Java: Print all sub-arrays with 0 sum present in a given array of integers

Last update on December 21 2024 09:33:25 (UTC/GMT +8 hours)

Write a Java program to print all sub-arrays with 0 sum present in a given array of integers.

Example:
Input :
nums1 = { 1, 3, -7, 3, 2, 3, 1, -3, -2, -2 }
nums2 = { 1, 2, -3, 4, 5, 6 }
nums3= { 1, 2, -2, 3, 4, 5, 6 }
Output:
Sub-arrays with 0 sum : [1, 3, -7, 3]
Sub-arrays with 0 sum : [3, -7, 3, 2, 3, 1, -3, -2]
Sub-arrays with 0 sum : [1, 2, -3]
Sub-arrays with 0 sum : [2, -2]

Sample Solution:

Java Code:

// Import necessary Java classes.
import java.util.*;
import java.lang.*;

// Define a class named 'solution'.
class solution
{
    // A method to print all subarrays with a sum of zero.
    public static void print_all_Subarrays(int[] A)
    {
        // Create a list to store elements of subarrays.
        List<Integer> llist = new ArrayList<Integer>();

        // Iterate through the array.
        for (int i = 0; i < A.length; i++)
        {
            int sum = 0;
            llist.removeAll(llist);

            // Nested loop to find subarrays starting from index i.
            for (int j = i; j < A.length; j++)
            {
                sum += A[j];
                llist.add(A[j]);

                // If the sum of the subarray is zero, print it.
                if (sum == 0) {
                    System.out.println("Sub-arrays with 0 sum: " + llist.toString());
                }
            }
        }
    }

    public static void main (String[] args)
    {
        // Define an array 'nums1'.
        int[] nums1 = { 1, 3, -7, 3, 2, 3, 1, -3, -2, -2 };
        System.out.println("\nOriginal array: " + Arrays.toString(nums1));
        
        // Print all subarrays with a sum of zero for 'nums1'.
        print_all_Subarrays(nums1);
        
        // Define another array 'nums2'.
        int[] nums2 = { 1, 2, -3, 4, 5, 6 };
        System.out.println("\nOriginal array: " + Arrays.toString(nums2));
        
        // Print all subarrays with a sum of zero for 'nums2'.
        print_all_Subarrays(nums2);

        // Define yet another array 'nums3'.
        int[] nums3= { 1, 2, -2, 3, 4, 5, 6 };
        System.out.println("\nOriginal array: " + Arrays.toString(nums3));
        
        // Print all subarrays with a sum of zero for 'nums3'.
        print_all_Subarrays(nums3);
    }
}

Sample Output:

                                                                              
Original array: [1, 3, -7, 3, 2, 3, 1, -3, -2, -2]
Sub-arrays with 0 sum : [1, 3, -7, 3]
Sub-arrays with 0 sum : [3, -7, 3, 2, 3, 1, -3, -2]

Original array: [1, 2, -3, 4, 5, 6]
Sub-arrays with 0 sum : [1, 2, -3]

Original array: [1, 2, -2, 3, 4, 5, 6]
Sub-arrays with 0 sum : [2, -2]

Flowchart:

Java Code Editor:

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