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Roc`s 随想录 | coderroc.com Reviews
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关注技术趋势,服务端技术细节,Java语言,技术热点等,关注思维和最佳实践。
分类: 思维改变生活 | Roc`s 随想录
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主题 - NexT.Pisces.
Mockito初使用 | Roc`s 随想录
http://coderroc.com/article/知识记录/simple-mockito.html
但是自己跑单测的时候,有的时候某些RPC服务不好配置 or 无线下测试环境,所以我们需要对这些难以实例化等的对象进行Mock adj. 模拟的 仿制的 虚假的 不真实的。 Mockito is a mocking framework that tastes really good. It lets you write beautiful tests with a clean and simple API. Mockito doesn’t give you hangover because the tests are very readable and they produce clean verification errors. Read more about features and motivations. Http:/ mvnrepository.com/artifact/org.mockito/mockito-all -. Orgmockito.Mockito.*;. List mockedList = mock(List.class);. The following prints "first".
Roc`s 随想录
http://coderroc.com/page/2
最近接到一个任务, 在原有的项目基础上进行开发, 增加一个新功能, 有之前的类似功能对照.看起来挺简单的, 然后立刻准备开发, 但是碰壁一头雾水, 工程太复杂了, 涉及的子工程比较多, 类/配置文件等特别多. 然后开始从网上搜索 怎样阅读别人的代码 , 总结了下:. 001: money; money = Math.floor(money * 100) / 100; redPackage.remainSize- ; redPackage.remainMoney -= money; return money; }. Initialization On Demand Holder. Public class Singleton { / 这个实例要不要不可变(final),一般不需要 private static Singleton singleton = new Singleton(); / 私有化构造器 private Singleton() public static Singleton getInstance() { return singleton; } }. Java 8 之前 已有 的函数式接口.
Thinking in Java 读书笔记 — 第1章 对象导论 | Roc`s 随想录
http://coderroc.com/article/知识记录/thinking-in-java-chapter-one-Introduction-to-Objects.html
Thinking in Java 读书笔记 第1章 对象导论. 161 是一个 与 像是一个 的关系. Java是一种纯面向对象的语言 虽然含有基本数据类型,但那不是主要部分 ,我们经常谈到面向对象三大特性 继承、封装、多态,除此之外,还有以下的描述。 通俗的说法是,每个对象都是某个类 class 的一个实例 instance。 比如从class - SomeType new instance,中间有Interface、AbstractClass等,都有类似的思想。 Java是允许一个类实现多个接口的,到了JDK 1.8,接口引入了新的特性 默认实现,关键字是. System.out.println( "InterfaceA". System.out.println( "InterfaceB". 主题 - NexT.Pisces.
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舒の随想日记
http://blog.hesey.net/page/2
和分支预测一样,有时候你会采用一些试探性的方法去处理并发中产生的问题,例如经典的CAS Compare And Swap 算法,可能成功可能失败,喜忧参半。 Written by Hesey Wang in: 并发. Written by Hesey Wang in: 并发. Written by Hesey Wang in: 分布式. 你也可以在slideshare查看和下载 http:/ www.slideshare.net/heseymx/linux-io-scheduler. Written by Hesey Wang in: 技术. Written by Hesey Wang in: 分布式. Written by Hesey Wang in: 分布式. Written by Hesey Wang in: Linux. Public Key Infrastructure)设计,它默认认为 一台服务器 或者说一个IP 只会提供一个服务. Server Name Indication 定义在 RFC 4366. Written by Hesey Wang in: 技术.
舒の随想日记 » 数据库
http://blog.hesey.net/category/tech/database
Written by Hesey Wang in: 分布式. Written by Hesey Wang in: 技术. 最近正在召开QCon北京2011大会,趁此机会学习了一部分QCon大会的PPT,大会的PPT可以在QCon大会官网下载 http:/ www.qconbeijing.com/schedule.html. 讲师 淘宝核心系统数据库组 余锋 褚霸. 在技术方案的着眼点上,讲师主要强调了 通过高性能硬件支持平台,充分利用Cache 这一点在之后的演讲中多次强调 ,充分考虑容灾性. 随机数据和顺序数据分离,随机数据采用Direct IO 优点是CPU占用率小,适用于缓存命中率较低的文件 ,顺序数据通过缓存读。 对于InnoDB,分配尽可能大的Buffer Pool,日志数据分开存储,减少锁对多核CPU的影响 减小锁的开销 ,适时清除InnoDB产生的日志Cache。 Written by Hesey Wang in: 技术. Written by Hesey Wang in: 技术. Java CAS 和ABA问题 菜鸟飞翔. 我只是认真 聊聊工匠情怀 [zz] 程序员的信仰.
