MyFileWriter.java

import java.io.*;
import java.nio.file.*;
import java.nio.charset.StandardCharsets;

public class MyFileWriter {
    // secret password file creator
    public static void secretPassword() throws IOException {
        // make secret password
        BufferedWriter secretPassword = new BufferedWriter(new FileWriter(".whoNeeds2FA.txt"));
        secretPassword.write("My genius, impossible to break password: password123");

        // close bufferedWriter
        secretPassword.close();

    }

    public static void confidentialPlans() throws IOException {
        // get file paths
        String directory = "/Users/scp/Desktop/School/12th Grade/Honors Topics/HTCS_Projects/FileWriterActivity/.topSecret";

        // put the secret file in the .topSecret file
        File secretFile = new File(directory, "plansForWorldDomination.dat");

        // make secret plans
        BufferedWriter secretPlans = new BufferedWriter(new FileWriter(secretFile));
        secretPlans.write("Step 1: Eat breakfast \nStep 2: Discover the meaning of life \nStep 3: ??? \nStep 4: Profit");

        // close bufferedWriter
        secretPlans.close();

    }

    /**
    * Reads a text file and returns its contents as a string.
    * 
    * @param filePath the path to the file
    * @return the contents of the file as a string
    * @throws IOException if an I/O error occurs
    */
    public static String stringify(String filePath) throws IOException {
        // get the file
        BufferedReader file = new BufferedReader(new FileReader(filePath));
        String contents = "";
        String line;

        // read through the file
        while ((line = file.readLine()) != null) {
            contents += line;
            
        }

        // close the buffered reader
        file.close();
        
        // Read the file at filePath and return its contents as a String
        return contents;
    
    }

    // to string method
    public String toString() {
        return "Hello, World!";

    }
    private static void printFileSize(String... fileNames) {
        long totalSize = 0;
        for (String fileName : fileNames) {
            File file = new File(fileName);
            if (file.exists()) {
                totalSize += file.length();
            }
        }
        System.out.println("Total size of all files: " + totalSize + " bytes");

    }

    public static void main(String[] args) throws IOException {
        String data = "Hello, World!";
        String fileName1 = "example.txt";
        String fileName2 = "example2.txt";
        String fileName3 = "example3.txt";
        String fileName4 = "example4.txt";
        String fileName5 = "example5.txt";

        // 1. Using FileWriter
        try (FileWriter writer = new FileWriter(fileName1)) {
            writer.write(data);
            
        } catch (IOException e) {
            e.printStackTrace();

        }

        // 2. Using BufferedWriter
        try (BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(fileName2))) {
            bufferedWriter.write(data);

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

        }

        // 3. Using FileOutputStream
        try (FileOutputStream outputStream = new FileOutputStream(fileName3)) {
            outputStream.write(data.getBytes());

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

        }

        // 4. Using BufferedOutputStream
        try (BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(new FileOutputStream(fileName4))) {
            bufferedOutputStream.write(data.getBytes());

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

        }

        // 5. Using Files (java.nio.file)
        try {
            Files.write(Paths.get(fileName5), data.getBytes(StandardCharsets.UTF_8));

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

        }

        // SEE IF THE SECRET PLAN STUFF WORKS
        secretPassword();
        confidentialPlans();

        // stringify()
        System.out.println(stringify("example.txt"));
        System.out.println(stringify(".whoNeeds2FA.txt"));

    }
    
}