【Java】括号匹配

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括号匹配模式

解题思路

栈

import java.util.Scanner;
import java.util.Stack;

/**
 * @Author bennyrhys
 * @Date 2020-09-20 15:24
 */
public class T71 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();

        System.out.println(isS(s));
    }

    private static boolean isS(String s) {
        Stack<Character> stack = new Stack<>();
        for (int i = 0; i < s.length(); i++) {
            char c = s.charAt(i);
            if (c == '(')
                stack.push(')');
            if (c == '[')
                stack.push(']');
            if (c == '{')
                stack.push('}');


            if (c == ')' || c == ']' || c== '}') {
                if (stack.size() == 0)
                    return false;
                if (stack.pop() != c)
                    return false;

            }

        }
        if (stack.size() != 0)
            return false;
        return true;
    }
}