Command-Line Arguments

• A Java application can be passed String arguments when it is executed.

• These are called commandline arguments and allow your programs to receive simple input from whomever is executing your program.

• When you execute your application, you can pass in values by adding them to the end of the java command:

   java MyFamily Pippi  

• Note: Figure out how to do this in your IDE.

• Each separate string is an argument, so if you want to pass in a phrase, (i.e. "Pippi the dog") you will need to quote it.

• In your program, the array named args has the passed-in arguments.

• (Remember static void main(String args[])?)

• To access these values in your program, you just access the array.

• The first argument is in args[0].

• Unlike Linux Shell, C, and C++, the first element in the array does not contain the name of the program.

• Here's a code snippet showing the basic idea: