Javaoo 14 16 Chapters

Multithreaded programming

There are two types of multitask processing

Process-based features: Allows the computer to run two or more programs at the same time

Threads are the smallest processing unit in a thread-based multi-task processing environment

Process refers to a "self-containment" of the running program, with its own address space

Less overhead required for thread-based

In multitasking, individual processes need to allocate their own separate address space

Multiple threads can share the same address space and share the same process together

How to create a thread: 1. Write a class that inherits the thread class, and then override the run () method of the thread class in the class

2. Write a class to implement the Runnable interface, and then associate an instance of the class with the Java.lang.Thread object

Priority: Minimum 1 up to 10 default 5

Java Graphical interface programming

Peers is a local GUI component that is manipulated by AWT peers is invisible to program developers

Weight component: AWT: Coarse, unsightly

Platform inconsistency, "one-time programming, debugging Everywhere"

A program that is less efficient and unsuitable for complex interfaces

Development speed is relatively fast

Lightweight components: Swing: A richer, more convenient collection of user interface elements

Less reliance on the underlying platform and fewer bugs on the platform

A consistent feeling for users on different platforms

Swing components are mostly lightweight components with no peer components

Swing does not replace AWT completely

Component three elements: 1. Content 2. Appearance display 3. Behavior

Swing uses MVC (model-view-control) Design Patterns

The basic idea of MVC divides a GVI component into three parts:

Model section-Store content

View section-Show content

Control section-handling user events

Boderlayout: Divided into 5 districts,

Javaoo 14 16 Chapters