lastElement = Iterables.getLast(iterableList);

arrayName[arrayName.length() - 1];

ArrayList<Integer> list = new ArrayList<Integer>(5); 

int last = list.get(list.size() - 1); 

firstNum = numbers[0];

lastNum = numbers[numbers.length-1];

int[] arr = new int[5]; //length of the array is 5

int val = arr[arr.length - 1]; //here variable val stores the last element of arr

int [] numbers = {1, 2, 3, 4, 5};

​

firstElement = numbers[0];

lastElement = numbers[numbers.length-1];

int last = list.get(list.size() - 1); 

firstNum = numbers.get(0);

lastNum = numbers.get(numbers.size() - 1); 

int a[]={1,2,3};

int last = a[a.length-1];

// Array of doubles

double[] array_doubles = {2.5, 6.2, 8.2, 4846.354, 9.6};

​

// First position

double firstNum = array_doubles[0]; // 2.5

​

// Last position

double lastNum = array_doubles[array_doubles.length - 1]; // 9.6