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记一次synchronized锁字符串引发的坑兼再谈Java字符串

转自：www.cnblogs.com/xrq730/p/66… 问题描述业务有一个需求，我把问题描述一下：通过代理IP访问国外某网站N，每个IP对应一个固定的网站N的COOKIE，COOKIE有失效时间。并发下，取IP是有一定策略的，取到IP之后拿IP对应的COOK...

LeetCode题解-字符串转数字-Java

字符串转数字，这是个很有趣的题目。下面是我的解答，改了好几遍才通过。 class Solution { public static int myAtoi(String str) { //如果该字符串第一个字符非有效整数字符、串为空、仅包含空白返回0 if(str.isEmpty()) return...

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6-4 字符串加密（Java解法，两种网上的类型题）

6-4字符串加密，第一种类型题：本题要求实现一个函数，能对一行字符串(字符串的长度<80)加密。加密函数采用的加密算法：如果不是英文字母，就不加密，原样显示；否则就将字母加上一个偏移值5实现加密。 ...

L1-2 倒数第N个字符串（Java）

题目L1-2 倒数第N个字符串分数 15作者陈越单位浙江大学给定一个完全由小写英文字母组成的字符串等差递增序列，该序列中的每个字符串的长度固定为 L，从 L 个 a 开始，以 1 为步长递增。例如当 L 为 3 时，序列为 { aaa, aab, aac, …, aaz, aba, abb, …...

C语言实验——输出字符串-java

C语言实验——输出字符串Time Limit: 1000 ms Memory Limit: 65536 KiBSubmitStatisticDiscussProblem Description在屏幕上输出一行信息：This is a C program.Input无输入数据。Output输出字符串T...

557. 反转字符串中的单词 III --力扣 --JAVA

题目给定一个字符串 s ，你需要反转字符串中每个单词的字符顺序，同时仍保留空格和单词的初始顺序。解题思路将字符串按照空格划分为字符串数组；将字符串数组中的每个元素翻转；重新拼接字符串数组并在中间添加空格符。代码展示class Solution { public String revers...

给定一个字符串数组，如何找到其中最长的回文子串？要求：编写一个Java函数，输入一个字符串数组，输出其中最长的回文子串。要求时间复杂度为O(n^2)。可以考虑使用动态规划或中心扩展的方法来优化算法。

在Java中，我们可以使用动态规划的方法来解决这个问题。下面是具体的代码实现： public class Solution { public String longestPalindrome(String[] strs) { if (strs == null || strs.length == 0)...

1657. 确定两个字符串是否接近 --力扣 --JAVA

题目如果可以使用以下操作从一个字符串得到另一个字符串，则认为两个字符串接近：操作 1：交换任意两个现有字符。例如，abcde -> aecdb操作 2：将一个现有字符的每次出现转换为另一个现有字符，并对另一个字符执行相同的操作。例如，aacabb -> b...

对字符串中所有单词进行倒排-C语言/Java

描述输入一个字符串，输出字符串中单词的倒序。要求构成单词的字符只有26个大写或小写英文字母。非构成单词的字符均视为单词间隔符；倒排后的单词间隔符以一个空格表示；如果原字符串中相邻单词间有多个间隔符时，倒排转换后也只允许出现一个空格间隔符每个单词...

字符串统计-C语言/Java

描述计算字符串中含有的不同字符的个数。字符在 ASCII 码范围内( 0~127 ，包括 0 和 127 )，换行表示结束符，不算在字符里。不在范围内的不作统计。多个相同的字符只计算一次。数据范围：&nb...

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