Underscores in Numeric Literals In Java SE 7 and later, any number of underscore characters (_) can appear anywhere between digits in a numerical literal. This feature enables you, for example, to...

Array Empty array: int[] arr1 = new int[0]; int[][] arr2 = new int[0][0]; ArrayDeque Null elements are prohibited. Arrays public static <T> List<T> asList(T… a): fixed-size, mu...

Binary Search public int search(int[] nums, int target) { int low = 0, high = nums.length - 1; while (low <= high) { int mid = (low + high) >>> 1; if (nums[mid]...