package exemplodecorator;

import java.io.FileReader;
import java.io.LineNumberReader;

public class Test {
    public static void main(String args[]) {
        if(args.length < 1) {
            System.err.println("Usage: " + "java Test filename");
            System.exit(1);
        }
        new Test(args[0]);
    }
    
    public Test(String filename) {
        try {
            FileReader       frdr = new FileReader(filename);
            LineNumberReader lrdr = new LineNumberReader(frdr);
            for(String line; (line = lrdr.readLine()) != null;) {
                System.out.print(lrdr.getLineNumber() + ":\t");
                printLine(line);
            }
        } catch(java.io.FileNotFoundException fnfx) {
            fnfx.printStackTrace();
        } catch(java.io.IOException iox) {
            iox.printStackTrace();
        }
    }

    private void printLine(String s) {
        for(int c, i=0; i < s.length(); ++i) {
            c = s.charAt(i);
            if(c == '\t') System.out.print("   ");
            else          System.out.print((char)c);
        }
        System.out.println();
    }
}