Java代码集合的相关内容

[帮助文档] 使用Java请求处理程序响应事件并执行相关业务代码

您可以使用Java请求处理程序响应接收到的事件并执行相应的业务逻辑。本文介绍Java请求处理程序的相关概念、结构特点和示例。

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Java【代码分享 12】判断一个集合是否包含另一个集合中的一个或多个元素 retainAll() 及其他方法

1.原因说明业务中有这么一个逻辑：判断第一个集合里包含第二个集合中的一个或多个元素。首先想到的是 contains() 但是它的参数只能传 Object，还有另一个也就是 retainAll() 它可以传 Collection<?>。2.代码测试public class TestReta...

【Java】一行代码进行集合去重

这几天在研究SpringBoot的底层源码的时候发现了一个重来没想到过的操作。之前对于一个List集合，如果我要去重，那么我都是暴力遍历的，但是今天发现有一个很快的操作。废话不多说，直接贴代码。这个使用的是Set集合要求数据不重复的特点来做到的。这样子如果我们需要去重后集合仍有序，就可以把有重复数据...

[帮助文档] DataphinJava代码调用数据服务API报错ColumnsAuthCheckFailed:XXX"

问题描述Dataphin Java代码调用数据服务API报错“Columns Auth Check Failed: XXX"。问题原因Java代码编辑错误，数据服务API没有该返回值。解决方案修改Java代码，去掉不存在的数据服务API返回值即可。适用于Dataphin数据服务API

[帮助文档] DataphinJava代码调用数据服务API报错APInotfoundwith`POST/get/XXX`"

问题描述Dataphin Java代码调用数据服务API报错“API not found with `POST /get/XXX`"。问题原因该数据服务API不存在或Java代码请求方式错误。解决方案如果数据服务API存在，则修改Java代码请求方式即可。适用于Dataphin数据服务

[帮助文档] Dataphin如何解决数据源查询逻辑表数据,运行报错java.sql.SQLException:executeerror:Tableforbidden

问题描述Dataphin 通过SDK代码调用“服务”模块发布的“Dataphin数据源”查询逻辑表数据，运行报错“java.sql.SQLException:execute error: Table forbidden”问题原因SQL语句中没有带业务板块导致。解决方案修改SDK代码，SQL语句中加上...

Java：程序不过是几行代码的集合

程序不过是几行代码的集合。就像下面这样：public class Test { public static void main(String[] args) { System.out.println("hello world"); } }对于初学编程的人来说，“hello world”总是绕不开的；...

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