Java Array Exercises: Replace each element of the array with product of every other element in a given array of integers
Java Array: Exercise-63 with Solution
Write a Java program to replace each element of the array with product of every other element in a given array of integers.
Example:
Input :
nums1 = { 1, 2, 3, 4, 5, 6, 7}
nums2 = {0, 1, 2, 3, 4, 5, 6, 7}
Output:
Array with product of every other element:
[5040, 2520, 1680, 1260, 1008, 840, 720]
Array with product of every other element:
[5040, 0, 0, 0, 0, 0, 0, 0]
Sample Solution:
Java Code:
import java.util.Arrays;
class solution
{
public static int[] find_Product_in_array(int[] nums)
{
int n = nums.length;
int[] left_element = new int[n];
int[] right_element = new int[n];
left_element[0] = 1;
for (int i = 1; i < n; i++) {
left_element[i] = nums[i - 1] * left_element[i - 1];
}
right_element[n - 1] = 1;
for (int j = n - 2; j >= 0; j--) {
right_element[j] = nums[j + 1] * right_element[j + 1];
}
for (int i = 0; i < n; i++) {
nums[i] = left_element[i] * right_element[i];
}
return nums;
}
public static void main(String[] args)
{
int[] nums1 = { 1, 2, 3, 4, 5, 6, 7};
System.out.println("Original array:\n"+Arrays.toString(nums1));
int[] result1 = find_Product_in_array(nums1);
System.out.println("Array with product of every other element:\n" + Arrays.toString(result1));
int[] nums2 = {0, 1, 2, 3, 4, 5, 6, 7};
System.out.println("\nOriginal array:\n"+Arrays.toString(nums2));
int[] result2 = find_Product_in_array(nums2);
System.out.println("Array with product of every other element:\n" + Arrays.toString(result2));
}
}
Sample Output:
Original array: [1, 2, 3, 4, 5, 6, 7] Array with product of every other element: [5040, 2520, 1680, 1260, 1008, 840, 720] Original array: [0, 1, 2, 3, 4, 5, 6, 7] Array with product of every other element: [5040, 0, 0, 0, 0, 0, 0, 0]
Flowchart:
Java Code Editor:
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Java: Tips of the Day
How to sort an ArrayList?
Collections.sort(testList); Collections.reverse(testList);
That will do what you want. Remember to import Collections though!
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