LeetCode——Valid Palindrome
Description:
Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.
For example, "A man, a plan, a canal: Panama"
is a palindrome. "race a car"
is not a palindrome.
public class Solution { public boolean isPalindrome(String s) { StringBuilder str = new StringBuilder(); for(int i=0; i<s.length(); i++) { if(s.charAt(i)>='a'&&s.charAt(i)<='z' || s.charAt(i)>='A'&&s.charAt(i)<='Z' || s.charAt(i)>='0'&&s.charAt(i)<='9') { str.append(s.charAt(i)); } } str = new StringBuilder(str.toString().toLowerCase()); int flag = 1; for(int i=0; i<str.length()/2; i++) { if(str.charAt(i) != str.charAt(str.length()-i-1)) { flag = 0; break; } } if(flag == 1) return true; else return false; } }
作者:Pickle
声明:对于转载分享我是没有意见的,出于对博客园社区和作者的尊重一定要保留原文地址哈。
致读者:坚持写博客不容易,写高质量博客更难,我也在不断的学习和进步,希望和所有同路人一道用技术来改变生活。觉得有点用就点个赞哈。
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