Command Line Argument

Author: Ravi Poswal

Command line arguments are values passed to a Java program at the time of execution through the command line. These values are stored in the String[] args parameter of the main() method.

Code Example

class Test {
    public static void main(String[] args) {
        int a = Integer.parseInt(args[0]);
        int b = Integer.parseInt(args[1]);
        System.out.println("Sum: " + (a + b));
    }
}

Code Example

class Test {
    public static void main(String... args) {
        System.out.println("Number of arguments: " + args.length);
    }
}

FAQs

1. String[] args uses a traditional array of strings, while String... args uses variable-length arguments (varargs).

2. String[] args follows standard array syntax, whereas String... args uses special varargs syntax.

3. String[] args is fixed as an array, while String... args is more flexible and can accept any number of arguments.

4. Internally, both String[] args and String... args are treated as arrays.

5. String[] args is the standard and most commonly used form in the main() method.

6. String... args is also valid but used less frequently.

7. String... args is cleaner and more readable for variable inputs, while String[] args is slightly less flexible.

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