Java Pocket Guide Instant Help for Java Programmers, 4th Edition by Unknown

Author:Unknown
Language: eng
Format: epub

CHAPTER 13

New I/O API (NIO.2)

NIO.2 was introduced with JDK 7 to provide enhanced file I/O

support and access to the default filesystem. NIO.2 is supported

by the java.nio.file and java.nio.file.attribute packages.

The NIO.2 API is also known as JSR 203: More New I/O APIs

for the Java Platform. Popular interfaces that are used from the

API are Path, PathMatcher, FileVisitor, and WatchService.

Popular classes that are used from the API are Paths and Files.

The Path Interface

The Path interface can be used to operate on file and directory

paths. This class is an upgraded version of the java.io.File

class. The following code demonstrates the use of some of the

methods of the Path interface and the Paths class for acquiring

information:

Path p = Paths.get("\\opt\\jpgTools\\README.txt");

System.out.println(p.getParent()); // \opt\jpgTools

System.out.println(p.getRoot()); // \

System.out.println(p.getNameCount()); // 3

System.out.println(p.getName(0)); // opt

System.out.println(p.getName(1)); // jpgTools

System.out.println(p.getFileName()); // README.txt

System.out.println(p.toString()); // The full path

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