Many times we need to deal with the UTF-8 encoded file in our application. This may be due to localization needs or simply processing user input out of some requirements.
Even some data sources may provide data in UTF-8 format only. In this Java tutorial, we will learn two very simple examples of reading and writing UTF-8 content from a file.
1. Writing UTF-8 Encoded Data into a File
The given below is a Java example to demonstrate how to write “UTF-8” encoded data into a file. It uses the character encoding “UTF-8” while creating the OutputStreamWriter.
File file = new File("c:\\temp\\test.txt");
try (Writer out = new BufferedWriter(new OutputStreamWriter(
new FileOutputStream(file), StandardCharsets.UTF_8))) {
out.append("Howtodoinjava.com")
.append("\r\n")
.append("UTF-8 Demo")
.append("\r\n")
.append("क्षेत्रफल = लंबाई * चौड़ाई")
.append("\r\n");
out.flush();
} catch (Exception e) {
System.out.println(e.getMessage());
}We need to enable the Eclipse IDE for support of the UTF-8 character set before running the example in Eclipse. By default, it is disabled. If you wish to enable the UTF-8 support in eclipse, we will get the necessary help for my previous post:
Read: How to compile and run a java program written in another language
2. Reading UTF-8 Encoded Data from a File
We need to pass StandardCharsets.UTF_8 into the InputStreamReader constructor to read data from a UTF-8 encoded file.
File file = new File("c:\\temp\\test.txt");
try (BufferedReader in = new BufferedReader(
new InputStreamReader(new FileInputStream(file), "UTF8"))) {
String str;
while ((str = in.readLine()) != null) {
System.out.println(str);
}
} catch (Exception e) {
System.out.println(e.getMessage());
}Program Output:
Howtodoinjava.com
UTF-8 Demo
क्षेत्रफल = लंबाई * चौड़ाईHappy Learning !!