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Odd Even Sort in java

Posted on November 27, 2021November 27, 2021 By christo No Comments on Odd Even Sort in java

Complete programme of Odd Even Sort in java

import java.util.Random;

// https://en.wikipedia.org/wiki/Odd%E2%80%93even_sort
public class OddEvenSort {

    public static void main(String[] args) {
        int[] arr = new int[100];

        Random random = new Random();

        // Print out unsorted elements
        for (int i = 0; i < arr.length; ++i) {
            arr[i] = random.nextInt(100) - 50;
            System.out.println(arr[i]);
        }
        System.out.println("--------------");

        oddEvenSort(arr);

        //Print Sorted elements
        for (int i = 0; i < arr.length - 1; ++i) {
            System.out.println(arr[i]);
            assert arr[i] <= arr[i + 1];
        }
    }

    /**
     * Odd Even Sort algorithms implements
     *
     * @param arr the array contains elements
     */
    public static void oddEvenSort(int[] arr) {
        boolean sorted = false;
        while (!sorted) {
            sorted = true;

            for (int i = 1; i < arr.length - 1; i += 2) {
                if (arr[i] > arr[i + 1]) {
                    swap(arr, i, i + 1);
                    sorted = false;
                }
            }

            for (int i = 0; i < arr.length - 1; i += 2) {
                if (arr[i] > arr[i + 1]) {
                    swap(arr, i, i + 1);
                    sorted = false;
                }
            }
        }
    }

    /**
     * Helper function to swap two array values.
     *
     * @param arr the array contains elements
     * @param i the first index to be swapped
     * @param j the second index to be swapped
     */
    private static void swap(int[] arr, int i, int j) {
        int temp = arr[i];
        arr[i] = arr[j];
        arr[j] = temp;
    }
}

java Tags:java, Odd Even Sort in java

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