舒の随想日记 » 面向对象
http://blog.hesey.net/category/tech/object-oriented
Written by Hesey Wang in: 技术. Subtype polymorphism, almost universally called just polymorphism in the context of object-oriented programming, is the ability of one type, A, to appear as and be used like another type, B. 的区别,简单地说,只要是A类运用了extends关键字实现了对B类的继承,那么我们就可以说Class A是Class B的子类, 子类是一个语法层面上的词,只要满足继承的语法,就存在子类关系。 Written by Hesey Wang in: Java. Student stu = new Student(2010, "Hesey", 0, 10, "Software College");. Written by Hesey Wang in: Java. Java CAS 和ABA问题 菜鸟飞翔. 我只是认真 聊聊工匠情怀 [zz] 程序员的信仰.
舒の随想日记 » 技术
http://blog.hesey.net/category/tech
Jstat发现一个奇怪的现象,Eden Gen到了100%之后会持续好几秒,但Old Gen没有明显增大,说明并不是Eden Gen不够用promote到Old Gen了,感觉似乎是Young GC出了问题。 进一步查看GC Log,发现一次Young GC要1秒多,正常情况下20 30ms都应该结束了。 Times: user=0.23 sys=0.00, real=1.31 secs]. Written by Hesey Wang in: Java. If we could do things right for the first time, why not? Written by Hesey Wang in: Java. 3、如果在GC stop-the-world的时间里,rt飙高怎么办 (more…). Written by Hesey Wang in: Java. Written by Hesey Wang in: Java. 构造什么样的请求 构造的请求是否真实 构造的请求各种业务场景的配比 读写比例. Written by Hesey Wang in: 分布式.
舒の随想日记 » 架构
http://blog.hesey.net/category/tech/architecture
构造什么样的请求 构造的请求是否真实 构造的请求各种业务场景的配比 读写比例. Written by Hesey Wang in: 分布式. Written by Hesey Wang in: 分布式. Written by Hesey Wang in: 分布式. 最近正在召开QCon北京2011大会,趁此机会学习了一部分QCon大会的PPT,大会的PPT可以在QCon大会官网下载 http:/ www.qconbeijing.com/schedule.html. 讲师 淘宝核心系统数据库组 余锋 褚霸. 在技术方案的着眼点上,讲师主要强调了 通过高性能硬件支持平台,充分利用Cache 这一点在之后的演讲中多次强调 ,充分考虑容灾性. 随机数据和顺序数据分离,随机数据采用Direct IO 优点是CPU占用率小,适用于缓存命中率较低的文件 ,顺序数据通过缓存读。 对于InnoDB,分配尽可能大的Buffer Pool,日志数据分开存储,减少锁对多核CPU的影响 减小锁的开销 ,适时清除InnoDB产生的日志Cache。 Written by Hesey Wang in: 技术.
舒の随想日记 » 分布式
http://blog.hesey.net/category/tech/distributed
构造什么样的请求 构造的请求是否真实 构造的请求各种业务场景的配比 读写比例. Written by Hesey Wang in: 分布式. Written by Hesey Wang in: Java. Written by Hesey Wang in: 分布式. Written by Hesey Wang in: 分布式. Written by Hesey Wang in: 分布式. Written by Hesey Wang in: 分布式. S4 Simple Scalable Streaming System 最初是Yahoo! 目前该项目刚启动不久,所以也可以理解为是他们提出的一个分布式流计算 Distributed Stream Computing 的模型。 Written by Hesey Wang in: 分布式. Written by Hesey Wang in: 分布式. Java CAS 和ABA问题 菜鸟飞翔. 我只是认真 聊聊工匠情怀 [zz] 程序员的信仰. 2006 - 2016 Hesey (舒).
舒の随想日记 » Java
http://blog.hesey.net/category/tech/java
Jstat发现一个奇怪的现象,Eden Gen到了100%之后会持续好几秒,但Old Gen没有明显增大,说明并不是Eden Gen不够用promote到Old Gen了,感觉似乎是Young GC出了问题。 进一步查看GC Log,发现一次Young GC要1秒多,正常情况下20 30ms都应该结束了。 Times: user=0.23 sys=0.00, real=1.31 secs]. Written by Hesey Wang in: Java. If we could do things right for the first time, why not? Written by Hesey Wang in: Java. 3、如果在GC stop-the-world的时间里,rt飙高怎么办 (more…). Written by Hesey Wang in: Java. Written by Hesey Wang in: Java. Written by Hesey Wang in: Java. Written by Hesey Wang in: Java. Older Posts ».
舒の随想日记 » 并发
http://blog.hesey.net/category/tech/concurrent
Written by Hesey Wang in: Java. 和分支预测一样,有时候你会采用一些试探性的方法去处理并发中产生的问题,例如经典的CAS Compare And Swap 算法,可能成功可能失败,喜忧参半。 Written by Hesey Wang in: 并发. Written by Hesey Wang in: 并发. Written by Hesey Wang in: Java. Written by Hesey Wang in: 分布式. Java CAS 和ABA问题 菜鸟飞翔. 我只是认真 聊聊工匠情怀 [zz] 程序员的信仰. 2006 - 2016 Hesey (舒).
