Path and File Object Methods

Question 1

How to create a Path object?

Answer 1

Path.get(“”);

Question 2

Path method for returning a File object

Answer 2

Path.toFile();

Question 3

Path method for returning URI object

Answer 3

Path.toURI();

Question 4

Path.getPath() is a shorthand for the class?

Answer 4

java.nio.file.FileSystem.getPath()

Question 5

Medhod of File object to get Path object

Answer 5

File.getPath()

Question 6

Path method for getting the number of elements in path and a reference to each element.

Answer 6

Path.getNameCount()

Question 7

Path method for getting the element name. Returns a Path object.

Answer 7

Path.getName()

Question 8

Path method for checking if the Path object is absolute. Returns boolean.

Answer 8

Path.absolute()

Question 9

Path method for converting the relative Path object to absolute. Returns Path object

Answer 9

Path.toAbsolute();

Question 10

Path method for getting Path object representing the filename

Answer 10

Path.getFileName()

Question 11

Path method for getting Path object representing the parent path.

Answer 11

Path.getParent()

Question 12

Path method for getting the root path object.

Answer 12

Path.getPath();

Question 13

Path method which returns relative path referenced by inclusive start index and exclusive end index

Answer 13

Path.subpath(, )

Question 14

Path method for constructing a relative path from one Path object to another

Answer 14

Path.relativize();

Path path3 = Paths.get(“E:\habitat”);
Path path4 = Paths.get(“E:\sanctuary\raven”);
System.out.println(path3.relativize(path4));
System.out.println(path4.relativize(path3));

..\sanctuary\raven
....\habitat

Both has to be relative. or both has to be absolute.

Question 15

method for creating a new Path by joining the existing path to the current path

Answer 15

Path.resolve()

Question 16

There are times that the resulting Path of relativize method contains redundant path. This path method cleans up the path

Answer 16

Path.normalize()

Question 17

Path object may point to non-existent file. This method talkes a path object and returns a real Path.
object.

Converts relative path to absolute Path.
Calls normalize implicitly.

Answer 17

Path.toRealPath();

Question 18

Files method for checkin if the Path object exists.

Answer 18

File.exists();

Question 19

Files method for checking if two Path objects are the same.

Answer 19

File.isSameFile();

Question 20

Files method for creating directory. Throws exception if the directory already exists.

Answer 20

Files.createDirectory();

Question 21

Files method for creating directories. Does not throw exception if the File does not exist.

Answer 21

Files.createDirectories();

Question 22

Files method for copying files and directories . Throws IO Exception.

Answer 22

Files.copy(source Path, destination Path)

Question 23

Files contain two overloaded methods for coyping files

Answer 23

Files.copy(InputStream, Path);

Files.copy(Path, OutputStream)

Question 24

Files method for renaming file or directory

Answer 24

Files.move(sourcePath, destinationPath)

Question 25

Files method for deleting file.

Answer 25

Files.delete(Path);

Question 26

Files method for deleting files and checks if it exists

Answer 26

Files.deleteIfExists();

Question 27

Files method for reading the file contents.

Returns BufferedReader object

Answer 27

Files.newBufferedReader(Path, Charset);

Question 28

Files method for writing file

Return BufferedWriter object

Answer 28

Files.newBufferedWriter(Path, Charset);

Question 29

Files method for method which reads all of the lines of a text file and returns the results as an ordered List of String values

Answer 29

List lines = Files.readAllLines()

Question 30

Files method for checking if the Path is regular file.

Answer 30

Files.isRegularFile(Path)

Question 31

Files method for checking if the Path is a directory.

Answer 31

Files.isDirectory(Path)

Question 32

Files method for checking if it is a symbolic link

Answer 32

Files.isSymbolicLink(Path)

Question 33

FIles Method for checking if the file is Hidden

Answer 33

Files.isHidden()

Question 34

Files method for checking if the file is readable

Answer 34

Files.isReadable()

Question 35

Files method for checking if the file is executable.

Answer 35

Files.isExecutable(Path)

Question 36

Files method for checking the size

Answer 36

Files.size()

Question 37

Files method to get the last modified time.

Answer 37

FileTime ft = Files.getLastModifiedTime()

Question 38

Files method for setting the last modified time.

Answer 38

Files.setLastModifiedTime(FileTime ft)

Question 39

Files method for setting and getting the owner

Answer 39

getOwner() and setOwner(Path, UserPrincipal)
UserPrincipal owner = FileSystems.getDefault().getUserPrincipalLookupService()
.lookupPrincipalByName(“jane”);

Path path = …
UserPrincipal owner = path.getFileSystem().getUserPrincipalLookupService()
.lookupPrincipalByName(“jane”);

Question 40

Files method for getting the read only attributes of the files.

Answer 40

BasicFileAttributes bfa = Files.readAttributes(Path,Class<a>) </a>

Question 41

Files method for getting the view of attributes and allows changing of attributes.

Answer 41

BasicFileAttributeView bfav = Files.getFileAttributeView()

Question 42

Files method returns a Stream object that traverses the directory in a depth-first, lazy manner.

Answer 42

Stream sp = Files.walk(path)

Question 43

Files method for listing the contents of directory

Answer 43

Files.list()

Question 44

Files method that returns a Stream object to read content and does not suffer from this same issue. The contents of the file are read and processed lazily, which means that only a small portion of the file is stored in memory at any given time.

Answer 44

Stream lines = Files.lines(Path)