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int [] numbers = {1, 2, 3, 4, 5};
firstElement = numbers[0];
lastElement = numbers[numbers.length-1];
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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
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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);
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firstNum = numbers.get(0);
lastNum = numbers.get(numbers.size() - 1);
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// 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