Reading command Line Input in JAVA

Hi,

Developers migrating from c++ to java are first think of how

to pass command line input to java application or how to read command

line input in JAVA.

I am also worried on my early days of learning java.

So friends here I have some example to do so.

We can use BufferedReader class for that.

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import java.io.*;

public class ReadString

{

          public static void main(String[] args)

          {

                   //  prompt the user to enter their name

                   System.out.print("Enter your name: ");

                   //  open up standard input

                   BufferedReader br = new BufferedReader(new                

                                                 InputStreamReader(System.in));

                   String userName = null;

                   //  read the username from the command-line

                   try

                   {

                             userName = br.readLine();

                   }

                   catch (Exception e)

                   {

                             System.out.println(e);

                   }

                   System.out.println("UserName =  " + userName);

          }

}

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Java 5.0 gives a new feature for reading inputs.

They launch java.uti.Scanner class, it gives more flexibility for reading

a input.

You can read from any file or you can search by a particular pattern.

import java.util.Scanner;

public class InputTest

{

          public static void main(String as[])

          {

                   String name = "";

                   int age = 0;

                   Scanner sc = new Scanner(System.in);

                   name = sc.nextLine();

                   age = sc.nextInt();

                   sc.close();

                   System.out.println("Name :-" + name);

                   System.out.println("Age :-" + age);

          }

}

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