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Chapter 7. Arrays and ArrayLists > Using Command-Line Arguments

7.12. Using Command-Line Arguments

It’s possible to pass arguments from the command line (these are known as command-line arguments) to an application by including a parameter of type String[] (i.e., an array of Strings) in the parameter list of main, exactly as we’ve done in every application in the book. 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 file names 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 to calculate the values of the array’s remaining elements. The command


  

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