package mode.bulider;/*** * 首先是汽車，組成零件有：玻璃、輪胎、發動機；他們都是抽象的概念，所以用抽象類來創建* * */ public class Car {Glass glass;Wheel wheel;Engine engine; }

package mode.bulider; /*** * 抽象的玻璃* * */ public abstract class Glass {}

下面是兩個具體的玻璃類

package mode.bulider;public class AmericanGlass extends Glass {public String toString() {return "\"American Glass\"";} }
package mode.bulider;public class JapaneseGlass extends Glass {public String toString() {return "\"Japanese Glass\"";} }

package mode.bulider; /*** * 抽象的輪胎* * */ public abstract class Wheel {}

下面是兩個具體的輪胎類

package mode.bulider;public class AmericanWheel extends Wheel {public String toString() {return "\"American Wheel\"";} }
package mode.bulider;public class JapaneseWheel extends Wheel {public String toString() {return "\"Janpanes Wheel\"";} }

package mode.bulider; /*** * 抽象的發動機* * */ public abstract class Engine {}

下面是兩個具體的發動機類

package mode.bulider;public class ChineseEngine extends Engine {public String toString() {return "\"Chinese Engine\"";} }
package mode.bulider;public class FranceEngine extends Engine {public String toString() {return "\"France Engine\"";} }
package mode.bulider;/*** * 創建一個汽車的構造器* * */ public interface CarBuilder {public void buildGlass();public void buildWheel();public void buildEngine();public Car getProduct(); }
下面是兩個具體的實現

package mode.bulider;public class CarABuilder implements CarBuilder {private Car product = null;public CarABuilder() {product = new Car();}@Overridepublic void buildGlass() {product.glass = new AmericanGlass();}@Overridepublic void buildWheel() {product.wheel = new AmericanWheel();}@Overridepublic void buildEngine() {product.engine = new ChineseEngine();}@Overridepublic Car getProduct() {buildGlass();buildEngine();buildWheel();return product;}}
package mode.bulider;public class CarBBuilder implements CarBuilder {private Car product;public CarBBuilder() {product = new Car();}@Overridepublic void buildGlass() {product.glass = new JapaneseGlass();}@Overridepublic void buildWheel() {product.wheel = new JapaneseWheel();}@Overridepublic void buildEngine() {product.engine = new FranceEngine();}@Overridepublic Car getProduct() {buildEngine();buildGlass();buildWheel();return product;}}
package mode.bulider;/*** * 構造器引導措施* * */ public class Director {private CarBuilder builder;public Director(CarBuilder builder) {this.builder = builder;}public Car Construct() {return builder.getProduct();} }

測試

package mode.bulider;public class Test {public static void main(String[] args) {Director d1 = new Director(new CarABuilder());Director d2 = new Director(new CarBBuilder());d1.Construct();d2.Construct();} }

總結

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