Files Class writeString() Method in Java with Examples

The writeString() method of File Class in Java is used to write contents to the specified file.

Syntax:

Files.writeString(path, string, options)

Parameters: 

• path - File path with data type as Path
• string - a specified string which will enter in the file with return type String.
• options - Different options to enter the string in the file. Like append the string to the file, overwrite everything in the file with the current string, etc

Return Value: This method does not return any value.

Below are two overloaded forms of the writeString() method.

public static Path writeString​(Path path, CharSequence csq, OpenOption... options) throws IOException

public static Path writeString​(Path path, CharSequence csq, Charset cs, OpenOption... options) throws IOException

• UTF-8 charset is used to write the content to file in the first method.
• The second method does the same using the specified charset.
• How the file is opened is specified in Options.

Below is the implementation of the problem statement:

// Implementation of writeString() method in Java
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;

public class GFG {
    public static void main(String[] args)
    {
        // Initializing file Path with some conditions
        Path filePath
            = Paths.get("/home/mayur/", "temp", "gfg.txt");

        try {
            // Write content to file
            Files.writeString(filePath, "Hello from GFG !!",
                              StandardOpenOption.APPEND);

            // Verify file content
            String content = Files.readString(filePath);

            System.out.println(content);
        }
        catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Output:

Hello from GFG ! !