java基础语法Java string 的相关内容

【JavaSE】Java基础语法(三十七)：Java 中的 String 类（源码级别）(2)

2.11 char[] toCharArray()2.12 String substring(int beginIndex)从传入的索引处截取，截取到末尾，得到新的字符串2.13 String substring(int beginIndex， int endIndex)根据开始和结束索引进行截取，...

【JavaSE】Java基础语法(三十七)：Java 中的 String 类（源码级别）(1)

String 表示字符串类型，属于引用数据类型。Java 中 String 是不可变的。在 Java 当中双引号括起来的字符串，是直接存储在“方法区”的“字符串常量池”当中的。1. 构造方法1.1 String()源码：/** 初始化新创建的字符串对象，使其表示空字符序列。请注意，由...

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[帮助文档] QuickBI图表外部链接跳转报错Failedtoconvertvalueoftype'java.lang.String'torequiredtype'java.lang.Long';nestedexceptionisjava.lang.NumberFormatException:Forinputstring:"[order_id]"

问题描述Quick BI图表外部链接跳转报错：Failed to convert value of type 'java.lang.String' to required type 'java.lang.Long'; nested exception is java.lang.NumberForma...

[帮助文档] Dataphin集成任务报错java.lang.NumberFormatException:Forinputstring:"null"

问题描述用户是用集成任务同步数据，从AnalyticDB MySQL2.0同步到其他数据库，任务报错“com.alibaba.datax.common.exception.DataXException: Code:[ADSReader-00], Description:[错误发生了，请联系管理员]....

[帮助文档] Dataphin管道任务报错java.sql.SQLException:Incorrectstringvalue:'\xF4\x80\x80\x8E\xF4\x80...'forcolumn'XXX'atrow1

问题描述用户使用管道任务同步数据到MySQL，任务报错“java.sql.SQLException: Incorrect string value: '\xF4\x80\x80\x8E\xF4\x80...' for column 'XXX' at row 1”。问题原因报错字段有特殊符号，UTF-...

[帮助文档] 同步任务报错java.sql.SQLException:Incorrectstringvalue:'\xF4\x80\x80\x8E\xF4\x80...'forcolumn'XXX'atrow1

问题描述用户在使用集成任务同步数据到MySQL过程中，同步任务报错“java.sql.SQLException: Incorrect string value: '\xF4\x80\x80\x8E\xF4\x80...' for column 'XXX' at row 1”。问题原因报错字段可能存储...

【Java 基础语法】万字解析 Java 的 String 类

前言：在 C 语言中并没有字符串类型，而 Java 中却有着 String。之前就介绍过 Java 的数据类型，但是 String 类型还有着很多的知识没有介绍到。今天这节就是深度解析一下 Java 中的字符串类型，让我们更加了解它，更容易玩转字符串。@[toc]学习 Java 时我总是离不开它的 ...

[帮助文档] Dataphin中管道任务将MySQL数据同步到Maxcompute,运行报错[同步数据出现业务脏数据情况,数据类型转换错误.]-String['']不能转为BigDecimal.-java.lang.NumberFormatException

问题描述管道任务将MySQL数据同步到Maxcompute，运行报错“[同步数据出现业务脏数据情况，数据类型转换错误 .] - String [''] 不能转为BigDecimal . - java.lang.NumberFormatException”。完整的异常如下：2021-11-05 00:...

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