jlist

I have a JList that is located in a JScrollPane. The application has a button for users to browse fileSystem and select a category to show its files and folders. First time user clicks on the button JList shows the list and enables user to select from the list but if user clicks on the browse button for the second time new items will be shown but he wont be able to select any item from the list anymore. public class Main { private JFrame frame; final JFileChooser fc = new JFileChooser(); private JScrollPane scrollPane; File directory; JList<File> list; private final Action action_1 = new

i am trying to add ArrayList to Jlist, but the only way that I given to understand is that to write the code like this : ArrayList<String> labels = new ArrayList<String>(); JList jlist = new JList(labels.toArray()); Whats confusing me is that, why i cannot just add ArrayList to Jlist directly like this : ArrayList<String> labels = new ArrayList<String>(); JList jlist = new JList(labels); thanks in advance. The inclusion of "helper" constructors was meant to make it easier to use the JList with simple data structures. The JList (and many Swing components) are actually meant to be used with

I'd like to know if there is any way that I can update a Jlist after the user adds or removes an item to it and after a user sorts it. Is there any way that I can write a standardized method to update the display based on the order of items in an array or vector, and when the user remove or adds an object from the array that the JList is based on? Thank you. Updates should be made to the ListModel, not the Array that was used to create the model. However, if you want to refresh the list with completely new items or change the order of the items then you create a new DefaultListModel and use

I'm trying to create a simple program to manage Employees. When trying to add a new employee I can't seem to get the employee to be displayed on the Jlist. The main frame... public class EmployeeFrame extends JFrame implements ActionListener { // The buttons to display private JButton addButton; private JButton editButton; private JButton deleteButton; private JButton saveButton; // The underlying list of employees, and the GUI object to display them private DefaultListModel<Employee> listModel; private JList<Employee> employeeList; public static final String SAVE_FILE = "employees.txt"; /** *

The use case in my UI is to populate two JTextField components based on double clicking items in a JList . The easy was is to use a JCheckBox populate jTextField1 if the checkbox is selected, and populate the other if it is not selected or vice versa which is working perfectly. But I would like to explore if this can be done without the checkbox. As in, if I type something in jtextfield1 and double click the item in list to complete the text, the item clicked should be appended to jtextfield1 based on fetching the latest KeyStroke I used. Is there are any way to do this? The use case in my UI

I have a java applet in which I have to display a large amount of items (dictionary entries). The user needs to be able to select individual items in the list, hence it is implemented as a JList. Generating the list was very quick until I decided to make the display more asthetically pleasing by formatting the individual items using HTML. Now the list looks pretty but it takes between 10 and 15 seconds to generate it each time the user accesses the dictionary (without formatting it occurs almost instantly). I suppose I could take the performance hit up front by generating the list when the

I have a JList, wich must display more than 3000 items. I wish to have "visible" around 100 items in the list, and when you scroll and getting close to the end (or begining) of the "visible" items the next portion (around 50) must be loaded in the list. Is there any simple way of doing this? mKorbel no there are no simple way for that, you have to implements Pagination(s) easiest job when is managed by Databases engine, most of then support paginations directly in the Model, but I never seen workaround for XxxListModel, use JTable with one Colum instead, there are some good workaround for

Could anyone suggest me how to store .TIF formatted image to ImageIcon and add this image to list model? I tried this but gives me java.lang.NullPointerException . public static void main(String[] args) throws Exception { String path = "C:\\project\\aimages"; JFrame frame = new JFrame(); frame.setSize(500, 500); frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); File folder = new File(path); File[] listOfFiles = folder.listFiles(); DefaultListModel listModel = new DefaultListModel(); System.out.println("listOfFiles.length="+listOfFiles.length); int count = 0; for (int i = 0; i <