Objectives of the Reference Types is introduce reference types (class, array); discuss details of use (declaration, allocation, assignment, null, parameter, aggregation); introduce garbage collection and something else.
Advanced features in C# presents about Attributes; Delegates & Events; Anonymous Types & Dynamic Type; Extension Methods; Lambda Expressions; Reflection; Preprocessor Directives; Garbage Collection; Q&A of the Advanced features in C#.
Chapter 11 - Memory management. This chapter discusses the implementation of dynamic arrays and other objects using conventional techniques for managing heap memory. Especially important in this context is the notion of heap overflow, along with strategies for dealing with heap overflow when it occurs at run time. We discuss three key algorithms for heap memory management, which are affectionately known as garbage collection algorithms.
Java is interpreted, and garbage collected: C++ has more potential for memory leaks (you must explicitly delete objects) Java intended to be explicitly platform independent • Similarities in syntax. See Gary Shute’s document on Java for C Programmers (available from course calendar)
Introducing the Microsoft .NET Platform
in use, these objects will always have a reference count greater than zero, so unless they are implicitly deconstructed, their memory may never be recovered. For a C or C++ programmer—accustomed to ensuring that objects are properly destroyed, essentially managing memory on their own—this sounds perfectly normal, and a good reason for not trusting anyone else to take care of managing resources. However, in the .NET environment, Microsoft is striving to make developing software easier. Later in this chapter, we cover a how .
Removing Event Listeners
Garbage Collection: A Recommended Optional Parameter for Event Listeners
Garbage collection is the method by which Flash Player purges from memory objects that you no longer need. Garbage collection and memory management typically are not topics you need to concern yourself with when just getting started with ActionScript 3.0. However, garbage collection frees up memory so it’s available for your SWF to use throughout its runtime life, so it’s a good thing to be aware of.
Chapter I Framework and C# Overview
Part 1: NET Framework
1. 2. 3. 4. 5.
CLR, FCL, CTS Namespace Managed code Garbage collection .NET framework architecture
Part 2: C# overview
.NET 3.5 (Nov-2007) VS.NET 2008 Default: Windows 7
.NET 2.0 (Nov-2005) VS.NET 2005 .NET 3.0 (Nov-2006) Default: Windows Vista, Server 2008 .NET 1.1 (Apr-2003) VS .NET 2003 Default: Server 2003
What is the .NET framework
The global cost of communicable diseases is expected to rise. SARS has
put the world on alert. We have now Avian Flu on the watch. Recognizing
the global nature of threats posed by new and re-emerging infectious diseases
and the fact that many recent occurrences originated in the Asia Pacific
regions, there has been an increased interest in learning and knowing
about disease surveillance and monitoring progresses made in these regions.
Such knowledge and awareness is necessary to reduce conflict, discomfort,
tension and uneasiness in future negotiations and global cooperation....
The servlet is constructed, then initialized with the
Any calls from clients to the service method are
The servlet is taken out of service, then destroyed
with the destroy method, then garbage collected
and finalized.GenericServlet implements the Servlet and
It provides simple versions of the lifecycle methods
init and destroy and of the methods in the
This module provides students with the knowledge and skills to manage and
restore the Active Directory directory service database.
At the end of this module, students will be able to:
Describe the importance of maintaining the Active Directory database.
Describe the process of modifying data in Active Directory.
Describe the garbage collection process in Active Directory.
Back up the system state data by using the Backup utility.
Restore Active Directory by restoring the system state data.
Move the Active Directory database to a new location.
Defragment the Active Directory database.
ADO.NET is a large set of .NET classes that enable us to retrieve and manipulate data, and update data sources, in very many different ways. As an integral part of the .NET framework, it shares many of its features: features such as multi-language support, garbage collection, just-in-time compilation, object-oriented design, and dynamic caching, and is far more than an upgrade of previous versions of ADO.
Thu dọn “rác” (Garbage collection) cải tạo hoặc làm trống bộ nhớ đã định vị cho các đối tượng mà các đối tượng này không sử dụng trong thời gian dài. Trong ngôn ngữ lập trình hướng đối tượng khác như C++, lập trình viên phải làm cho bộ nhớ trống mà đã không được yêu cầu trong thời gian dài.
In many ways the .Net platform has asked ìwhat do developers waste time doingî
and tried to improve developer performance. For example, the .NET virtual
machine provides memory management, a task that takes up much developer time
when it has to be done manually. A large and well-documented class library helps
avoid re-inventing the same wheel many times over. Inter-operability between code
in a number of languages is made trivial.
The C# language was created alongside the .NET platform. Itcould be considered the ìnativeî language of .
Garbage Collection Garbage collector là một thành phần quản lí bộ nhớ của .NET, nó là một đáp án cho việc thu hồi bộ nhớ của các chương trình thực thi. Từ trước đến giờ có hai công nghệ được sử dụng cho việc huỷ bộ nhớ trong Windows, những tiến trình này được yêu cầu từ hệ thống.
Waste incinerators fall somewhere between the two
categories of incidental and deliberate emissions. Similar
to a coal plant, they burn a feedstock — in this case
garbage — and mercury is released as an incidental
emission. The difference is that most of the incidental
emissions from waste incinerators are a result of mercury
that is deliberately put into products. These may include
fluorescent lamps, old batteries, dental office waste, electrical
switches or thermostats.
Developed by Sun Microsystems (James Gosling)
A general-purpose object-oriented language
Based on C/C++
Designed for easy Web/Internet applications
fixes some clumsy features of C++
automatic garbage collection
rich pre-defined class library
focus on the data (objects) and methods manipulating the data
all functions are associated with objects
almost all data types are objects (files, strings, etc.)
potentially better code organization and reuse...
The Java standard APIs are shown in HTML output at http://java.sun.com/j2se/1.4.2/docs/api/index.html. It’s generated from the documentation comments (doc comments).
Documentation comments are special comments in the source code that are delimited by the /** ... */ delimiters.
The JDK contains a tool named javadoc to generate HTML documentation from documentation comments in your source file. The javadoc utility extracts information for the following items
Public classes and interfaces
Public and protected methods
Public and protected fields
This book starts with an introduction to the core concepts of .NET memory management and garbage collection, and then quickly layers on additional details and intricacies. Once you're up to speed, you can dive into the guided troubleshooting tour, and tips for engineering your application to maximise performance. And to finish off, take a look at some more sophisticated considerations, and even a peek inside the Windows memory model.
Bài giảng Lập trình Windows - Tổng quan .Net , ngôn ngữ C# trình bày các nội dung: Giới thiệu .NET Framework (CLR, CTS, CLS, MSIL…, garbage collection, namespace), tổng quan ngôn ngữ C#. Mời các bạn cùng tham khảo nội dung chi tiết.