Part 48 Difference between Types and Type Members Part 49 Access Modifiers in C# Part 50 Internal and Protected Internal Access Modifiers in C# Part 51 Access Modifiers for types…

来自:http://www.jesperdj.com/2016/01/08/scala-access-modifiers-and-qualifiers-in-detail/ Just like Java and other object-oriented programming languages, Scala has access modifiers to restrict access to members of classes, traits, objects and packages.…

Access Levels Modifier Class Package Subclass World public Y Y Y Y protected Y Y Y N no modifier Y Y N N private Y N N N The following table shows where the members of the Alpha class are visible for each of the access modifiers that can be applied t…

总结1.modifier 改性剂 修饰符 修饰语 调节器access modifier 访问修饰符 存取权限 存取修饰词 存取修饰字官网“can”Access level modifiers determine whether other classes can use a particular field or invoke a particular method. There are two levels of access control:是否允许2.2个方面类的存取修饰词方法的存取修饰词…

hadoop集群性能低下的常见原因 (一)硬件环境 1.CPU/内存不足,或未充分利用 2.网络原因 3.磁盘原因 (二)map任务原因 1.输入文件中小文件过多,导致多次启动和停止JVM进程.可以设置JVM重用. 2.数据倾斜:大文件且不可分割,导致处理这些文件的map需要很长时间. 3.数据本地化效果差. (三)reduce任务的原因 1.reduce任务数量过大或过小 2.数据倾斜:一部分key的记录数量太大,导致某些reduce执行过慢 3.缓慢的shuffle和排序 (四)hadoop…

所有规则的翻译(基于版本4.7.44.0): 文档规则 1.SA1600:ElementsMustBeDocumented元素必须添加注释 2.SA1601: PartialElementsMustBeDocumented   Partial修饰的成员必须添加注释 3.SA1602:EnumerationItemsMustBeDocumented 枚举必须添加注释 4.SA1603: DocumentationMustContainValidXml  注释必须合法(注释中的关键字不能有错误) 5…

Nested classes are further divided into two types: static nested classes: If the nested class is static, then it’s called static nested class. Static nested classes can access only static members of the outer class. Static nested class is same as any…

在StyleCop中有一些官方自己写好的检测规则下面就是英文的解释 文档规则 1.SA1600:ElementsMustBeDocumented元素必须添加注释 2.SA1601: PartialElementsMustBeDocumented   Partial修饰的成员必须添加注释 3.SA1602:EnumerationItemsMustBeDocumented 枚举必须添加注释 4.SA1603: DocumentationMustContainValidXml  注释必须合法(注释中的…

转载:https://greenrobot.me/devpost/android-parcelable-serializable/ 进行Android开发的时候,我们都知道不能将对象的引用传给Activities或者Fragments,我们需要将这些对象放到一个Intent或者Bundle里面,然后再传递.通过Android的API,我们知道有两种选择,即在传递对象时,需要对我们的对象进行 Parcelable 或者Serializable化.作为Java开发者,相信大家对Serializabl…

In this tutorial we will discuss about different types of questions that can be used in a Java interview, in order for the employer to test your skills in Java and object-oriented programming in general. In the following sections we will discuss abou…