ShowFile.java

/* Display a text file.
To use this program, specify the name of the file that you want to see.
For example, to see a file called TEST.TXT, use the following command line.
java ShowFile TEST.TXT
*/
import java.io.*;

class ShowFile {
    public static void main(String[] args)
    {
        int i;
        FileInputStream fin;
        // First make sure that a file has been specified.
        if (args.length != 1) {
            System.out.println("Usage: ShowFile File");
            return;
        }

        try {
            fin = new FileInputStream(args[0]);
        } catch(FileNotFoundException exc) {
            System.out.println("File Not Found");
            return;
        }

        try {
            // Read bytes until EOF is encountered.
            do {
                i = fin.read();
                if (i != -1) System.out.print((char) i);
            } while (i != -1);
        } catch(IOException exc) {
            System.out.println("Error reading file.");
        }

        try {
            fin.close();
        } catch(IOException exc) {
            System.out.println("Error closing file.");
        }
    }
}