I have 2 classes, one to make a frame and the other to handle and implement the interface TableModel. When editing cells inline and updating the values in the class that implements TableModel I then need to refresh the table to show the updated data (as the table needs to auto sort thus when I inline edit a cell the rows may need to be re-ordered). The problem I'm having is after updating the data I can't figure out how to refresh the table, I've tried a hacky way of refreshing it when you click off the cell or press enter but I feel there could be a more elegant solution, any ideas?
The TableModel is responsible for invoking the fireTableCellChanged(...) method when data is changed in the model. Sorting will then happen automatically.
Read the JTable API and follow the link to the Swing tutorial on How to Use Tables for more information about TableModels and sorting.
I suggest you just use the DefaultTableModel so you don't have to worry about this since it implements all the TableModel methods.
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I'm trying to do an MVC app with java, and i want to have a window with a JTable in it.
Apparently that's the component that can display a listbox with multicolumns, and i want to fill it with instances of different classes that implements the same interface.
The only thing i was able to do for now is to initialize my JTable with a Object[][] and an array of string for the columns name.
But this doesn't feel right. Everytime something changes in my model which contains the original list of objects, i would have to reload everything in my JTable...
Is there a way to simply bind a Vector into a JTable so that it automatically update when the Vector is modified ?
Thanks in advance for your answer.
Everytime something changes in my model
You should have a separate model. You should be changing the TableModel
Is there a way to simply bind a Vector into a JTable so that it automatically update when the Vector is modified ?
You should NOT be updating the Vector.
Instead you should be updating the TableModel. Then the TableModel will notify the JTable of the changes so the table can be repainted.
This is the way Model-View-Controller (MVC) works for all Swing components.
I'm currently using a JFrame to hold a JTabbedPane that contains multiple tables. In my class that extends JFrame and implements TableModelListener, I have an onChanged() method that takes a TableModelEvent as an argument. I can successfully obtain data from the event on the table that the event was fired from, but I can't determine which table it was.
From what I understand, this is not the way to do what I intend to do. I believe that I may need to write a custom TableModelListener or JTable and implement the onChanged() method there.
What do I need to do to determine which JTable was changed in the JTabbedPane? I'll need to find the table and the row that was modified.
TableModelListener and TableModelEvent won't provide information about the JTable that the model is associated with, as the model may be shared by multiple tables, in theory.
Getting the row is matter of getting the row from the event, which comes from the firstRow and lastRow properties. Once you can establish which table the model belongs to you, you can determine the view row by using JTable#convertRowIndexToView
To find the JTable you have, at least, two basic solutions
You Could...
Ask each table, stored in each JTabbedPane for their model and compare it with the model that generated the table model event
You Could...
Maintain some kind of look up between the TableModel and the JTable or JTabbedPane, depending on what it's you are ultimately after
This could be achieved by using Map of some kind, keyed to the TableModel
I believe that I may need to write a custom TableModelListener...
Check out the Table Cell Listener.
It is very similar to a TableModelListener, but you do need to specify the JTable when creating the TableCellListener, so you do have access to the table when a value is changed.
There are many rows on above showing jtable. I want to filter record by short code. If I type short code like 1234 it should be display only short code 1234 associated row on jtable.
Thanks
You're going to have write the code...Start by checking out how to use tables, in particular sorting and filtering
The basic requirement would be to attach an ActionListener to both the field and button (you can do this from the form editor if you wish).
Within the actionPerformed event handler method, you need to create a RowFilter and apply it to the tables RowSorter.
A table can be configured to automatically create a row sorter by setting the autoCreateRowSorter property to true.
It's all explained nicely in the linked tutorials...
And another example
Is there any way to detect a cell selection change in a JTable? I've found documentation for detecting a row change using ListSelectionListener but it doesn't seam to work when changing selection on the same row. I'm using JTable to render a simple schedule.
Maybe I should use a different component?
No, the right component for showing tabular data is JTable.
You want to add a listener to the TableModel that's underneath the table. That will fire off events whenever data changes. You get it out of JTable, unsurprisingly enough, by calling getTableModel().
Update
Oh wait, I think I misunderstood you. You're not interested in data changes but column selection changes.
JTable has a method called columnSelectionChanged; its documentation says it's called by TableColumnModelListener, which leads me to believe that what you want to do is getColumnModel() and use the addColumnModelListener() method of that to listen for column selection changes.
I can set data in JTable constructor, and then user can change this data when program is running manually(typing from keyboard).
But what method should I use in case I want to change data in some column? To change column header I use TableColumn method setHeaderValue. What should I use to set value in JTable cell?
If you want to allow users to edit the data, then you need to set a TableCellEditor on the cells that you want people to edit. You probably also want to start using a TableModel instead of hard coding the data in the JTable itself.
See http://java.sun.com/docs/books/tutorial/uiswing/components/table.html
While creating the JTable you first need to specify that the values of particular column are editable. You can obviously also provide the row basis edit functionality. but all these things you should define while ccreating the table itself. Please reply if you need any help on this.