ShowFile3.java

package chapter13;

/*  This version of the ShowFile program uses a try with resources statement
    to automatically close a file after it is no longer needed.
*/

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

public class ShowFile3 {
    public static void main(String[] args) {
        int i;
        //First confirm that a file name has been specified.
        if (args.length != 1) {
            System.out.println("Usage: ShowFile3 FileName");
            return;
        }

        //The following code uses try with a resource statement to open
        //a file and then automatically close it when the try block is left

        try (FileInputStream fin = new FileInputStream(args[0])) {
            do {
                i = fin.read();
                if (i != -1) System.out.println((char) i);

            } while (i != -1);
        } catch (FileNotFoundException e) {
            System.out.println("File Not Found");
        } catch (IOException e) {
            System.out.println("An I/O Error Occurred");
        }
    }
}