Problem : Write a program that takes a name from command line and say Hello to it?

Contents

1. 1 Program :
   1. 1.1 Step 1 - Coding
   2. 1.2 Step 2 - Deployment
   3. 1.3 Step 3 - Testing
   4. 1.4 Output

Program :

 

Step 1 - Coding

Create a text file c:\sunilos\HelloName.java  and copy below contents.

/*
 *A program which take command line argument and print on command prompt.
 */

public class HelloName {
   
    public static void main(String[] args) {

        System.out.println("Hello " + args[0]);
    }
}

Step 2 - Deployment

1. Create a folder 'c:\sunilos'. 
2. Create or copy HelloName.java into 'c:\sunilos' folder.
3. Open your command prompt and go to  'c:\sunilos'
   
4. Compile HelloName.java with help of 
• javac HelloName.java command. Command will create class file in the same folder.
5. Congratulations!! your Java program is ready to serve.

Step 3 - Testing

1. Make sure you are on Command Prompt under c:\sunilos directory
   
2. Now start your  java program from command prompt with help of 
• java HelloName SunilOS command.

Output

It will display.
Hello SunilOS


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