public static void main(String[] args) {
        In in;
        String urlName = "http://introcs.cs.princeton.edu/stdlib/InTest.txt";

        // read from a URL
        System.out.println("readAll() from URL " + urlName);
        System.out.println("---------------------------------------------------------------------------");
        try {
            in = new In(urlName);
            System.out.println(in.readAll());
        }
        catch (Exception e) { System.out.println(e); }
        System.out.println();

        // read one line at a time from URL
        System.out.println("readLine() from URL " + urlName);
        System.out.println("---------------------------------------------------------------------------");
        try {
            in = new In(urlName);
            while (!in.isEmpty()) {
                String s = in.readLine();
                System.out.println(s);
            }
        }
        catch (Exception e) { System.out.println(e); }
        System.out.println();

        // read one string at a time from URL
        System.out.println("readString() from URL " + urlName);
        System.out.println("---------------------------------------------------------------------------");
        try {
            in = new In(urlName);
            while (!in.isEmpty()) {
                String s = in.readString();
                System.out.println(s);
            }
        }
        catch (Exception e) { System.out.println(e); }
        System.out.println();


        // read one line at a time from file in current directory
        System.out.println("readLine() from current directory");
        System.out.println("---------------------------------------------------------------------------");
        try {
            in = new In("./InTest.txt");
            while (!in.isEmpty()) {
                String s = in.readLine();
                System.out.println(s);
            }
        }
        catch (Exception e) { System.out.println(e); }
        System.out.println();


        // read one line at a time from file using relative path
        System.out.println("readLine() from relative path");
        System.out.println("---------------------------------------------------------------------------");
        try {
            in = new In("../stdlib/InTest.txt");
            while (!in.isEmpty()) {
                String s = in.readLine();
                System.out.println(s);
            }
        }
        catch (Exception e) { System.out.println(e); }
        System.out.println();

        // read one char at a time
        System.out.println("readChar() from file");
        System.out.println("---------------------------------------------------------------------------");
        try {
            in = new In("InTest.txt");
            while (!in.isEmpty()) {
                char c = in.readChar();
                System.out.print(c);
            }
        }
        catch (Exception e) { System.out.println(e); }
        System.out.println();
        System.out.println();

        // read one line at a time from absolute OS X / Linux path
        System.out.println("readLine() from absolute OS X / Linux path");
        System.out.println("---------------------------------------------------------------------------");
        in = new In("/n/fs/introcs/www/java/stdlib/InTest.txt");
        try {
            while (!in.isEmpty()) {
                String s = in.readLine();
                System.out.println(s);
            }
        }
        catch (Exception e) { System.out.println(e); }
        System.out.println();


        // read one line at a time from absolute Windows path
        System.out.println("readLine() from absolute Windows path");
        System.out.println("---------------------------------------------------------------------------");
        try {
            in = new In("G:\\www\\introcs\\stdlib\\InTest.txt");
            while (!in.isEmpty()) {
                String s = in.readLine();
                System.out.println(s);
            }
            System.out.println();
        }
        catch (Exception e) { System.out.println(e); }
        System.out.println();

    }