tablemodel

Scenario: you are using a JTable with a custom TableModel to view the contents of some collection located in a database or on the network or whatever. The brute force way to make this work is to load the whole collection at once. Let's say that isn't practical because of the resources needed. The simple way around that problem is to fetch rows on demand, one row at a time, as the JTable renders each row, and calls TableModel.getValueAt(); cache as necessary. This causes a lot of hits to the database, though. Is there a way to listen to scroll/viewport events for a JTable, to figure out what

We're seeing JTable selection get cleared when we do a fireTableDataChanged() or fireTableRowsUpdated() from the TableModel . Is this expected, or are we doing something wrong? I didn't see any property on the JTable (or other related classes) about clearing/preserving selection on model updates. If this is default behavior, is there a good way to prevent this? Maybe some way to "lock" the selection before the update and unlock after? The developer has been experimenting with saving the selection before the update and re-applying it. It's a little slow. This is Java 1.4.2 on Windows XP, if

I have some problems with the manage of two JTable, and relative data. I had make this GUI: I explain the use: In the first jTable I have a list of vehicles (trucks, cars...) and relative info. In the second jTable I have a list of vehicles that I want make "available" (i.e. a sw agent starts), with the press of the green arrow. So, is a sublist of the first list: the row selected in the first table are copied in the second. First problem: In the first column I have a explicative image of the kind of vehicle (you can see a truck in the example). In the third and fifth column I have different

I want to store the results of reading lucene index into jTable, so that I can make it sortable by different columns. From index I am reading terms with different measures of their frequencies. Table columns are these : [string term][int absFrequency][int docFrequency][double invFrequency] So i in AbstractTableModel I can define column names, but i dont know how to get the Object[][]data with results from the following method: public static void FrequencyMap(Directory indexDir) throws Exception { List<ArrayList>redoviLista = new ArrayList<ArrayList>(); //final Map<String,TermRow> map = new

I'm working on JTable that reads text from a .txt file. the txt file gets updated dynamically after 3 sec. Now when I run the application, everything is good except that the output of .txt files comes in JTable from the second line. The first line of txt file doesn't appear on my JTable. Can anyone help? Here's the code: public class InterfaceFrame extends JFrame implements ActionListener{ public static void main(String[] args) throws URISyntaxException, IOException, InterruptedException { panel.setSize(100,100); panel.add(table); model.fireTableStructureChanged(); table.setModel(model);

I created an initial JFrame that contains a table with three columns, as shown below: This JFrame was created in design mode, and so now in the panel's constructor, I want to load some data so when the user selects to open this JFrame, the data is loaded. My column data types are Object (generally 'Status' is for an image representing the status of the share - active or inactive), String for the share's name and integer for the number of active clients connected to that share. My question is, how to I add rows to a JTable via code? In a simplified way (can be improved): class MyModel extends