how to find last element in array java

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

arrayName[arrayName.length() - 1];

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

firstNum = numbers.get(0);
lastNum = numbers.get(numbers.size() - 1); 

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

// GIVE FIRST NUMBER AND LAST NUMBER
firstNum = numbers[0];
lastNum = numbers[numbers.length-1];