# How do I make sure an array is sorted?

## How do I make sure an array is sorted?

The steps in the iterative approach are as follows.

1. If the length of the array is zero or one, then the array is sorted.
2. Start looping from the first element.
3. Compare every two elements. a.
4. The loop will eventually come to the end of the array when all the array elements are in sorted order.

How do you check the array is sorted or not in Java?

1. public static boolean isSorted(int[] a) {
2. if (a == null || a. length <= 1) { return true;
3. for (int i = 0; i < a. length – 1; i++) {
4. if (a[i] > a[i + 1]) { return false;
5. public static void main(String[] args) {
6. System. out. println(isSorted(a)); // true. }

How do I check if a String is sorted?

“` public static void main(String[] args) { List list = Arrays. asList(1,2,9,7,4); System. out. println(isSorted(list)); } “` expecte print false, but print true.

### Is sorted method in Java?

Java sort() In Java, the collections framework provides a static method sort() that can be used to sort elements in a collection. The sort() method of the collections framework uses the merge sort algorithm to sort elements of a collection.

How do you check if an array is sorted and rotated?

Take Input of an array element. A Boolean function checkSortedandRotated(int *arr, int n) takes an array and its size as the input and returns true if the array is sorted and rotated otherwise false. Iterate over the whole array and count the number of elements which are (arr[i] > arr[i+1]%n).

How can you tell if an array is sorted in descending order?

To check for a sorted array in descending order, you can pass the comparison function std::greater() that represents an object class for greater-than inequality comparison. The default comparison function works fine for an array of std::string .

## How do you know if an array is in descending order?

for (int i = 0; i < data. length-1; i++) { if (data[i] > data[i+1]) { return false; } } return true; Conversely, the descending check should be (and notice that it’s enough to change the direction of the comparison operator): for (int i = 0; i < data.

Which sorting is best in Java?

Heap sort is one of the most important sorting methods in java that one needs to learn to get into sorting. It combines the concepts of a tree as well as sorting, properly reinforcing the use of concepts from both.

What sorting algorithm is used in Java?

Java’s Arrays. sort method uses quicksort, insertion sort and mergesort. There is even both a single and dual pivot quicksort implemented in the OpenJDK code.

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