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nio.2 in java 7: a comprehensive tutorial with code examples

nio.2 (new input/output api) introduced in java 7 dramatically enhances file handling capabilities, offering improved performance, scalability, and ease of use compared to the older `java.io` package. this tutorial will delve into the core concepts of nio.2, providing detailed explanations and practical code examples using java 7.

*key concepts of nio.2:*

*asynchronous i/o:* the most significant feature, allowing non-blocking operations. your program can initiate a file operation (read or write) and continue processing other tasks while the operation completes in the background.
*path api:* provides a unified way to represent files and directories, replacing the cumbersome `java.io.file` class.
*file attributes:* provides access to a wide range of file metadata like creation time, last access time, file size, posix permissions, and more.
*watch service:* enables your application to monitor directories for file system events like file creation, deletion, and modification.
*improved error handling:* more informative and precise exceptions make debugging file operations easier.

*1. the path api: representing files and directories*

the `java.nio.file.path` interface represents a file or directory within the file system. it provides a more flexible and type-safe alternative to the `java.io.file` class.

*creating a path:*

you can create a `path` object in several ways using the `java.nio.file.paths` utility class:

*from a string:*



*from a uri (uniform resource identifier):*



*path manipulation:*

the `path` interface provides methods for manipulating paths:

`getname(int index)`: returns the name element at the specified index.
`getnamecount()`: returns the number of name elements in the path.
`getparent()`: returns the parent path, or `null` if the path has no parent.
`getroot()`: returns the root component of the path, or `nu ...

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Nio 2 tutorial
Java 7
file I/O
asynchronous file operations
path class
directory stream
file visitor
symbolic links
file attributes
watch service
exception handling
buffer management
character encoding
input/output streams
performance optimization