How do I populate a JComboBox with an ArrayList

Question

I need to populate a JComboBox with an ArrayList   Is there any way to do this

User · Answer

Elegant way to fill combo box with an array list    List lt String gt  ls   new ArrayList lt String gt      jComboBox setModel new DefaultComboBoxModel lt String gt  ls toArray new String 0

User · Answer

I don t like the accepted answer or  fivetwentysix s comment regarding how to solve this  It gets at one method for doing this  but doesn t give the full solution to using toArray  You need to use toArray and give it an argument that s an array of the correct type and size so that you don t end up with an Object array  While an object array will work  I don t think it s best practice in a strongly typed language   String   array   arrayList toArray new String arrayList size      JComboBox comboBox   new JComboBox array     Alternatively  you can also maintain strong typing by just using a for loop   String   array   new String arrayList size     for int i   0  i  lt  array length  i          array i    arrayList get i     JComboBox comboBox   new JComboBox array

User · Answer

Check this simple code  import java util ArrayList  import javax swing JComboBox  import javax swing JFrame    public class FirstFrame extends JFrame       static JComboBox lt ArrayList gt  mycombo       FirstFrame                 this setSize 600 500           this setTitle  My combo            this setLayout null            ArrayList lt String gt  names new ArrayList lt String gt                names add  jessy            names add  albert            names add  grace            mycombo new JComboBox names toArray             mycombo setBounds 60 32 200 50           this add mycombo           this setVisible true      window visible               public static void main String   args             FirstFrame frame new FirstFrame

User · Answer

Use the toArray   method of the ArrayList class and pass it into the constructor of the JComboBox  See the JavaDoc and tutorial for more info

User · Answer

I believe you can create a new Vector using your ArrayList and pass that to the JCombobox Constructor   JComboBox lt String gt  combobox   new JComboBox lt String gt  new Vector lt String gt  myArrayList      my example is only strings though

User · Answer

By combining existing answers  this one and this one  the proper type safe way to add an ArrayList to a JComboBox is the following   private DefaultComboBoxModel lt YourClass gt  getComboBoxModel List lt YourClass gt  yourClassList        YourClass   comboBoxModel   yourClassList toArray new YourClass 0        return new DefaultComboBoxModel lt  gt  comboBoxModel       In your GUI code you set the entire list into your JComboBox as follows   DefaultComboBoxModel lt YourClass gt  comboBoxModel   getComboBoxModel yourClassList   comboBox setModel comboBoxModel

User · Answer

i think that is the solution  ArrayList lt table gt  libel   new ArrayList lt table gt     try   SessionFactory sf   new Configuration   configure   buildSessionFactory    Session s   sf openSession    s beginTransaction     String hql    FROM table     org hibernate Query query   s createQuery hql   libel   ArrayList lt table gt   query list    Iterator it   libel iterator    while it hasNext      table cat    table  it next     cat getLibCat     table colonm getter   combobox addItem cat getLibCat       s getTransaction   commit    s close    sf close      catch  Exception e    System out println  Exception in getSelectedData    e getMessage

User · Answer

DefaultComboBoxModel dml  new DefaultComboBoxModel    for  int i   0  i  lt   lt ArrayList gt  size    i        dml addElement  lt ArrayList gt  get i  getField         lt ComboBoxName gt  setModel dml     Understandable code Edit lt  gt  with type as required

[java] How do I populate a JComboBox with an ArrayList?

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