/*
* @(#)FileSystem.java 1.5 98/08/26
*
* Copyright 1998 by Sun Microsystems, Inc.,
* 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
* All rights reserved.
*
* This software is the confidential and proprietary information
* of Sun Microsystems, Inc. ("Confidential Information"). You
* shall not disclose such Confidential Information and shall use
* it only in accordance with the terms of the license agreement
* you entered into with Sun.
*/package java.io;
/**
* Package-private abstract class for the local filesystem abstraction.
*/abstract class FileSystem { /**
* Return the FileSystem object representing this platform's local
* filesystem.
*/
public static native FileSystem getFileSystem();
/* -- Normalization and construction -- */ /**
* Return the local filesystem's name-separator character.
*/
public abstract char getSeparator(); /**
* Return the local filesystem's path-separator character.
*/
public abstract char getPathSeparator(); /**
* Convert the given pathname string to normal form. If the string is
* already in normal form then it is simply returned.
*/
public abstract String normalize(String path); /**
* Compute the length of this pathname string's prefix. The pathname
* string must be in normal form.
*/
public abstract int prefixLength(String path); /**
* Resolve the child pathname string against the parent.
* Both strings must be in normal form, and the result
* will be in normal form.
*/
public abstract String resolve(String parent, String child); /**
* Return the parent pathname string to be used when the parent-directory
* argument in one of the two-argument File constructors is the empty
* pathname.
*/
public abstract String getDefaultParent();
/* -- Path operations -- */ /**
* Tell whether or not the given abstract pathname is absolute.
*/
public abstract boolean isAbsolute(File f); /**
* Resolve the given abstract pathname into absolute form. Invoked by the
* getAbsolutePath and getCanonicalPath methods in the File class.
*/
public abstract String resolve(File f); public abstract String canonicalize(String path) throws IOException;
/* -- Attribute accessors -- */ /* Constants for simple boolean attributes */
public static final int BA_EXISTS = 0x01;
public static final int BA_REGULAR = 0x02;
public static final int BA_DIRECTORY = 0x04;
public static final int BA_HIDDEN = 0x08; /**
* Return the simple boolean attributes for the file or directory denoted
* by the given abstract pathname, or zero if it does not exist or some
* other I/O error occurs.
*/
public abstract int getBooleanAttributes(File f); /**
* Check whether the file or directory denoted by the given abstract
* pathname may be accessed by this process. If the second argument is
* <code>false</code>, then a check for read access is made; if the second
* argument is <code>true</code>, then a check for write (not read-write)
* access is made. Return false if access is denied or an I/O error
* occurs.
*/
public abstract boolean checkAccess(File f, boolean write); /**
* Return the time at which the file or directory denoted by the given
* abstract pathname was last modified, or zero if it does not exist or
* some other I/O error occurs.
*/
public abstract long getLastModifiedTime(File f); /**
* Return the length in bytes of the file denoted by the given abstract
* pathname, or zero if it does not exist, is a directory, or some other
* I/O error occurs.
*/
public abstract long getLength(File f);
/* -- File operations -- */ /**
* Create a new empty file with the given pathname. Return
* <code>true</code> if the file was created and <code>false</code> if a
* file or directory with the given pathname already exists. Throw an
* IOException if an I/O error occurs.
*/
public abstract boolean createFileExclusively(String pathname)
throws IOException; /**
* Delete the file or directory denoted by the given abstract pathname,
* returning <code>true</code> if and only if the operation succeeds.
*/
public abstract boolean delete(File f); /**
* Arrange for the file or directory denoted by the given abstract
* pathname to be deleted when the VM exits, returning <code>true</code> if
* and only if the operation succeeds.
*/
public abstract boolean deleteOnExit(File f); /**
* List the elements of the directory denoted by the given abstract
* pathname. Return an array of strings naming the elements of the
* directory if successful; otherwise, return <code>null</code>.
*/
public abstract String[] list(File f); /**
* Create a new directory denoted by the given abstract pathname,
* returning <code>true</code> if and only if the operation succeeds.
*/
public abstract boolean createDirectory(File f); /**
* Rename the file or directory denoted by the first abstract pathname to
* the second abstract pathname, returning <code>true</code> if and only if
* the operation succeeds.
*/
public abstract boolean rename(File f1, File f2); /**
* Set the last-modified time of the file or directory denoted by the
* given abstract pathname, returning <code>true</code> if and only if the
* operation succeeds.
*/
public abstract boolean setLastModifiedTime(File f, long time); /**
* Mark the file or directory denoted by the given abstract pathname as
* read-only, returning <code>true</code> if and only if the operation
* succeeds.
*/
public abstract boolean setReadOnly(File f);
/* -- Filesystem interface -- */ /**
* List the available filesystem roots.
*/
public abstract File[] listRoots();
/* -- Basic infrastructure -- */ /**
* Compare two abstract pathnames lexicographically.
*/
public abstract int compare(File f1, File f2); /**
* Compute the hash code of an abstract pathname.
*/
public abstract int hashCode(File f);}
* @(#)FileSystem.java 1.5 98/08/26
*
* Copyright 1998 by Sun Microsystems, Inc.,
* 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
* All rights reserved.
