package example8_3_FileOpening;

import java.io.*;
import java.nio.charset.Charset;

public class OpeningTextFileExamples {
    public static void main(String[] args) {
        // Ways to call a method on a newly-constructed object

        // 1
        new OpeningTextFileExamples().example();

//        // 2
//        OpeningTextFileExamples example2 = new OpeningTextFileExamples()
//        example2.example();
    }

    public void example() {
        // Ways to open a text file
        // All of them throw a FileNotFoundException from the constructor that creates the FileReader or
        // FileInputStream.
        try {
            // 1
            File file1 = new File("D:\\MyDocs\\Desktop\\Example.txt");
            Reader reader1 = new FileReader(file1);

            // 2
            Reader reader2 = new FileReader("D:\\MyDocs\\Desktop\\Example.txt");

            // 3
            BufferedReader reader3 = new BufferedReader(new FileReader("D:\\MyDocs\\Desktop\\Example.txt"));
//            reader3.readeLine(); // BufferedReader provides this.

            // 4
            String filename4 = "D:\\MyDocs\\Desktop\\Example.txt";
            BufferedReader reader4 = new BufferedReader(
                    new FileReader(filename4));

            // 5
            String filename5 = "D:\\MyDocs\\Desktop\\Example.txt";
            Reader reader5 = new InputStreamReader(
                    new FileInputStream(filename5),
                             Charset.forName("utf-16"));

            // 6
            String filename6 = "D:\\MyDocs\\Desktop\\Example.txt";
            BufferedReader reader6 = new BufferedReader(new InputStreamReader(
                    new FileInputStream(filename6), Charset.forName("utf-16")  ));

            // 7
            String filename7 = "D:\\MyDocs\\Desktop\\Example.txt";
            File file7 = new File(filename7);
            InputStream inputStream7 = new FileInputStream(file7);
            Reader reader7 = new InputStreamReader(inputStream7, Charset.forName("utf-16"));
            BufferedReader bufferedReader7 = new BufferedReader(reader7);

            // 8
            String filename8 = "D:\\MyDocs\\Desktop\\Example.txt";
            BufferedReader bufferedReader8 = myOpenFile8(filename8);

            // 9
            // Make your own!  This list is far from exhaustive!
        } catch (FileNotFoundException e) {
            System.err.println("Warning: Could not find file.");
        }
    }

    private static BufferedReader myOpenFile8(String filename) throws FileNotFoundException {
        File file7 = new File(filename);
        InputStream inputStream7 = new FileInputStream(file7);
        Reader reader7 = new InputStreamReader(inputStream7, Charset.forName("utf-16"));
        // 8.1
        return new BufferedReader(reader7);

        // 8.2
//        BufferedReader bufferedReader7 = new BufferedReader(reader7);
//        return bufferedReader7;
    }
}