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Commitfc6e5e5

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design pattern: strategy pattern
1 parent55b8d0b commitfc6e5e5

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9 files changed

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packagelearnHeadFirstDesignPatterns.chapter_1_strategy_pattern;
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publicinterfaceCookBehavior {
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publicvoidcook();
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}
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packagelearnHeadFirstDesignPatterns.chapter_1_strategy_pattern;
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publicclassCookNoodlesBehaviorimplementsCookBehavior {
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@Override
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publicvoidcook() {
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System.out.println("I'm also fond of cooking Chinese noodles!");
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}
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}
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packagelearnHeadFirstDesignPatterns.chapter_1_strategy_pattern;
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publicclassCookRiceFlourimplementsCookBehavior {
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@Override
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publicvoidcook() {
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System.out.println("I'm cooking MiFen, aka, Rice Flour.");
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}
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}
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packagelearnHeadFirstDesignPatterns.chapter_1_strategy_pattern;
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publicinterfaceLoveBehavior {
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publicvoidshowLove();
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}
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packagelearnHeadFirstDesignPatterns.chapter_1_strategy_pattern;
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publicclassLoveHusbandBehaviorimplementsLoveBehavior {
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@Override
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publicvoidshowLove() {
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System.out.println("I love my husband Steve Sun, he is just awesome!");
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}
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}
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packagelearnHeadFirstDesignPatterns.chapter_1_strategy_pattern;
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publicclassModelWifeextendsWife {
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publicModelWife() {
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loveBehavior =newLoveHusbandBehavior();
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cookBehavior =newCookRiceFlour();
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}
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}
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packagelearnHeadFirstDesignPatterns.chapter_1_strategy_pattern;
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publicclassRealWifeextendsWife {
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publicRealWife() {
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System.out.println("I'm the real wife - Sophie Yan! I'm Sophie Yan, the wife of Steve Sun, and I like cooking for my husband and family. ");
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this.cookBehavior =newCookRiceFlour();
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this.loveBehavior =newLoveHusbandBehavior();
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}
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}
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packagelearnHeadFirstDesignPatterns.chapter_1_strategy_pattern;
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/**
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* The Strategy Pattern defines a family of algorithms, encapsulates each one, and makes them interchangeable.
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* Strategy lets the algorithm vary independently from clients that use it.*/
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/**Design principle:
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* Favor composition over inheritance.
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*
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* Not only does it let you encapsulate a family of algorithms into their own set of classes, but it also lets you change behavior at runtime.*/
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publicclassStrategtyPatternTestDrive {
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publicstaticvoidmain(String[]args) {
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Wifewife =newRealWife();
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wife.performLove();
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wife.performCook();;
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wife.setCookBehavior(newCookNoodlesBehavior());
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wife.performCook();
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}
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}
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packagelearnHeadFirstDesignPatterns.chapter_1_strategy_pattern;
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publicabstractclassWife {
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CookBehaviorcookBehavior;
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LoveBehaviorloveBehavior;
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publicWife () {
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System.out.println("I'm the abstract wife - Sophie Yan!");
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};
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publicvoidsetCookBehavior(CookBehaviorcb){
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cookBehavior =cb;
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}
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publicvoidsetLoveBehavior(LoveBehaviorlb){
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loveBehavior =lb;
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}
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publicvoidperformCook(){
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cookBehavior.cook();
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}
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publicvoidperformLove(){
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loveBehavior.showLove();
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}
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}

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