I have created a JTable using GUI Builder in NetBeans. It is Currently Having no data. The table is editable, and is Displayed in on a Panel. This Table is called passengerDetailsTable. Now I want users to Write data in its cells and after entering data, when they press submit, data should be extracted from table and available for processing. But I am unable to do it.
I have written sample code to do above:
TableModel tm = passengerDetailsTable.getModel();
Object o = tm.getValueAt(1,1);
System.out.println(o.toString());
This code is triggered when I press submit button.
According to me It should print the value at cell(1,1). But it gives Null pointer exception. Please help me to resolve it.
Now I want users to Write data in its cells and after entering data,
Did the data get saved to the model?
See Table Stop Editing for a way to make sure the data is save when you click a button.
If this doesn't help then post a proper SSCCE that demonstrates the problem because we don't have enough information to keep guessing what you might be doing.
Related
I have created a TableView in scenebuilder and it is populated with data from a table in SQLiteStudio. I have managed to fill all textfields once the user clicks on a row. The code for that is here:
I have created a update button that is setOnAction. I have tried this code below to allow the users new entry in the textfield to overwrite the original but it is not working. Apparently, my sql query is not correct and I should included something in SQLite database. I just don't know how to do this.
Thank you any help given
Your update code sends changes to database only and does not affect TableView. To update TableView you should also set new data to object from TableView like you got old data from it in fill but in the opposite direction.
I'm currently developing a simple application which does crud operations on a few tables.
It looks like this:
I have a problem with the add item form, invoked by pressing the button saying "Nova jedinica mjere". It opens a popup containing an ADF form as follows:
As you can see it does a create insert operation on popup fetch event, creating an empty row. When I fill the form with data, and press OK(the ok button is handled in the bean, doing a commit operation), I get an empty error message as follows:
This only happens if the table is editable(consisting of input text elements). If it is set to click to edit, this problem does not occur. How can I make validation only occur on form fields?
If you need any more info, please let me know because I too am new to adf.
EDIT:
This is the page in question:(posted as a pastebin link to not take up much space).
http://pastebin.com/5TKyPxEs
The form in the popup is a static region from a task flow with a method call and a page:
http://pastebin.com/9h69fRW4
You mean to say that when you enter the value in the form and Click OK, it should be there in the Table,If so, the values are not getting displayed in Table. It means your Iterator is not fetching the values. You have to Refresh your Iterator, VO and Table Compoent through Bean. So that the values in the form once you click OK, it will be there in the Table.
I have been researching this for days and have tried everything I have come across, but to no avail. I have built an item checkout system in JAVA using a Derby Embedded Database and everything that I have wanted it to do works great. The only thing I can't get to work is having my table update or refresh the information displayed after the user (A) Adds a new entry in the system due to a customer checking out an item. (B) A customer returns an item and is checked back into the system. (C) The table data is changed/fixed due to a previous user error. Case in point: The user checks out an item using the check out dialogue box, then clicks the check in dialogue box but the new entry just made, does not appear. Closing out of the program and going back into it then shows the new information.
I have a method called loadTable() that makes the DB connection all the way through building the table how I want and returns the table.
So far I have tried:
- Calling the loadTable() on any event (Button pressed, window closed, etc).
setFireTableDataChanged() method.
table.setModel(), here I tried inserting the loadTable().getModel or using a temp table.
jtable.tableChanged(new TableModelEvent(jtable.getModel())).
SwingUtilities.updateComponentTreeUI(yourJScrollPane); Ultimately it gets added to JSP.
table.UpdateUI();.
((DefaultTableModel)table.getModel()).fireTableDataChanged();.
repaint().
revalidate().
So far everything I have tried, does not produce the desired results.
I know you all will want to see code, there's a lot so I don't know what I should start with. This is my first time posting so, have mercy on me if i'm going about this the wrong way. Many thanks in advance!
Creating front-end (Java) user interactive table using MySQL as back-end
Now im trying to create user interactive form.
Untill now, I have created a form view, using swing components, JLable, JTextfield where user enters data. JButtons, 'new' 'save' 'delete' 'edit', which listens user action through ActionListner.
A table that 'extends' AbstractTableModel. Table values are the ResultSet values. i have used MySQL connectivity.
Table is displayed. User can now add new row to it, using 'New' and 'Save' button.
My problem is, i need the corresponding TextFields to display the corresponding row user selects in the displayed table, so that 'edit' and 'delete' would be user interactive. users are allowed to select table's row. Need Help.
Im sorry if any mistake in my question format and language. Thank you!
i need code for creating table ...
ple help me on tis....
i need code for creating table
How much will you pay? :)
..i need the corresponding TextFields to display the corresponding row user selects in the displayed table..
For that you can use,
Give a button, like EDIT and in the event handler for EDIT use something like,
jTextField.setText( jTable.getValueAt(
jTable.getSelectedRow(),
jTable.getSelectedColumn())
.toString()
);
2.As an alternative you can also utilize the event in jtable like mouseClicked with the above code
Now regarding the edit and delete , you may utilize the focusLost event of the textfield or use a EDIT or DELETE button, and carryout the updation, which will be much reasonable option.
Additionaly have a look at this : Using JDBC with GUI API
I am having a problem on my viewing function in my desktop application.
The program lets the user view the names and corresponding details by clicking the "view all" button.
The problem is if the user clicks the "View all" button again it will add another set of the list stored in the database.
This is what happened after the second click
Can you help me stop this problem?
Clear the JTextArea in the View All button's actionhandler. Use the setText(String s) method to achieve that.
Your data is not formatted in a legible manner. It would probably be better to use a JTable to display the data. Read the section from the Swing tutorial on How to Use Tables for more information and working examples.
When you are ready to refresh the data you create a new TableModel with the updated data. Then you update the table with the new data by using:
table.setModel( yourNewModel );