Write.java

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

public class Write {
    public static void main(String[] args) throws IOException {
        try {

            String content = "This is the content to write into file\n";

            File file = new File("C:\\Users\\Shanmu\\IdeaProjects\\Email_Client\\src\\shanmu.txt");

            // if file doesnt exists, then create it
            if (!file.exists()) {
                file.createNewFile();
            }

            FileWriter fw = new FileWriter(file.getAbsoluteFile(),true);
            BufferedWriter bw = new BufferedWriter(fw);
            bw.write(content);
            bw.close();

            System.out.println("Done");

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}