Java String_第5页-阿里云

【Java SE语法篇】10.String类

前言在程序开发中经常会用到字符串。字符串是指一连串的字符，它是由许多单个字符连接而成的，如多个英文字母所组成的英文单词。字符串可以包含任意字符，这些字符必须包含在一对双引号""之内，例如：“abc”。Java定义了3个封装字符串的类，分别是String类、StringBuffer类和StringB...

Java字符串内幕：String、StringBuffer和StringBuilder的奥秘

前言字符串是任何编程语言中都不可或缺的一部分，它们用于存储和操作文本数据。在Java中，有三种主要的字符串类型：String、StringBuffer和StringBuilder。尽管它们似乎有着相似的功能，但实际上它们之间存在重要的区别，这些区别对于编写高效的代码至关重要。在本文中，我们将深入探...

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Java中的字符串String

一、常用方法 1、字符串构造三种构造方法（1）、直接赋值 String s1 = "hello world"; System.out.println(s1); ...

【JAVA基础】String、StringBuilder和StringBuffer的区别——巨详细

【JAVA基础】String、StringBuilder和StringBuffer的区别——巨详细先给答案 String是不可变的，StringBuilder和StringBuffer是可变的。而StringBuffer是线程安全的，而StringBuilder是非线程安全的。源码先看看jdk...

$Mysql报Cause: java.sql.SQLException: Incorrect string value: ‘\xE5\xA4\x96‘...for column username$

Mysql报Cause: java.sql.SQLException: Incorrect string value: ‘\xE5\xA4\x96‘...for column username

嗨嗨嗨解决bug的第一天看bug 聪明的人的一眼就能看出来这一堆的16进制数字肯定是编码问题(那我们怎么解决这个问题呢)第一我去查看了表的DDL发现表的编码不是utf-8就知道了在创建数据库的时候编码设置错了然间我想到的是更改表的编码为utf-8；alter table 表名 default cha...

String类中的一些常用方法(JAVA)

字符串比较方法：boolean equals(Object anObject)：比较两个字符串是否相等，相等返回ture，否则返回falsepublicstaticvoidmain(String[] args) { Stringa="asdf"; System.out.println(a.equal...

java中两个String字符串比较去重

假设有两个字符串String qc1 = "张三,李四,赵二,谢大脚,刘能";String qc2 = "谢广坤,谢大脚,张三";如何去重，只留下qc2中不包含qc1中的字段呢，这时候要用到indexOf()； java.lang.String.indexOf(String str)indexOf(...

Java中的String类与StringBuilder、StringBuffer的比较：缺点与解决办法

Java中的String类与StringBuilder、StringBuffer的比较：缺点与解决办法在Java编程语言中，String类是一个非常常用和重要的类。它代表字符串，并提供了许多操作和处理字符串的方法。然而，String类也存在一些缺点。在本文中，我们将详细讲解String类的缺点，并结...

Java中的String类：原理、设计思想和与数组比较的优势

Java中的String类：原理、设计思想和与数组比较的优势在Java编程语言中，String类是一个非常重要且广泛使用的类。它代表字符串，并提供了许多有用的方法来操作和处理文本数据。在本文中，我们将详细讲解String类的原理、设计思想，并对比其与数组的优势。String类的原理和设计思想不可变性...

Java中String字符串截取几种方法（substring,split）

Java中String字符串截取几种方法substring,split这是一个Java中的String的基础用法的演示。下面通过代码对大家进行讲解substring这里用来ndexOf,lastIndexOf这两个函数进行字符定位，一个是从前往后寻找第一个，一个是从后往前寻找第一个。splitspl...

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