What does it mean when it says "Index 0 out of bounds for length 0"

[surreal pelican]

I have this java assignment I have to reverse-engineer and when I go to run it for the first time i'm unsure of how to solve the first issue that pops up, Can anyone help explain how it's out of bounds at 0?

[alpine hemlock]

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[still rose]

It means the args array is empty

Basically you start counting at zero

If array is of length 1, the max index is 0, length 2 - index 1, etc.

if an array is empty, then it will throw an exception, because index 0 does not exist

basically you will want to add a check if array has more than 0 elements

So

if (args.length > 0) {
  StackAITester maze = new StackAITester(args[0]);
  maze.walkBoard();
}

[surreal pelican]

gotya