printcolor

abstract void Printcolor ();}Then create a new Audi car sub-category:Public class Audi extends car { /* * Automotive Sub Audi * In the construction of Audi car configuration related information * */public Audi () {Super.setcolor ("white");} @Overridepublic void Printcolor () {//TODO auto-generated method StubSystem.out.println ("Audi Car Color:" +super.getcolor ());}}Then create a new decorato

"Design pattern Refinement" Learning notes (10) ------Strategy (policy) mode GoF : Define a series of algorithms, encapsulate them one by one, and allow them to replace each other. This mode allows the algorithm to vary independently from the customer who uses it. For example, in our system, we need to paint a graphic or a WordArt (such a system is in the real world, a bill output system made by my former company has this function). If we need a variety of colors of graphics or WordArt, t

to reuse the business logic code in Class components. First, we will introduce how to adapt to Mixin. The following is an example of Mixin: const someMixins={ printColor(){ console.log(this.state.color); } setColor(newColor){ this.setState({color:newColor}) } componentDidMount(){ .. }} The following is a component using Mixin: Class Apple extends react. component {// only for demonstration. mixins generally use react. createclass is cr

{BLUE, RED, YELLOW;} public class EnumTest {public void printColor (Color color) {switch (color) {case BLUE: System. out. println ("output blue! "); Break; case RED: System. out. println (" output RED! "); Break; case YELLOW: System. out. println (" output YELLOW! "); Break ;}} public static void main (String [] args) {EnumTest test = new EnumTest (); test. printColor (Color. BLUE); test.

basic data type before JDK1.5 can now be resolved. 4. Enumeration: Enumerations are the attributes that are needed in a comparison that JDK1.5 introduces. The keyword is an enumFor example: Define an enumeration representing traffic lights public enum myenum{ Red,green,yellow } 5. Variable parameters What does that mean? First, for example: Before JDK1.5, when we were going to pass multiple types of identical parameters for a method, we had two solutions, 1. Pass

= C.getfield ("color"); Field Numberfield = C.getfield ("number"); Reffield obj = new Reffield (); Colorfield.set (obj, "blue"); System.out.println ("color=" + colorfield.get (obj)); Numberfield.set (obj, 2.1); System.out.println ("number=" + numberfield.get (obj)); catch (SecurityException e) {//TODO auto-generated catch block E.printstacktrace ();} catch (Nosuchfieldexception e) { TODO auto-generated Catch block E.printstacktrace (); catch (IllegalArgumentException e) {//TODO auto-generated c

variables and the class attributes of the instance. Let's try again. Class Fruit: Price = 0 Def _ init _ (self ): Self. color = 'red' Zone = "china" If _ name __= = "_ main __": Print "Fruit price: % d" % Fruit. price Apple = Fruit () Print "apple price: % d" % apple. price Banane = Fruit () Print "banane price: % d" % banane. price Apple. price = 30 Fruit. price = 50 Print "apple price: % d" % apple. price Print "banane price: % d" % banane. price # Result Fruit price

Js deep learning-differences between js prototype constructor attributes In many js plug-ins, these two attributes are frequently used. I also used them when I write plug-ins myself. I know how to use them, but I don't know the specific differences. I have studied them today, Constructor returns the constructor of an object (type instance). attributes and methods added through prototype are not returned. Prototype returns a Type prototype that does not support post-dinner constructor. Example:

. Code examples//Flyweight.h#includestring>classflweightgraphicbase{ Public: Virtual voidPrintcolor () =0;protected: std::stringM_color;};classFlweightwhitegraphic: Publicflweightgraphicbase{ Public: Flweightwhitegraphic (); voidPrintcolor ();};classFlweightblackgraphic: Publicflweightgraphicbase{ Public: Flweightblackgraphic (); voidPrintcolor ();};//FlyweigtFactory.h#includestring>#include#includeclassflweightgraphicbase;classflyweightfactory{ Public: Std::shared_ptrstringScolor); voidSetfl

Js deep learning-differences between js prototype constructor attributes-jsconstructor In many js plug-ins, these two attributes are frequently used. I also used them when I write plug-ins myself. I know how to use them, but I don't know the specific differences. I have studied them today, Constructor returns the constructor of an object (type instance). attributes and methods added through prototype are not returned. Prototype returns a Type prototype that does not support post-dinner construct

1, JavaScript is often used in combination with HTML, use the following: A: B: 2, JavaScript does not have the concept of a block, all the variables in the function are global variables, even if you create in the IF, switch statements are also global variables, this is very different from other languages Such as: In the following example, the definition of color two times, which may cause some kind of error in other languages, but not in JS, but for the readability of the program, it is best n

typevoidPrintcolor (enumColor c) { Switch(c) { Casered:printf ("color:red (0x%08X) \ n", c); Break; Casegreen:printf ("color:green (0x%08X) \ n", c); Break; Caseblue:printf ("color:blue (0x%08X) \ n", c); Break; }}//Initializing DatavoidInitarray (intarray[]) { inti =0; for(i=0; i) {Array[i]= i +1; }}voidPrintArray (intarray[]) { inti =0; for(i=0; i) {printf ("%d\n", Array[i]); }}intMain () {enumColor C = GREEN;//define the variable C and initialize it to GREEN intArray[array_

(enumColor c) - { - Switch(c) - { + CaseRED: -printf"color:red (0x%08X) \ n", c); + Break; A CaseGREEN: atprintf"color:green (0x%08X) \ n", c); - Break; - CaseBLUE: -printf"color:blue (0x%08X) \ n", c); - Break; - } in } - to voidInitarray (intarray[]) + { - inti =0; the * for(i=0; i) $ {Panax NotoginsengArray[i] = i +1; - } the } + A voidPrintArray (intarray[]) the { + inti =0; - $

Print"Hello World";5Self::printnewline ();6 }7 8 Static functionPrintnewline () {9 Echo Php_eol;Ten } One } AHelloWorld::SayHello (); -HelloWorld::SayHello (); -?>4, constants of the class> Global constants defined with the Define functionThe constants of the > class are similar to static members, and they belong to the class itself, not to instances of the classThe constants of the > class are case-sensitivePHPclassMycolorenumclass {Const