1 class Province {  2     private int pid;  3     private String name;  4     private Stata stata;  5     private City citys [] ;  6     public void setStata(Stata stata){  7       this.stata=stata;  8       }  9     public Stata getStata(){ 10       return this.stata; 11       } 12     public void setCitys(City citys[]){ 13       this.citys=citys; 14       } 15     public City [] getCity(){ 16       return this.citys; 17       } 18     public Province (int pid,String name){ 19       this.pid=pid; 20       this.name=name; 21       } 22     public String getInfo(){ 23      return "省份ID："+pid+" , 名称："+name; 24      } 25 } 26 class City{ 27     private int cid; 28     private String cname; 29     private Province province; 30     private Stata stata; 31     public void setStata(Stata stata){ 32       this.stata=stata; 33       } 34     public Stata getStata(){ 35       return this.stata; 36       } 37     public void setProvince(Province province){ 38        this.province=province; 39        } 40     public Province getProvince(){ 41        return this.province; 42        } 43     public City(int cid,String cname){ 44     this.cid=cid; 45     this.cname=cname; 46     } 47     public String getInfo(){ 48     return "城市ID："+cid+",城市名称："+cname; 49     } 50 } 51 class  Stata { 52     private int id; 53     private String sname; 54     private Province prs [] ; 55     private City citys []; 56     public void setCitys(City citys [] ){ 57        this.citys=citys; 58        } 59     public City [] getCitys(){ 60        return this.citys; 61        } 62     public void setPrs(Province prs [] ){ 63       this.prs=prs; 64       } 65     public Province [] getPrs(){ 66       return this.prs; 67       } 68     public Stata(int id,String sname){ 69      this.id=id; 70      this.sname=sname; 71      } 72    public String getInfo(){ 73     return "国家ID："+id+"，国家名称："+sname; 74     } 75 } 76 public class dare 77 {public static void main(String args[]){ 78    City cd = new City(7,"南昌"); 79    City cc = new City(6,"宜春"); 80    City cb = new City(5,"广州"); 81    City ca = new City(4,"深圳"); 82    Province pb = new Province(3,"江西"); 83    Province pa = new Province(2,"广东"); 84    Stata st = new Stata(1,"中国"); 85    pa.setStata(st); 86    pb.setStata(st); 87    st.setPrs(new Province [] {pa,pb}); 88    cd.setProvince(pb); 89    cc.setProvince(pb); 90    cb.setProvince(pa); 91    ca.setProvince(pa); 92    pb.setCitys(new City[] {cd,cc}); 93    pa.setCitys(new City[] {cb,ca}); 94    cd.setStata(st); 95    cc.setStata(st); 96    cb.setStata(st); 97    ca.setStata(st); 98    st.setCitys(new City[] {cd,cc,cb,ca}); 99    System.out.println(ca.getStata().getInfo());100    System.out.println("***************开始取出数据****************");//通过国家查找全部对应省份信息101    for (int a =0;a<st.getPrs().length ;a++ ){102        System.out.println(st.getPrs()[a].getInfo());103    }104     System.out.println("***************开始取出数据****************");//通过国家查找全部城市信息 以及全部对应省份信息105    for (int b =0;b<st.getCitys().length ;b++ ){106        System.out.println(st.getCitys()[b].getInfo());107        System.out.println("\t|-"+st.getCitys()[b].getProvince().getInfo());108    }109   System.out.println("***************开始取出数据****************");//通过省份查找对应城市信息110    System.out.println(pa.getInfo());111    for (int x =0;x<pa.getCity().length ;x++ )112    {System.out.println(pa.getCity() [x].getInfo());113    }114    }115 }