RemoveDuplicates.java

public class RemoveDuplicates {
    public int removeDuplicates(int[] nums) {
        if (nums.length == 0) {
            return 0;
        }

        int k = 1; // Initialize the count of unique elements to 1
        for (int i = 1; i < nums.length; i++) {
            if (nums[i] != nums[k - 1]) {
                nums[k] = nums[i]; // Overwrite the next unique element
                k++;
            }
        }

        return k;
    }

    public static void main(String[] args) {
        RemoveDuplicates solution = new RemoveDuplicates();
        int[] nums = {1, 1, 2, 2, 3}; // Sample input
        int length = solution.removeDuplicates(nums);
        
        System.out.println("Length of array after removing duplicates: " + length);
        System.out.print("Array after removing duplicates: ");
        for (int i = 0; i < length; i++) {
            System.out.print(nums[i] + " ");
        }
    }
}