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Android Build a Simple Android App (2014) Coding the Fun Facts Using an Array

Dawson Forbes
Dawson Forbes
487 Points

I always get: Bummer! java.lang.ArrayIndexOutOfBoundsException: 3 ()

I only get it in that task part and I've tried doing:

String lastSport = sports[3]; & String lastSport = sports[numberOfSports];

Both of them give them same error

Array.java
String[] sports = { "Basketball", "Baseball", "Tennis"};
String bestSport = sports[0];
int numberOfSports = sports.length;
String lastSport = sports[sports.length];

hi Dawson,

To get the last sport value from the array, you will need:

String lastSport = sports[sports.length - 1];

or

String lastSport = sports[numberOfSports - 1];

This is because arrays are zero indexed. This means that the first value is at index 0 and the last one is at 2.

cheers, Swap

1 Answer

You've shown that you understand that arrays are 0-indexed (aka the first element has an index of 0). The length of the array is indeed 3, but because it's 0-indexed, if you write sports[3], you're actually asking for the FOURTH element in the array. To get the last (third) element, you want to use index 2.

String lastSport = sports[sports.length - 1];

Of course, you could replace the index with "numberOfSports - 1" or similar.