Java Command Line Argument

Command-line arguments are passed to the main() method when we want to pass information into a program during runtime.

It is the information that directly follows the program’s name on the command line when it is executed.

How to use a command-line argument in a Java program?

It is quite easy to use a command-line interface in a Java program. They are stored as strings in a “String” array passed to the "args" parameter of "main()". Let’s understand it with a simple program:

 Class CommandLineDemo
 {
                 Public static void main(String args)
                 {
                                 System .out.println("First argument is:"+ args[0]);
                 }
 } 

Write the below command in Command Line Interface

To compile- javac CommandLineDemo.java

Run by- java CommandLineDemo Tutorialandexample.com

Output:

                Tutorialandexample.com

Note: All command-line arguments can be passed as a string. We must convert numeric values into their internal form manually.

An example to illustrate the working of command-line arguments.

 Class Demo
 {
                 Public static void main(String args[])
                 {
                                 for(inti=0;i



Write the below codes in Command Prompt



 javac Demo.java
 java Demo Ankit Kumar Shahi
 Output:
 args[0]:Ankit
 args[1]:Kumar
 args[2]:Shahi