parameters:   name - name of the file to delete exception:   IOException - if an error occurs during delete exists public synchronized boolean exists(String name)(Code) Returns true if storage file name exists. Parameters:   name - name of storage file true if the named storage file exists getBytesAvailableForFiles public long getBytesAvailableForFiles(int storageId)(Code) Retrieves the approximate space available to grow or create new storage files. Parameters:   storageId - ID of the storage to check for available space approximate number of free bytes in storage getConfigRoot public static String getConfigRoot(int storageId)(Code) Returns the root to build configuration filenames including an needed file separators, abstracting difference of the file systems of development and device platforms. Note the root is never null. Parameters:   storageId - ID of the storage the config root of whichshould be returned root of any configuration filename for accessing devicepersistant storage. getStorageRoot public static String getStorageRoot(int storageId)(Code) Returns the root to build storage filenames including an needed file separators, abstracting difference of the file systems of development and device platforms. Note the root is never null. Parameters:   storageId - ID of the storage the root of which should be returned root of any filename for accessing device persistantstorage. rename public synchronized void rename(String oldName, String newName) throws IOException(Code) Replaces the current name of storage, oldName with newName. Parameters:   oldName - original name of storage file Parameters:   newName - new name for storage file exception:   IOException - if an error occurs during rename unicodeToAsciiFilename public static String unicodeToAsciiFilename(String str)(Code) Convert a file name into a form that can be safely stored on an ANSI-compatible file system. All characters that are not [A-Za-z0-9] are converted into %uuuu, where uuuu is the hex representation of the character's unicode value. Note even though "_" is allowed it is converted because we use it for for internal purposes. Potential file separators are converted so the native layer does not have deal with sub-directory hierarchies. Parameters:   str - a string that may contain any character an equivalent string that contains only the "safe" characters. Methods inherited from java.lang.Object public boolean equals(Object obj)(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)