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Java program to read and display files

Friday, October 2nd, 2009

Write a Java program that reads a file and displays the file on the screen, with a line number before each line.

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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?

Avatar of Ranjith

Author Name :
Ranjith

Total : 1 Comment

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

  1. explanation of this program says:
    January 18, 2012 at 5:54 pm

    very simple to learn

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