BEST TIME TO BUY AND SELL STOCK IN JAVA PROGRAM

Example 1:Input: prices = [7,1,5,3,6,4]
Output: 5
Explanation: Buy on day 2 (price = 1) and sell on day 5 (price = 6), profit = 6-1 = 5. Note that buying on day 2 and selling on day 1 is not allowed because you must buy before you sell.

public class Solution {
    public int maxProfit(int[] prices) {
        if (prices == null || prices.length <= 1) {
            return 0;
        }

        int minPrice = prices[0];
        int maxProfit = 0;

        for (int i = 1; i < prices.length; i++) {
            if (prices[i] < minPrice) {
                minPrice = prices[i];
            } else {
                int profit = prices[i] - minPrice;
                maxProfit = Math.max(maxProfit, profit);
            }
        }

        return maxProfit;
    }

    public static void main(String[] args) {
        Solution solution = new Solution();
        int[] prices = {7, 1, 5, 3, 6, 4};
        System.out.println(solution.maxProfit(prices)); // Output: 5
    }
}

}