Big talk Design Pattern _ combination pattern

Use a system as an example for branch offices under the company.

Package COM. WZS. design; import Java. util. arraylist; import Java. util. list;/*** big talk design mode -- page194 combination mode ** @ author administrator **/public class compositemode {public static void main (string [] ARGs) {concretecompany root = new concretecompany ("Beijing Head Office"); root. add (New hrdepartment ("Head Office Human Resources Department"); root. add (New financedepartment ("Head Office Finance Department"); concretecompany comp = new concretecompany ("Shanghai East China Branch"); comp. add (New hrdepartment ("Shanghai East China Branch Human Resources Department"); comp. add (New financedepartment ("Shanghai East China Branch Finance Department"); root. add (COMP); concretecompany comp1 = new concretecompany ("Nanjing Office"); comp1.add (New hrdepartment ("Nanjing Office Human Resources Department ")); comp1.add (New financedepartment ("Nanjing Office Finance Department"); comp. add (comp1); concretecompany comp2 = new concretecompany ("Hangzhou Office"); comp2.add (New hrdepartment ("Hangzhou Office Human Resources Department ")); comp2.add (New financedepartment ("Hangzhou Office Finance Department"); comp. add (comp2); system. out. println ("structure:"); root. display (1); system. out. println ("Responsibility:"); root. lineofduty () ;}}// COMPANY Abstract class company {public string name; Public Company (string name) {This. name = Name;} public abstract void add (Company); // Add public abstract void remove (Company); // remove public abstract void display (INT depth ); // display public abstract void lineofduty (); // perform duties} // The company class concretecompany extends company {private list <company> Children = new arraylist <company> (); public concretecompany (string name) {super (name) ;}@ overridepublic void add (Company) {children. add (company) ;}@ overridepublic void display (INT depth) {system. out. println (mystring. createstring ("-", depth) + "" + this. name); For (Company: Children) {company. display (depth + 2) ;}@overridepublic void lineofduty () {for (Company: Children) {company. lineofduty () ;}@overridepublic void remove (Company) {children. remove (company) ;}// HR department class hrdepartment extends company {public hrdepartment (string name) {super (name) ;}@ overridepublic void add (Company) {}@ overridepublic void display (INT depth) {system. out. println (mystring. createstring ("-", depth) + "" + this. name) ;}@ overridepublic void lineofduty () {system. out. println (this. name + "Employee Recruitment and Training Management. ") ;}@ overridepublic void remove (Company) {}} // Finance Department class financedepartment extends company {public financedepartment (string name) {super (name );} @ overridepublic void add (Company) {}@ overridepublic void display (INT depth) {system. out. println (mystring. createstring ("-", depth) + "" + this. name) ;}@ overridepublic void lineofduty () {system. out. println (this. name + "company financial revenue and expenditure management. ") ;}@ overridepublic void remove (Company) {}}/** create character prefix */class mystring {public static string createstring (string STR, int depth) {string strtemp = ""; for (INT I = 0; I <depth; I ++) {strtemp + = STR;} return strtemp ;}}