Assuming there is a compiled java class named HelloWorld with a static method named main that accepts an Array of String

Hey Dongji,

Array indices start at zero. This is the basic practice across most, if not all, programming languages. So, if you had an array of Strings with two elements, the first element would be 0 and the second element would be 1, and so on.

For your question in specific, the second element of your String array appears to be 'Skywalker'.

I see how this can be confusing but let's take a look at this in practice:

String[] example = new String[2]; //This creates a new array of Strings with two elements
example[0] = Luke; //This sets the first element of the array to hold the String 'Luke'
example[1] = Skywalker; //This sets the second element of the array to hold the String 'Skywalker'

And you follow this format for creating arrays of integers, doubles, booleans, etc.

Hope this helps a bit.

Best,

Jacob

You have the part that invokes the program:

java HelloWorld

which leaves

Luke Skywalker

As the arguments. Since they're passed in as an array, and arrays are zero indexed you have:

args[0] = "Luke"
args[1] = "Skywalker"