Java Class (multiple 1-to-many mappings)

1 classProvince {2     Private intpid;3     PrivateString name;4     PrivateStata Stata;5     PrivateCity Citys [];6      Public voidSetstata (Stata Stata) {7        This. stata=Stata;8       }9      PublicStata Getstata () {Ten       return  This. Stata; One       } A      Public voidSetcitys (city citys[]) { -        This. citys=Citys; -       } the      PublicCity [] getcity () { -       return  This. Citys; -       } -      PublicProvince (intpid,string name) { +        This. pid=pid; -        This. name=name; +       } A      PublicString GetInfo () { at      return"Province ID:" +pid+ ", Name:" +name; -      } - } - classcity{ -     Private intCID; -     PrivateString cname; in     PrivateProvince Province; -     PrivateStata Stata; to      Public voidSetstata (Stata Stata) { +        This. stata=Stata; -       } the      PublicStata Getstata () { *       return  This. Stata; $       }Panax Notoginseng      Public voidSetprovince (province province) { -         This. province=Province; the        } +      PublicProvince Getprovince () { A        return  This. Province; the        } +      PublicCity (intcid,string CNAME) { -      This. cid=CID; $      This. cname=cname; $     } -      PublicString GetInfo () { -     return"City ID:" +cid+ ", City Name:" +cname; the     } - }Wuyi classStata { the     Private intID; -     PrivateString sname; Wu     Privateprovince PRs []; -     PrivateCity Citys []; About      Public voidSetcitys (city Citys []) { $         This. citys=Citys; -        } -      PublicCity [] Getcitys () { -        return  This. Citys; A        } +      Public voidSetprs (province PRs []) { the        This. prs=PRs; -       } $      PublicProvince [] Getprs () { the       return  This. PRs; the       } the      PublicStata (intid,string sname) { the       This. id=ID; -       This. sname=sname; in      } the     PublicString GetInfo () { the     return"Country ID:" +id+ ", Country name:" +sname; About     } the } the  Public classDare the{ Public Static voidMain (String args[]) { +City CD =NewCity (7, "Nanchang"); -City cc =NewCity (6, "Yichun"); theCity cb =NewCity (5, "Guangzhou");BayiCity CA =NewCity (4, "Shenzhen"); theProvince PB =NewProvince (3, "Jiangxi"); theProvince PA =NewProvince (2, "Guangdong"); -Stata st =NewStata (1, "China"); - Pa.setstata (ST); the Pb.setstata (ST); theSt.setprs (NewProvince [] {PA,PB}); the cd.setprovince (pb); the cc.setprovince (pb); - Cb.setprovince (PA); the Ca.setprovince (PA); thePb.setcitys (Newcity[] {cd,cc}); thePa.setcitys (Newcity[] {cb,ca});94 Cd.setstata (ST); the Cc.setstata (ST); the Cb.setstata (ST); the Ca.setstata (ST);98St.setcitys (Newcity[] {cd,cc,cb,ca}); About System.out.println (Ca.getstata (). GetInfo ()); -System.out.println ("*************** begins to take out data ****************");//find all relevant provinces by country101     for(intA =0;a<st.getprs (). length; a++ ){102 System.out.println (St.getprs () [A].getinfo ());103    }104System.out.println ("*************** begins to take out data ****************");//Find all city information and all corresponding province information through the country the     for(intb =0;b<st.getcitys (). length; b++ ){106 System.out.println (St.getcitys () [B].getinfo ());107System.out.println ("\t|-" +st.getcitys () [B].getprovince (). GetInfo ());108    }109System.out.println ("*************** begins to take out data ****************");//Find city information by province the System.out.println (Pa.getinfo ());111     for(int× =0;x<pa.getcity (). length; x + + ) the {System.out.println (pa.getcity () [X].getinfo ()];113    } the    } the}

Java Class (multiple 1-to-many mappings)