arraylist

问题 What i'm trying to do is to send and ArrayList through a socket from Android client to Java server. Here is the code of client which sends the ArrayList : private void sendContacts(){ AppHelper helperClass = new AppHelper(getApplicationContext()); final ArrayList<Person> list = helperClass.getContacts(); System.out.println("Lenght of an contacts array : " +list.size()); // for (Person person : list) { // System.out.println("Name "+person.getName()+"\nNumber "+ person.getNr()); // } handler

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . I am getting data from the two different databases and storing them in the java.util.List Elements of database:1 column 1 column 2 **Investment Number** Investment Name 123 abcwe 124 agsdf 454 lkjcv 784 ojncv 478 hfdgh 852 qweyu 745 mmkty 201 pbckl 560 jklfg 741 nbvbn storing them in list1 Elements of database:2

问题 I have Unmanaged C# DLL: [DllExport(ExportName = "GetStudentsList", CallingConvention = CallingConvention.StdCall)] static public List<StudentsStruct>GetStudentsList() { return List<StudentsStruct>; } [DllExport(ExportName = "maxElement", CallingConvention = CallingConvention.StdCall)] static public int maxElement(int a, int b) { return c; } I want to return List<StudentsStruct> from the function. And I want to run above function in a C++ Application: using GetStudentsListFn = List

问题 I am trying to sort the category arraylist with Collections.sort method but have no luck with it. Here is my code: public class Categories implements Parcelable { private ArrayList<Category> category; private Recent recent; public ArrayList<Category> getCategories() { return this.category; } public void setCategory(ArrayList<Category> category) { this.category = category; } public Recent getRecent() { return this.recent; } public void setRecent(Recent recent) { this.recent = recent; }

问题 I am trying to sort the category arraylist with Collections.sort method but have no luck with it. Here is my code: public class Categories implements Parcelable { private ArrayList<Category> category; private Recent recent; public ArrayList<Category> getCategories() { return this.category; } public void setCategory(ArrayList<Category> category) { this.category = category; } public Recent getRecent() { return this.recent; } public void setRecent(Recent recent) { this.recent = recent; }

问题 I have a database server communicating with a Java application server using JDBC. I want to store data from the database ResultSet into Java variables. Here's my Java class, HRPeople: public class HRPeople { public int elements; public String[] FirstName; public String[] LastName; public String[] Email; public int[] Salary; } I currently use this class to store data from ResultSet, as follows: query = "SELECT first_name, last_name, email, salary FROM HR.Employees where rownum < 6"; rset =

问题 I want to store the data in a ArrayList and access it in another class,but when when I access the arraylist ,the arraylist.size() is 0.Means I didn't access the same arraylist. Somebody please tell me what I doing wrong. Here is my POJO class public class item { private String name; private String body; private String profileImage; public Item(){ } public Item(String body,String name,String profileImage){ this.body = body; this.name = name; this.profileImage = profileImage; } //Getter and

问题 This question already has answers here : Randomize a List<T> (19 answers) Closed 6 years ago . I need to print numbers from 1 to 50 in random order without repeating it . static void Main(string[] args) { ArrayList r = new ArrayList(); Random ran = new Random(); for (int i = 0; i < 50; i++) { r.Add(ran.Next(1,51)); } for (int i = 0; i < 50; i++) Console.WriteLine(r[i]); Console.ReadKey(); } 回答1: All you need to do is this check if the number already exists in the list and if so get another

问题 This question already has answers here : Randomize a List<T> (19 answers) Closed 6 years ago . I need to print numbers from 1 to 50 in random order without repeating it . static void Main(string[] args) { ArrayList r = new ArrayList(); Random ran = new Random(); for (int i = 0; i < 50; i++) { r.Add(ran.Next(1,51)); } for (int i = 0; i < 50; i++) Console.WriteLine(r[i]); Console.ReadKey(); } 回答1: All you need to do is this check if the number already exists in the list and if so get another

问题 Following are some snippets from a jsp page: <%! ArrayList songList = new ArrayList<String>(); %> <% songList = StoreSongLink.linkList; // linkList is a static variable in the class StoreSongLink // There the linkList is defined as public static ArrayList<String> linkList = new ArrayList<String>(); %> <%} else { for (ArrayList<String> list : songList){} %> The code inside the else srciplet produces an error required java.util.ArrayList<String> found java.lang.Object . Why is this ? I do not