Java program to read and display files

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?

One Response to “Java program to read and display files”

Leave a Reply