public int findNumber(String str){ String result = ""; //循环找寻字符串中的每一个 字符 //判断当前找到的字符是否是 数字 '0'---'9' 48--57 for(int i=0;i<str.length();i++){ int code = str.codePointAt(i);//每一个字符对应的code码 if(code>=48 && code<=57){ result += (ch...
The input String is not a palindrome. 程序2:回顾检查使用队列 importjava.util.Queue;importjava.util.Scanner;importjava.util.LinkedList;classPalindromeTest{publicstaticvoidmain(String[] args){ System.out.print("Enter any string:"); Scanner in=newScanner(System.in);StringinputString=in.nextLine();...
//https://leetcode-cn.com/problems/longest-palindromic-substring/description/ class Solution { private int index, len; public String longestPalindrome(String s) { if (s.length() < 2) return s; for (int i = 0; i < s.length() - 1; i++) { PalindromeHelper(s, i, i); PalindromeH...
public String longestPalindrome(String s) { if (s == null || s.length() < 2) return s; //return as result String longest = s.substring(0, 1); for (int i = 0; i < s.length()-1; i++) { //get 'ABA' type palindrome String cur = getPalindrome(s, i, i); //get 'ABBA...
LeetCode 125. Valid Palindrome 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&q...Leetcode 125. Valid Palindrome Given a string, determine if it...
Have you consider that the string might be empty? This is a good question to ask during an interview. For the purpose of this problem, we define empty string as valid palindrome. 解题思路: 设置两个指针,一个在字符串头部,一个在字符串尾部,分别向中间移动,遇到非字母或数字则继续向中间移动,如...
java-leetcode题解之009-Palindrome-NumberGu**de 上传1KB 文件格式 java Java入门题解之009_PalindromeNumber是一个关于判断一个数字是否为回文数的Java问题。这个问题要求我们编写一个函数,输入一个整数n,输出该整数是否为回文数。 解题思路: 1. 首先,我们需要检查输入的数字是否为正数。如果不是正数,直接返回...
// Java code for checking string palindrome public class Main { //function to check whether string is Palindrome or not public static boolean isPalindrome(String str) { // Checking for null if (str == null) { throw new IllegalArgumentException("String is null."); } // length of the ...
Sometimes, an interviewer might request that you don’t use any other class to check for a palindrome. In that case, you can compare characters in the string from both ends to find out if it’s a palindrome. For example: privatestaticbooleanisPalindromeString(Stringstr){if(str==null)return...
Below image shows the output of the above longest palindrome java program. We can improve the above code by moving the palindrome and longest lengths check into a different function. However, I have left that part for you. :) Please let me know if there are any other better implementations...