package example8_3_FileOpening;

import java.io.*;

public class Example {
    public static void main(String[] args) {
        File file = new File("D:\\MyDocs\\Desktop\\Example.txt");
        // Solution to in-class exercise #1.
        boolean isFile = file.isFile();
        System.out.println("Is it a file? "+isFile); // Should be true -- it's a file, not a directory.
        //FileReader -- reads text

        InputStream inputStream = null;
        try {
            inputStream = new FileInputStream(file);
        } catch (FileNotFoundException e) {
            System.err.println("Warning: Could not fine file:"+file.getAbsolutePath());
        }

        int myInt = 0;  // 4 bytes
//        Integer.MAX_VALUE;
//        Integer.MIN_VALUE;
        char myChar = (char) myInt; // 2 bytes (utf-16 character)
        byte myRealByte = (byte) myInt; // 1 byte (8 bits)

        try {
            while(-1 != (myInt = inputStream.read())){
                System.out.println("byte: "+myInt+" "+
                    Integer.toHexString(myInt)+" "+(char)myInt);
            }
        } catch (IOException e) {
            System.err.println("Warning: Error while attempting" +
                    " to read byte from file!");
        }

        // In-class exercise #2: Shown on student laptop.
    }

    /**
     * Example of reading a directory
     */
    private static void outOfWay() {

        File dir = new File("D:\\MyDocs\\Desktop\\");
        File[] files = dir.listFiles();
//        for(File f: files) {
//            System.out.println("Filename: "+f.getName());
//        }
        for(int i =0; i< files.length; i++) {
            File f = files[i];
            System.out.println("Filename: "+f.getName());
        }
    }
}