BalancedBrackets.java

// Balanced Brackets Checker
import java.util.Scanner;
import java.util.Stack;

public class BalancedBrackets {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter the bracket expression:");
        String expression = sc.nextLine();

        if (isBalanced(expression)) {
            System.out.println("Balanced");
        } else {
            System.out.println("Not Balanced");
        }

        sc.close();
    }
    public static boolean isBalanced(String str) {
        Stack<Character> stack = new Stack<>();

        for (char ch : str.toCharArray()) {
            if (ch == '(' || ch == '{' || ch == '[') {
                stack.push(ch);
            }
            else if (ch == ')' || ch == '}' || ch == ']') {
                if (stack.isEmpty()) return false;

                char top = stack.pop();
                if (!isMatching(top, ch)) return false;
            }
        }
        return stack.isEmpty();
    }
    public static boolean isMatching(char open, char close) {
        return (open == '(' && close == ')') ||
               (open == '{' && close == '}') ||
               (open == '[' && close == ']');
    }
}