Input/Output problem

[Jdinesh Tiwari]

Hi All
This program to take input from keyboard and display on console

import java.io.*;
public class KBInputName {
	public static void main (String[] args) {
		String s;
		// Create a buffered reader to read
		// each line from the keyboard.
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		System.out.println("Unix: Type ctrl-d to exit." +
			"\nWindows: Type ctrl-z to exit");
			System.out.println("Enter your name:");
		try {
			// Read each input line and echo it
			s = br.readLine();
			while ( s != null ) {
				System.out.println("My name is : " + s);
				//s = br.readLine();
			}
            /*while ( (s = br.readLine()) != null ) {
	            System.out.println("Read: " + s);
            }*/

    		// Close the buffered reader.
			br.close();
   		} catch (IOException e) { // Catch any exceptions.
			e.printStackTrace();
		}
	}
}

but when i comment line of code given below i.e. line no.16 in the program
Than the output screen doesn`t get hold it keeps on running why it is so? please explain

//s = br.readLine();

[Winston Gutkowski]

Jdinesh Tiwari wrote:but when i comment line of code given below i.e. line no.16 in the program
Than the output screen doesn`t get hold it keeps on running why it is so? please explain

Because that's what you told it to do.

What do you think is going to happen with
while ( s != null )
Is s going to suddenly "become" null just because you displayed it?

Winston