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Java Path Class

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In this section we will discuss all the aspect of Path class of Java.

Java Path Class

In this section we will discuss all the aspect of Path class of Java.

In Java, Path class is added from the SE 7 release. Java 7 has added the java.nio.file package (new file IO). Prior to JDK7/JRE7 many of the methods doesn't throw the exceptions on the encountered of an error and a developer could not understand that what happened, so a new package is introduced in Java 7 for the file system to let the developer understand, what is happening on the encounter of an error. The Path represents a path in the file system object of which contains the name of a file, directory list to create path, check path, locate path and manipulate files. The Path is system dependent, i.e. path of file system of one Operating System is different from the file system of another Operating System.

How to create Path

There are various ways to create a Path object these are as follows :

Path path = Paths.get("/user/abc.txt");
Path path1 = Paths.get(args[0]);
Path path2 = FileSystems.getDefault().getPath("/user/abc.txt");
Path path3 = Paths.get(System.getProperty("user.home"), "text", "abc.txt");

How to Get the Path Information

Name elements of Path are stored in a sequence i.e. the top level element of directory structure is situated at the index 0 (zero) and the lowest level element of directory structure is situated at the index (n-1), 'n' is the number of name elements. There are various of methods are available in Path which are used to get the information of the existing file. These are as follows :

Method Name Description
getFileName() This method is used to get the name of file or directory of the current path.
Syntax : Path getFileName()
getName(int index) This method is used to get the name of the specified index.
Syntax : Path getName(int index)
getNameCount() This method is used to get the number of element in the specified path.
Syntax : int getNameCount()
getParent() This method is used to get the parent directory.
Syntax : Path getParent()
getRoot() This method is used to get the root of the directory.
Syntax : Path getRoot()

Except these above methods there are some more useful methods in Path.

Method Name Description
endsWith(Path other) This method  tests whether the current path is ends with the specified path or not.
Syntax : boolean endsWith(Path other)
endsWith(String other) This method tests whether the current path is ends with the specified path made up with the specified string path name or not.
Syntax :boolean endsWith(String other)
equals(Object other) This method compares the current path with the given object that whether they are equal or not.
Syntax : boolean equals(Object other)
isAbsolute() This method specifies that whether the current path is absolute or not.
Syntax : boolean isAbsolute()
iterator() This method gives an iterator to iterate over the name element of the current path.
Syntax : Iterator iterator()
resolve(Path other) This method is used to join the current path with given path.
Syntax : Path resolve(Path other)
resolve(String other) This method converted the specified string to a path and then joins this path with the current path.
Syntax : Path resolve(String other)
startsWith(Path other) This method tests whether the current path is started with the specified path or not.
Syntax : boolean startsWith(Path other)
startsWith(String other) This method tests whether the current path is started with the specified path made up with the specifie string path or not.
Syntax : boolean startsWith(String other)
subpath(int beginIndex, int endIndex) This method is used to get the relative path from the current path, the returned path is the subsequence of the current path returned from the specified index.
Syntax : Path subpath(int beginIndex, int endIndex)
toString() This method is used to get the path as a String.
Syntax : String toString()
toFile() This method is used to get the File object from the current path.
Syntax : File toFile()

 

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Posted on: November 9, 2012

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