https://github.com/andrewjbateman/java-nio-files
:clipboard: Java code to access data in files using NIO File classes
https://github.com/andrewjbateman/java-nio-files
filesystem intellij-idea java java-11 nio udemy-tutorial
Last synced: 4 months ago
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:clipboard: Java code to access data in files using NIO File classes
- Host: GitHub
- URL: https://github.com/andrewjbateman/java-nio-files
- Owner: AndrewJBateman
- Created: 2021-05-06T16:56:33.000Z (about 4 years ago)
- Default Branch: main
- Last Pushed: 2021-05-12T13:34:42.000Z (about 4 years ago)
- Last Synced: 2024-12-27T02:45:04.136Z (6 months ago)
- Topics: filesystem, intellij-idea, java, java-11, nio, udemy-tutorial
- Language: Java
- Homepage:
- Size: 16.6 KB
- Stars: 0
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# :zap:Java NIO
* Java coding project for a Java Programming Masterclass see [:clap: Inspiration](#clap-inspiration) below
*** Note: to open web links in a new window use: _ctrl+click on link_**
## :page_facing_up: Table of contents
* [:zap: Angular Material Table](#zap-angular-material-table)
* [:page_facing_up: Table of contents](#page_facing_up-table-of-contents)
* [:books: General info](#books-general-info)
* [:camera: Screenshots](#camera-screenshots)
* [:signal_strength: Technologies](#signal_strength-technologies)
* [:floppy_disk: Setup](#floppy_disk-setup)
* [:computer: Code Examples](#computer-code-examples)
* [:cool: Features](#cool-features)
* [:clipboard: Status & To-Do List](#clipboard-status--to-do-list)
* [:clap: Inspiration](#clap-inspiration)
* [:envelope: Contact](#envelope-contact)
## :books: General info
* [Java.nio](https://docs.oracle.com/javase/8/docs/api/java/nio/package-summary.html) used to define buffers - containers for data.
* [Java.nio FileSystem class](https://docs.oracle.com/javase/7/docs/api/java/nio/file/FileSystem.html) provides an interface to a file system.
* [Java.nio IntBuffer class](https://docs.oracle.com/javase/9/docs/api/java/nio/IntBuffer.html) extends Buffer, an int buffer
* [Java.nio flip()](https://www.geeksforgeeks.org/buffer-flip-methods-in-java-with-examples/) to flip buffer. Use after read and before write operations
* [Java Pipe class](https://docs.oracle.com/javase/7/docs/api/java/nio/channels/Pipe.html) 2 channels that implement a unidirectional pipe, a writable sink channel and a readable source channel.
* [Java lambda expression](https://docs.oracle.com/javase/tutorial/java/javaOO/lambdaexpressions.html) a single method class - to take in parameters and return a value.
## :camera: Screenshots
* Not applicable for this project
## :signal_strength: Technologies
* [Java v11](https://www.java.com/en/)
## :floppy_disk: Setup
* Open folder in an IDE such as IntelliJ.
## :computer: Code Examples
* class to create a data file and write data to it. flip() method used to flip the buffer so buffer trimmed to current position then position changed to zero.
```java
public class Main {
public static void main(String[] args) {
try(FileOutputStream binFile = new FileOutputStream("data.dat");
FileChannel binChannel = binFile.getChannel()) {
byte[] outputBytes = "Hello World".getBytes();
ByteBuffer buffer = ByteBuffer.wrap(outputBytes);
int numBytes = binChannel.write(buffer);
System.out.println("numBytes written was: " + numBytes);
ByteBuffer intBuffer = ByteBuffer.allocate(Integer.BYTES);
intBuffer.putInt(245);
intBuffer.flip();
numBytes = binChannel.write(intBuffer);
System.out.println("numBytes written was: " + numBytes);
intBuffer.flip();
intBuffer.putInt(-98765);
intBuffer.flip();
numBytes = binChannel.write(intBuffer);
System.out.println("numBytes written was: " + numBytes);
} catch(IOException e) {
e.printStackTrace();
}
}
}
```
## :cool: Features
* tba
## :clipboard: Status & To-Do List
* Status: Working tutorial code Section 14-247 completed.
* To-Do: Complete tutorial
## :clap: Inspiration
* [Udemy: Java Programming Masterclass for Software Developers](https://www.udemy.com/course/java-the-complete-java-developer-course/learn/lecture/3561816#overview)
## :envelope: Contact
* Repo created by [ABateman](https://www.andrewbateman.org), email: [email protected]