3.Solutions: 1/**2* Created by sheepcore on 2019-05-073*/45classSolution {6publicbooleanisValid(String s) {7Stack<Character> stack =newStack<Character>();89for(charch : s.toCharArray()){10switch(ch){11case'(':12case'{':13case'[': stack.push(ch);break;14case')':15if(!stack....
检查字符是用==,检查String是用.isEqual(),因为String是引用类型,值相等但是地址可能不等。 代码如下: 1publicbooleanisValid(String s) { 2if(s.length()==0||s.length()==1) 3returnfalse; 4 5Stack<Character> x =newStack<Character>(); 6for(inti=0;i<s.length();i++){ 7if(s.charAt(i...
7、如果栈为空,则匹配成功,返回true,程序结束;否则返回false,匹配不成功,程序结束。 import java.util.Stack; class Solution { public boolean isValid(String s) { Stack<Character> stack_match = new Stack<Character>(); for(int i=0;i<s.length();i++){ if(s.charAt(i)=='(' || s.charAt(...
An input string is valid if: 如果输入字符串有效 Open brackets must be closed by the same type of brackets. 必须使用相同类型的括号关闭左括号 Open brackets must be closed in the correct order. 必须用正确的顺序关闭左括号 Note that an empty string is also considered valid. 注意,空字符串也被视...
建议和leetcode 32. Longest Valid Parentheses 最长有效括号长度和 leetcode 678. Valid Parenthesis String 有效括号的判断 一起学习 代码如下: import java.util.ArrayList; import java.util.List; public class Solution { public boolean isValid(String s) ...
Can you solve this real interview question? Valid Parentheses - Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An input string is valid if: 1. Open brackets must be closed by th
41. Longest Valid Parentheses 最长有效括号算法:本题用两种方法解,一是stack,二是双向遍历面试准备系列,注重培养互联网大厂的面试能力,注重编程思路,coding限时,代码规范,想要求职,转行或者跳槽的朋友们别忘了一键三连一下,新人up主需要你宝贵的支持哟~
package leetcode._20;import java.util.Stack;publicclassSolution{publicbooleanisValid(String s){Stack<Character>stack=newStack<>();for(inti=0;i<s.length();i++){charc=s.charAt(i);if(c=='('||c=='['||c=='{'){stack.push(c);}else{if(stack.isEmpty()){returnfalse;}chartop=stack...
20. Valid Parentheses Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. 给定一个字符串,字符串中包含各种括号。判断输入的字符串是否符合规定 An input string is valid if: ...
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