Write a Java program that reads a file and displays the file on the screen, with a line number before each line.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 | import java.io.*; class linenum { public static void main(String[] args)throws IOException { FileInputStream fil; LineNumberInputStream line; int i; try { fil=new FileInputStream(args[0]); line=new LineNumberInputStream(fil); } catch(FileNotFoundException e) { System.out.println("No such file found"); return; } do { i=line.read(); if(i=='\n') { System.out.println(); System.out.print(line.getLineNumber()+" "); } else System.out.print((char)i); }while(i!=-1); fil.close(); line.close(); } } |
Output:
Demo.java
class Demo
1 {
2 public static void main(java Demo beta gamma delta)
3 {
4 int n = 1 ;
5 System.out.println(“The word is ” + args[ n ] );
6 }
7 }
8?
