Class Data or Attributes state of the application Methods or Functions have behavior Namespace is a container for related classes Assembly (DLL or EXE) is a container for related namespaces is a file which can either be a EXE or  a DLL Application in…

Java虚拟机可以处理的类型有两种,一种是原始类型(Primitive Types),一种是引用类型(Reference Types). 与之对应,也存在有原始值(Primitive Values)和引用值(Reference Values)两种类型的数值可用于变量赋值.参数传递.方法返回和运算操作. 原始类型与值 Java虚拟机支持的原始数据类型包括数值类型.布尔类型和returnAddress类型. 数值类型包括:整数类型和浮点类型. 整数类型包括: 1.byte 2.short 3.int…

No. Primitives Boxed Primitives 1 Have their own values Have identities distinct from their values 2 Have only fully functional values Have one nonfunctional value which is null 3 Time and space efficient Time and space inefficient Note Applying the…

A small coding test that I encountered today. Question Using only primitive types, implement a fixed-size hash map that associates string keys with arbitrary data object references (you don't need to copy the object). Your data structure should be op…

代码如下: var query = from s in db.LoginUserServices join ss in db.Services on s.ServiceType equals ss.Code into s_ss_join from s_ss in s_ss_join.DefaultIfEmpty() where s.LoginUserID.Equals(LoginUserID) select new { // ServiceType = s.ServiceType, Servic…

1. Primitive Types        Any data types the compiler directly supports are called primitive types.        Primitive types map directly to types existing in the Framework Class Library (FCL).        For the types that are compliant with the Common La…

1.Programming Language Primitive Types primitive types:Any data types the compiler directly supports. Primitive types map directly to types existing in the Framework Class Library (FCL). use the FCL type names and completely avoid the primitive type…

Primitive Data Types (The Java™ Tutorials > Learning the Java Language > Language Basics) https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html « Previous • Trail • Next » The Java Tutorials have been written for JDK 8. Examples a…

0 Java反射机制 反射(Reflection)是 Java 的高级特性之一,是框架实现的基础. 0.1 定义 Java 反射机制是在运行状态中,对于任意一个类,都能够知道这个类的所有属性和方法:对于任意一个对象,都能够调用它的任意一个方法和属性:这种动态获取的信息以及动态调用对象的方法的功能称为 Java 语言的反射机制. 一般而言,当用户使用一个类的时候,应该获取这个类,而后通过这个类实例化对象,但是使用反射则可以相反的通过对象获取类中的信息. 通俗的讲反射就是可以在程序运行的时候动态装载…

Use generic types to replace the object declaration Add one or more type parameters to its declaration. Replace all the uses of the type Object with the appropriate type parameter. Handle the new E[] errorwith two ways : Use the explicit type casting…