1:	import java.io.FileReader;
2:	import java.io.LineNumberReader;
3:	
4:	public class Test {
5:	   public static void main(String args[]) {
6:	      if(args.length < 1) {
7:	         System.err.println("Usage: " + "java Test filename");
8:	         System.exit(1);
9:	      }
10:	      new Test(args[0]);
11:	   }
12:	   public Test(String filename) {
13:	      try {
14:	         FileReader       frdr = new FileReader(filename);
15:	         LineNumberReader lrdr = new LineNumberReader(frdr);
16:	
17:	         for(String line; (line = lrdr.readLine()) != null;) {
18:	            System.out.print(lrdr.getLineNumber() + ":\t");
19:	            printLine(line);
20:	         }
21:	      }
22:	      catch(java.io.FileNotFoundException fnfx) {
23:	         fnfx.printStackTrace();
24:	      }
25:	      catch(java.io.IOException iox) {
26:	         iox.printStackTrace();
27:	      }
28:	   }
29:	   private void printLine(String s) {
30:	      for(int c, i=0; i < s.length(); ++i) {
31:	         c = s.charAt(i);
32:	
33:	         if(c == '\t') System.out.print("   ");
34:	         else          System.out.print((char)c);
35:	      }
36:	      System.out.println();
37:	   }
38:	}