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Insertion Sort is a simple, in-place sorting algorithm that builds the sorted array one element at a time by inserting each new element into its correct position among the already sorted elements. It works best for small or nearly sorted datasets.
Example:
public class InsertionSort {public static void main(String[] args) {int[] arr = {12, 11, 13, 5, 6};for (int i = 1; i < arr.length; i++) {int key = arr[i];int j = i - 1;// Shift elements greater than key to one position aheadwhile (j >= 0 && arr[j] > key) {arr[j + 1] = arr[j];j--;}arr[j + 1] = key;}// Print sorted arrayfor (int num : arr) {System.out.print(num + " ");}}}Copied!✕CopyHow it works:
Start from the second element (i = 1), treating the first as sorted.
Compare the current element (key) with elements in the sorted portion.
Shift all larger elements one position to the right.
Insert key into its correct position.
Repeat until the array is fully sorted.
Output for the above example:
5 6 11 12 13Copied!✕CopyKey Points:
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Jul 23, 2025 · Insertion sort is a simple sorting algorithm that works the way we sort playing cards in our hands. In this article, we will write the program on Insertion Sort in Java.
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Insertion sort is a simple sorting algorithm that works the way we sort playing cards in our hands. In this article, we will write the program on Insertion Sort in …
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See more on baeldung.comIn this tutorial, we’re going to discuss the Insertion Sort algorithm and have a look at its Java implementation. Insertion Sort is an efficient algorithm for ordering a small number of items. This method is based on the way card players sort a hand of playing cards. We start with an empty left hand and the cards laid down on the table. We then rem...- Published: Oct 10, 2018
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