Question

How to rearrange array and set even indexed values to be smaller than odd indexed values in Java

Answer 1

import java.util.Arrays;

public class MyClass {
    private static void RearrangeOddEven(int[] arr) {
    	for (int i = 0; i < arr.length - 1; i++) {
    		if (i % 2 == 0 && arr[i] > arr[i + 1]) {
    			int temp = arr[i];
                arr[i] = arr[i + 1];
                arr[i + 1] = temp;
    		}
    		if (i % 2 != 0 && arr[i] < arr[i + 1]) {
    			int temp = arr[i];
                arr[i] = arr[i + 1];
                arr[i + 1] = temp;
    		}
    	}
    }
    public static void main(String args[]) {
      	int[] arr = {1, 2, 3, 5, 8, 6, 7, 4};
	
	    RearrangeOddEven(arr);

	    System.out.println(Arrays.toString(arr));
    }
}




/*
run:
 
[1, 3, 2, 8, 5, 7, 4, 6]
 
*/

 

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