# Use Files.newBufferedWriter
# 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.newBufferedWriter (opens new window) method for initializing BufferedWriter (opens new window) objects to write text files in an efficient non-blocking manner.
# Benefits
Achieve better performance by using non-blocking I/O operations offered by the java.nio (opens new window) package.
# Tags
# Code Changes
# Creating the BufferedWriter from a new FileWriter
Pre
String location = "path/to/file";
BufferedWriter bw = new BufferedWriter(new FileWriter(location));
Post
String location = "path/to/file";
BufferedWriter bw = Files.newBufferedWriter(Paths.get(location), Charset.defaultCharset());
# Creating the FileWriter from a new File
Pre
String location = "path/to/file";
BufferedWriter bw = new BufferedWriter(new FileWriter(new File(location)));
Post
String location = "path/to/file";
BufferedWriter bw = Files.newBufferedWriter(Paths.get(location), Charset.defaultCharset());
# Declaring the Resources on a Try-With-Resource Statement
Pre
try (FileWriter writer = new FileWriter(new File("path/to/file"));
BufferedWriter bw = new BufferedWriter(writer)) {
//...
} catch (IOException e) {}
Post
try (BufferedWriter bw = Files.newBufferedWriter(Paths.get("path/to/file"), Charset.defaultCharset())) {
// ...
} catch (IOException e) {}
# Providing the Charset Manually (Since Java 11)
Pre
String location = "path/to/file";
BufferedWriter bw = new BufferedWriter(new FileWriter(location, StandardCharsets.UTF_8));
Post
String location = "path/to/file";
BufferedWriter bw = Files.newBufferedWriter(Paths.get(location), StandardCharsets.UTF_8);
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# Properties
| Property | Value |
|---|---|
| Rule ID | UseFilesBufferedWriter |
| First seen in jSparrow version | 3.22.0 |
| Minimum Java version | 7 |
| Remediation cost | 5 min |
| Links |