Java™ How To Program (Early Objects), Tenth Edition

7.14 Using Command-Line Arguments

It’s possible to pass arguments from the command line to an application via method main’s String[] parameter, which receives an array of Strings. By convention, this parameter is named args. When an application is executed using the java command, Java passes the command-line arguments that appear after the class name in the java command to the application’s main method as Strings in the array args. The number of command-line arguments is obtained by accessing the array’s length attribute. Common uses of command-line arguments include passing options and filenames to applications.

Our next example uses command-line arguments to determine the size of an array, the value of its first element and the increment used ...