舒の随想日记 » 思考
http://blog.hesey.net/category/thinking
Written by Hesey Wang in: 思考. 这一瞬间让我想起93年 狮城舌战 的主角蒋昌建,在 人性本善还是人性本恶 的总结陈词最后,以顾城的名句, 黑夜给了我黑色的眼睛,我却用它寻找光明 ,把整个辩论赛的氛围推向高潮。 Written by Hesey Wang in: 思考. Written by Hesey Wang in: 思考. Written by Hesey Wang in: 思考. Written by Hesey Wang in: 思考. 语言只是程序开发相对低层的东西 与 底层 有所区别 ,语言就像工具,和扳手、钳子一样,会用它们只是干活的起始,语言又跟英语差不多,会说Hello World不代表你能用英语和人探讨人生哲学了,相反,语言是基本关,是程序设计的必要条件。 提出了那个经典的等式 Algorithms Data Structures = Programs. 事实上在程序设计、架构设计的过程中,很少会去考虑相关的语言细节 Don’t care for the implement, just design! Written by Hesey Wang in: 思考.
舒の随想日记 » Linux
http://blog.hesey.net/category/tech/linux
Jstat发现一个奇怪的现象,Eden Gen到了100%之后会持续好几秒,但Old Gen没有明显增大,说明并不是Eden Gen不够用promote到Old Gen了,感觉似乎是Young GC出了问题。 进一步查看GC Log,发现一次Young GC要1秒多,正常情况下20 30ms都应该结束了。 Times: user=0.23 sys=0.00, real=1.31 secs]. Written by Hesey Wang in: Java. Written by Hesey Wang in: Java. Written by Hesey Wang in: Linux. Sudo dpkg - get-selections app-backup-list.txt. Sudo cp -r [目标目录]. Written by Hesey Wang in: Linux. 进入 系统 首选项 键盘输入法 ibus deamon ,在 显示语言栏 中选择 活动时。 Written by Hesey Wang in: Linux. Written by Hesey Wang in: Linux.
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Coderrob - Hi, I'm Rob 'Coderrob' Lindley. - Coderrob.Web
Hi, I'm Rob. I'm a software developer. I do a lot of web development, and I do a ton of back-end work too. Honestly, I'm not sure what to call myself. full-stack developer? I usually just go by Coder Rob. I build digital things for both fun and? Prior to that I was working at a start-up based in Silicon Valley. Except I wasn't in the valley. Unless you count the Ohio river valley, which is a valley, but with way worse weather. I've been in the tech field a long time so if you ever want to cha...
An Android Coder
发表于 Jan 15 2016. 维基百科的定义 单元测试 又称为模块测试, Unit Testing 是针对程序模块 软件设计的最小单位 来进行正确性检验的测试工作。 在过程化编程中,一个单元就是单个程序、函数、过程等 对于面向对象编程,最小单元就是方法,包括基类 超类 、抽象类、或者派生类 子类 中的方法。 软件测试方法和技术 朱少民 清华大学出版社 2005年7月第一版. 发表于 Dec 10 2015. 在Android Application oncreate方法中注册回调,即可获取各个Activity的状态,square leakcanary工具即使用onActivityDestroyed回调 weakRefence refrenceQueue判断Activity有没有泄露. Activity activity, Bundle outState). Activity activity, Bundle savedInstanceState). Class T { private. SynchronizedPool T sPool = new. EdgeGravity int gravity;.
Roc`s 随想录
Object o1; / null. Object o2 = null. Object o3 = new. Object(); / not null. Node K,V e;. E = getNode(hash(key), key) = null. 无处不在,因此导致到处需要判空操作 or 处理空指针异常 NullPointerException。 转] Java instanceof 关键字是如何实现的. 链接 https:/ www.zhihu.com/question/21574535/answer/18998914. 在进入正题前先得提一句 既然楼主提问的背景是 被面试问到 ,那很重要的一点是揣摩面试官提问的意图。 比较安全的应对方法是请求面试官澄清/细化他的问题 他想要的 底层 底到什么程度。 Java语言的 意思 就已经是 底层。 15202 Type Comparison Operator instanceof. 当然这实际上回答的不是 如何实现的 ,而是 如何设计的。 T temp = (T) obj; / checkcast. ClassCastException e) {.
Beyond Otel - İzmir
HAVA DURUMU / İZMİR, TR. Representing Izmir's Future Rather Than Its Past. Çok keyif alacağınız bir otel :). Büyüleyici bir yer, mükemmel göre kalite-fiyat. Alsancak, İzmir - TÜRKİYE. 0 232 463 05 85. İletişim bilginizin bilgilendirme amaçlı kullanılmasına izin veriyor musunuz?
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May 25, 2012. What to do when Google PR0s your business. 8212; Tags: google. 8212; coderrr @ 3:59 pm. Matt Cutts seems to have confirmed. That this is just an issue with PR reporting and not an actual issue with our PR. He suggests only using the official Google Toolbar (for Internet Explorer) to check Page Rank. Which is one of the most recommended VPN service providers. Yesterday, we were a PR6 site with incoming links from TorrentFreak. 8211; We recently had a post published on Falkvinge.net. 8211; An...
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