The collection list stores the list, traversing the object elements of the bottommost list.

1  PackageCom.wtd;2 3 Importjava.util.ArrayList;4 ImportJava.util.HashSet;5 ImportJava.util.Iterator;6 Importjava.util.List;7 ImportJava.util.Set;8 9  Public classL16 {Ten  One     /** A * @desc need to pass the list to another method how to use the list to traverse userlist and dplist?  -      * @paramargs -      * @throwsException the      */ -      Public Static voidMain (string[] args)throwsException { -         //TODO auto-generated Method Stub -List List =NewArraylist<arraylist>(); +User user=NewUser (); -User.setage (18); +User.setname ("Andi"); ADepartment department=NewDepartment (); atDepartment.setdepartid (7); -Department.setdepartname ("program"); -List<user> userlist =NewArrayList ();//used to receive data isolated from the database - userlist.add (user); -List<department> dplist =NewArrayList ();//used to receive data isolated from the database - Dplist.add (department); in List.add (userlist); - List.add (dplist); to getelement (list); +     } -      Public Static voidGetElement (List List)throwsexception{ the          for(Iterator Iterator =list.iterator (); Iterator.hasnext ();) { *ArrayList Listsmall =(ArrayList) Iterator.next (); $              for(Iterator Iterator2 =listsmall.iterator (); Iterator2.hasnext ();) {Panax NotoginsengObject objectsmall=Iterator2.next (); -String ClassName =Objectsmall.getclass (). GetName (); the                 if("Com.wtd.User". Equalsignorecase (ClassName)) {//Com.wtd.User +System.out.println ("classname.user=" +className); AUser usersmall=(User) Objectsmall; theSystem.out.println ("User.Name:" +usersmall.getname () + "\r\nuser.age:" +usersmall.getage ()); +}Else if("Com.wtd.Department". Equalsignorecase (ClassName)) { -System.out.println ("classname.department=" +classname);//com.wtd.Department $Department departmentsmall=(Department) Objectsmall; $System.out.println ("Department.departname:" +departmentsmall.getdepartname () + "\r\ndepartment.departid:" +Departmentsmall.getdepartid ()); -                 } -                  the             } -             Wuyi         } the          -     } Wu  - } About  $ classuser{ -     intAge ; - String name; -      Public intGetage () { A         returnAge ; +     } the      Public voidSetage (intAge ) { -          This. Age =Age ; $     } the      PublicString GetName () { the         returnname; the     } the      Public voidsetName (String name) { -          This. Name =name; in     } the      the } About  the classdepartment{ the     intDepartid; the String Departname; +      Public intGetdepartid () { -         returnDepartid; the     }Bayi      Public voidSetdepartid (intDepartid) { the          This. Departid =Departid; the     } -      PublicString Getdepartname () { -         returnDepartname; the     } the      Public voidsetdepartname (String departname) { the          This. Departname =Departname; the     } -      the}

Resolve the issue raised by this URL: http://q.cnblogs.com/q/79494/

The collection list stores the list, traversing the object elements of the bottommost list.