Reading Command Line Arguments in Java

Java programs can receive command-line arguments. They follow the name of the program when we run it.

public class CommandLineArgs {

    public static void main(String[] args) {
        
        for (String arg : args) {
            
            System.out.println(arg);
        }
    }
}

Command-line arguments can be passed to the main() method. Output:

$ java com.sourcecodeexamples.CommandLineArgs 1 2 3 4 5
1
2
3
4
5

The main() method receives a string array of command-line arguments. Arrays are collections of data. An array is declared by a type followed by a pair of square brackets []. So the String[] args construct declares an array of strings. The args is a parameter to the main() method. The method then can work with parameters which are passed to it.

public static void main(String[] args)