Question

How many methods are available in java for file class that can be used to perform various operation

Answer 1

Answer:

The File class contains several methods for working with the path name, deleting and renaming files, creating new directories, listing the contents of a directory, and determining several common attributes of files and directories.

Methods

• boolean canExecute() : Tests whether the application can execute the file denoted by 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 the file denoted by this abstract pathname.
• int compareTo(File pathname) : Compares two abstract pathnames lexicographically.
• boolean createNewFile() : Atomically creates a new, empty file named by this abstract pathname .
• static File createTempFile(String prefix, String suffix) : Creates an empty file in the default temporary-file directory.
• boolean delete() : Deletes the file or directory denoted by this abstract pathname.
• boolean equals(Object obj) : Tests this abstract pathname for equality with the given object.
• boolean exists() : Tests whether the file or directory denoted by this abstract pathname exists.
• String getAbsolutePath() : Returns the absolute pathname string of this abstract pathname.
• long getFreeSpace() : Returns the number of unallocated bytes in the partition .
• 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.
• File getParentFile() : Returns the abstract pathname of this abstract pathname’s parent.
• String getPath() : Converts this abstract pathname into a pathname string.
• boolean isDirectory() : Tests whether the file denoted by this 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 length() : Returns the length of the file denoted by this abstract pathname.
• String[] list() : Returns an array of strings naming the files and directories in the directory .
• File[] listFiles() : Returns an array of abstract pathnames denoting the files in the directory.
• boolean mkdir() : Creates the directory named by this abstract pathname.
• boolean renameTo(File dest) : Renames the file denoted by this abstract pathname.
• boolean setExecutable(boolean executable) : A convenience method to set the owner’s execute permission.
• boolean setReadable(boolean readable) : A convenience method to set the owner’s read permission.
• boolean setReadable(boolean readable, boolean ownerOnly) : Sets the owner’s or everybody’s read permission.
• boolean setReadOnly() : Marks the file or directory named so that only read operations are allowed.
• boolean setWritable(boolean writable) : A convenience method to set the owner’s write permission.
• String toString() : Returns the pathname string of this abstract pathname.
• URI toURI() : Constructs a file URI that represents this abstract pathname.