大话设计模式_外观模式

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通过买基金来间接买股票获得收入为例。

package com.wzs.design;/** * 大话设计模式--page105 外观模式 *  * @author Administrator *  */public class AppearanceModel {public static void main(String[] args) {Fund fund = new Fund(new Stock1(), new Stock2(), new Stock3());fund.buyFund();fund.sellFund();}}/* * 基金 */class Fund {private Stock1 stock1;private Stock2 stock2;private Stock3 stock3;public Fund(Stock1 stock1, Stock2 stock2, Stock3 stock3) {this.stock1 = stock1;this.stock2 = stock2;this.stock3 = stock3;}// 买基金public void buyFund() {stock1.buy();stock2.buy();stock3.buy();}// 卖基金public void sellFund() {stock1.sell();stock2.sell();stock3.sell();}public Stock1 getStock1() {return stock1;}public void setStock1(Stock1 stock1) {this.stock1 = stock1;}public Stock2 getStock2() {return stock2;}public void setStock2(Stock2 stock2) {this.stock2 = stock2;}public Stock3 getStock3() {return stock3;}public void setStock3(Stock3 stock3) {this.stock3 = stock3;}}/* * 股票 */abstract class Stock {public abstract void sell();public abstract void buy();}/* * 股票1 */class Stock1 extends Stock {@Overridepublic void buy() {System.out.println("股票1买入.");}@Overridepublic void sell() {System.out.println("股票1卖出.");}}/* * 股票2 */class Stock2 extends Stock {@Overridepublic void buy() {System.out.println("股票2买入.");}@Overridepublic void sell() {System.out.println("股票2卖出.");}}/* * 股票3 */class Stock3 extends Stock {@Overridepublic void buy() {System.out.println("股票3买入.");}@Overridepublic void sell() {System.out.println("股票3卖出.");}}