how to get the last element of array in java

1firstNum = numbers[0];
2lastNum = numbers[numbers.length-1];

1ArrayList<Integer> list = new ArrayList<Integer>(5); 
2int last = list.get(list.size() - 1); 

1int[] someArray = {1,2,3,4,5};
2int first = someArray[0];
3int last = someArray[someArray.length - 1];
4System.out.println("First: " + first + "\n" + "Last: " + last);

1int[] arr = new int[5]; //length of the array is 5
2int val = arr[arr.length - 1]; //here variable val stores the last element of arr