# Use Files.newBufferedReader
# Description
Java 7 introduced the Files (opens new window) class that contains convenience methods for operating on files.
This rule makes use of the Files.newBufferedReader (opens new window) method for initializing BufferedReader (opens new window) objects to read text files in an efficient non-blocking manner.
# Benefits
Achieve better performance by using non-blocking I/O operations offered by the java.nio package.
# Tags
# Code Changes
# Creating the BufferedReader from a new FileReader
Pre
String location = "path/to/file";
BufferedReader br = new BufferedReader(new FileReader(location));
Post
String location = "path/to/file";
BufferedReader br = Files.newBufferedReader(Paths.get(location), Charset.defaultCharset());
# Creating the FileReader from a new File
Pre
String location = "path/to/file";
BufferedReader br = new BufferedReader(new FileReader(new File(location)));
Post
String location = "path/to/file";
BufferedReader br = Files.newBufferedReader(Paths.get(location), Charset.defaultCharset());
# Declaring the Resources on a Try-With-Resource Statement
Pre
try (FileReader reader = new FileReader(new File("path/to/file"));
BufferedReader br = new BufferedReader(reader)) {
//...
} catch (IOException e) {}
Post
try (BufferedReader br = Files.newBufferedReader(Paths.get("path/to/file"), Charset.defaultCharset())) {
//...
} catch (IOException e) {}
# Providing the Charset Manually (Since Java 11)
Pre
String location = "path/to/file";
BufferedReader br = new BufferedReader(new FileReader(location, StandardCharsets.UTF_8));
Post
String location = "path/to/file";
BufferedReader br = Files.newBufferedReader(Paths.get(location), StandardCharsets.UTF_8);
You Want To Have Those Changes Done Automatically?
The automatic application of this rule is supported in the following jSparrow version:
# Properties
| Property | Value |
|---|---|
| Rule ID | UseFilesBufferedReader |
| First seen in jSparrow version | 3.21.0 |
| Minimum Java version | 7 |
| Remediation cost | 5 min |
| Links |