*
* This software is the confidential and proprietary information
* of Sun Microsystems, Inc. ("Confidential Information"). You
* shall not disclose such Confidential Information and shall use
* it only in accordance with the terms of the license agreement
* you entered into with Sun.
*/package java.io;
/**
* Package-private abstract class for the local filesystem abstraction.
*/abstract class FileSystem { /**
* Return the FileSystem object representing this platform's local
* filesystem.
*/
public static native FileSystem getFileSystem();
/* -- Normalization and construction -- */ /**
* Return the local filesystem's name-separator character.
*/
public abstract char getSeparator(); /**
* Return the local filesystem's path-separator character.
*/
public abstract char getPathSeparator(); /**
* Convert the given pathname string to normal form. If the string is
* already in normal form then it is simply returned.
*/
public abstract String normalize(String path); /**
* Compute the length of this pathname string's prefix. The pathname
* string must be in normal form.
*/
public abstract int prefixLength(String path); /**
* Resolve the child pathname string against the parent.
* Both strings must be in normal form, and the result
* will be in normal form.
*/
public abstract String resolve(String parent, String child); /**
* Return the parent pathname string to be used when the parent-directory
* argument in one of the two-argument File constructors is the empty
* pathname.
*/
public abstract String getDefaultParent();
/* -- Path operations -- */ /**
* Tell whether or not the given abstract pathname is absolute.
*/
public abstract boolean isAbsolute(File f); /**
* Resolve the given abstract pathname into absolute form. Invoked by the
* getAbsolutePath and getCanonicalPath methods in the File class.
*/
public abstract String resolve(File f); public abstract String canonicalize(String path) throws IOException;
/* -- Attribute accessors -- */ /* Constants for simple boolean attributes */
public static final int BA_EXISTS = 0x01;
public static final int BA_REGULAR = 0x02;
public static final int BA_DIRECTORY = 0x04;
public static final int BA_HIDDEN = 0x08; /**
* Return the simple boolean attributes for the file or directory denoted
* by the given abstract pathname, or zero if it does not exist or some
* other I/O error occurs.
*/
public abstract int getBooleanAttributes(File f); /**
* Check whether the file or directory denoted by the given abstract
* pathname may be accessed by this process. If the second argument is
* <code>false</code>, then a check for read access is made; if the second
* argument is <code>true</code>, then a check for write (not read-write)
* access is made. Return false if access is denied or an I/O error
* occurs.
*/
public abstract boolean checkAccess(File f, boolean write); /**
* Return the time at which the file or directory denoted by the given
* abstract pathname was last modified, or zero if it does not exist or
* some other I/O error occurs.
*/
public abstract long getLastModifiedTime(File f); /**
* Return the length in bytes of the file denoted by the given abstract
* pathname, or zero if it does not exist, is a directory, or some other
* I/O error occurs.
*/
public abstract long getLength(File f);
/* -- File operations -- */ /**
* Create a new empty file with the given pathname. Return
* <code>true</code> if the file was created and <code>false</code> if a
* file or directory with the given pathname already exists. Throw an
* IOException if an I/O error occurs.
*/
public abstract boolean createFileExclusively(String pathname)
throws IOException; /**
* Delete the file or directory denoted by the given abstract pathname,
* returning <code>true</code> if and only if the operation succeeds.
*/
public abstract boolean delete(File f); /**
* Arrange for the file or directory denoted by the given abstract
* pathname to be deleted when the VM exits, returning <code>true</code> if
* and only if the operation succeeds.
*/
public abstract boolean deleteOnExit(File f); /**
* List the elements of the directory denoted by the given abstract
* pathname. Return an array of strings naming the elements of the
* directory if successful; otherwise, return <code>null</code>.
*/
public abstract String[] list(File f); /**
* Create a new directory denoted by the given abstract pathname,
* returning <code>true</code> if and only if the operation succeeds.
*/
public abstract boolean createDirectory(File f); /**
* Rename the file or directory denoted by the first abstract pathname to
* the second abstract pathname, returning <code>true</code> if and only if
* the operation succeeds.
*/
public abstract boolean rename(File f1, File f2); /**
* Set the last-modified time of the file or directory denoted by the
* given abstract pathname, returning <code>true</code> if and only if the
* operation succeeds.
*/
public abstract boolean setLastModifiedTime(File f, long time); /**
* Mark the file or directory denoted by the given abstract pathname as
* read-only, returning <code>true</code> if and only if the operation
* succeeds.
*/
public abstract boolean setReadOnly(File f);
/* -- Filesystem interface -- */ /**
* List the available filesystem roots.
*/
public abstract File[] listRoots();
/* -- Basic infrastructure -- */ /**
* Compare two abstract pathnames lexicographically.
*/
public abstract int compare(File f1, File f2); /**
* Compute the hash code of an abstract pathname.
*/
public abstract int hashCode(File f);}
我找了没有啊,
io包中带有File的类只有这么几个File
FileDescriptor
FileInputStream
FileOutputStream
FilePermission
FileReader
FileWriter
我用的是JDK1.2的帮助
请问你说的是哪个版本的
它的作用域是friendly的
给的原程序是正确的
这个没有帮助的
但是在JBuilder中可以看到源代码