What is Files.writeString in Java?

In Java 11, a new method called Files.writeString was introduced to write CharSequencea readable sequence of char values into a file.

Method signature

writeString has two overloaded methods:

Arguments

Path: Path object points to the file in which the string is to be written.
CharSequence: A sequence of characters. All the characters of the CharSequence are written on the file, including line separators. No additional characters are added.
CharSet: The charset used to encode characters into bytes. While writing the CharSequence, all characters are encoded into bytes using the specified charsetby default, UTF-8.
OpenOption: We can specify how a file should be opened using the OpenOption argument. For example, we can specify: “Open a file in Append mode, Open a file as a new file.” If we don’t send any OpenOption then:
- If the file is not present, a new file is created and written on it.
- If the file is present, old content will be overwritten.

Read more about OpenOption here.

Example

import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.Files;
import java.io.IOException;
import java.nio.file.StandardOpenOption;
import java.nio.charset.StandardCharsets;
 
public class Main {
    public static void main(String[] args) 
    {
        Path filePath = Paths.get("./test.txt");
        try {
            // write content to the files
            Files.writeString(filePath, "\nEducative.io", StandardCharsets.UTF_8, StandardOpenOption.APPEND);
            System.out.println(Files.readString(filePath));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}