fun programming projects java

Project ContentAfter some discussion, the final project was decided: design and development of simple drawing board projectGoalMake a drawing board that can draw a variety of graphics, and can have a variety of colors to choose from, you can also choose fonts when you enter text, can save, create new, and import picturesImplementation Plan 11 weeksComplete group division, and set initial design projects and goals12 weeksBuild the main architecture and

JAVA concurrent programming-Application When it comes to java multithreading, some people may have a big head. Many concepts are very understandable, but they do not know how to operate it when it comes to practice. Next we will talk about the multi-threaded application based on actual projects. Business Requirements:

I personally think that the ultimate test in Java programming is to master and use the classloader mechanism flexibly, especially in complex systems, such as dynamic class loading, reflect, EJB, and AOP. Class. forname ()And thread. currentthread (). getcontextclassloader ())Is it the same? In many articles, the two are considered the same. For example, an article in the

Xmldom_pull Programming:1. Remove the Welcome pop-up window interface: Enter "Configuration Center" in the Preferences option of the window item to find this item andTick the box and check it out.2. Remove the pop-up when opening myeclipse: Allow Subclipse team to receive ... Way:Windows-->preferences-->general-->startup and shutdown--> cancel subclipse Usage Reporting check boxMyEclipse8.51, the Configuration workspace-----recommended not to use the

features and terminology, such as introduction (Introduction), which introduces interfaces/methods/domains to existing classes-which greatly broadens the imagination of developers. However, this article only introduces some of the most basic features, familiar with the concepts introduced here, you go into the other characteristics of AOP, and see how to use them in your development environment. 　　Iii. Existing Framework The most mature, functionally rich AOP framework of the time ASPECTJ,ASPEC

Introduction to Object OrientationObject-oriented programming is a programmatic approach that needs to be implemented using classes and objects. Class that describes the common characteristics of multiple objects, which are templates for objects. Object that describes an individual in the real world, which is an instance of a class. definition of ClassClass class Name {//attribute data type variable name ...//method modifier return v

traverse the map instead of Keyset+get (actually traversing two times). Although the map get method is "fast", it can't be wasted!See "KeySet and EntrySet traverse hashmap performance Differences" for related information.EntrySet Simplified Syntax (Java 8 functional programming):1 New Hashmap(); 2 Map.foreach (key, value), {3 ... 4 });"Case 8"1 Private Double [] Devanningarray (List origin) {2 doubl

main method in each class, makes unit tests for each class simple and easy. And after you complete the unit test, you don't have to delete main (), which you can leave for the next test.5) Even if a class has only package access, its public main () is still accessible. (not confirmed yet?) ）6) In order to inherit, the general rule is that all data members are designated as Private, all methods are specified aspublic (the protected method can also be accessed with the help of an export class, as

Java programming ideology (iii) -- access permission Control Modifier that you didn't pay attention to before. Generally, it is not added before the variable. One is not helpful, and the other is lazy, the difference between private and public projects will be large in the future. (1) first, the package name When using a class, such as a collection class, you ne

Most good designers avoid the plague by avoiding the use of implementation inheritance (extends relationship). In fact, 80% of the code should be written entirely with interfaces, not through extends. The "Java Design pattern" book details how to use interface inheritance instead of implementing inheritance. This article describes why designers do this.Extends is harmful, perhaps not for Charles Manson at this level, but bad enough it should be avoide

. } } 5, the name of the screen. If the base class for Java already has a method name that has been overloaded multiple times (different argument lists). Redefining the method name in the export class does not mask any versions of it in the base class. As a result, the overloaded mechanism works fine, either at the layer or its base class Squadron method.@override annotations are added to the Java