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LeetCode 2700: Differences Between Two Objects Solution

Master LeetCode problem 2700 (Differences Between Two Objects), a medium challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.

2700. Differences Between Two Objects

Medium

Problem Explanation

Explanation:

To find the differences between two objects, we need to compare the values of their corresponding fields and identify the fields that have different values. We can achieve this by iterating over the fields of the objects and comparing their values. If the values are different, we store the field name along with the values in a list.

Algorithm:

  1. Iterate over the fields of both objects.
  2. For each field, compare the values of the corresponding fields in the two objects.
  3. If the values are different, store the field name and values in a list.
  4. Return the list of field names with different values.

Time Complexity: O(n) where n is the number of fields in the objects. Space Complexity: O(1) excluding the space required to store the differences.

:

Solution Code

import java.util.*;

public class Solution {
    public List<String> findDifferences(Object obj1, Object obj2) {
        List<String> differences = new ArrayList<>();
        
        Field[] fields1 = obj1.getClass().getDeclaredFields();
        Field[] fields2 = obj2.getClass().getDeclaredFields();
        
        for(int i=0; i<fields1.length; i++) {
            fields1[i].setAccessible(true);
            fields2[i].setAccessible(true);
            try {
                if(!Objects.equals(fields1[i].get(obj1), fields2[i].get(obj2))) {
                    differences.add(fields1[i].getName() + ": " + fields1[i].get(obj1) + " vs " + fields2[i].get(obj2));
                }
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
        }
        
        return differences;
    }
}

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