Big talk Design Pattern _ appearance Pattern

For example, you can purchase funds to indirectly buy stocks to earn income.

Package COM. WZS. design;/*** big talk design mode -- page105 appearance mode ** @ author administrator **/public class appearancemodel {public static void main (string [] ARGs) {fund = new fund (New stock1 (), new stock2 (), new stock3 (); fund. buyfund (); fund. sellfund () ;}}/** Fund */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;} // purchase fund public void buyfund () {stock1.buy (); stock2.buy (); stock3.buy ();} // sell fund 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 ;}/ ** stock */abstract class stock {public abstract void round (); public abstract void buy ();} /** stock 1 */class stock1 extends stock {@ overridepublic void buy () {system. out. println ("stock 1 buy. ") ;}@ overridepublic void upload () {system. out. println ("stock 1 sold. ") ;}}/** stock 2 */class stock2 extends stock {@ overridepublic void buy () {system. out. println ("stock 2 buy. ") ;}@ overridepublic void upload () {system. out. println ("stock 2 sell. ") ;}}/** stock 3 */class stock3 extends stock {@ overridepublic void buy () {system. out. println ("stock 3 buy. ") ;}@ overridepublic void upload () {system. out. println ("stock 3 sell. ");}}