ComboBoX dropdown

[dalu]

Hi,
I have a frame with a combobox. the combox is editable. It should show [Select] in its text field when we open the frame but in the drop down, [Select] should not be shown as a drop down item.

Now I have implemented the combobos as:
combo.addItem("Select");
combo.addItem("A");
combo.addItem("B");
and so on...
But the Select is an item and will be shown in the drop down
Can anyone help me plz....

[camickr]

The Combo Box Prompt might be what you are looking for.

[dalu]

Yes...Its the same thing I wanted..
Now my code part looks like this..

combo.addItem("A");
combo.addItem("B");
combo.setRenderer(new PromptComboBoxRenderer("Select "));

Did I missed something???It doesnt seem to work...

Thnks fr the help...

[camickr]

You didn't miss anything. Only a single line of code is required. It was tested on XP using JDK6.7.

Post your Short, Self Contained, Correct Example that demonstrates the problem.

[dalu]

Hi,
I am involved in a project for creating a library database.
My exact code looks like this:

public combobox()
{
JFrame frame = new JFrame("Library Database");
String Books[] = {"Maths","Physics","Chemistry","Commerce"};
Panel panel = new JPanel();
combo = new JComboBox(Books);
combo.setRenderer(new PromptComboBoxRenderer("[Select] "));
panel.add(combo);
}

and this selelcted item is used for display in a text field. But it doesn't work.

Thanks for ur help once again...

[dlorde]

The combo box selects the first item by default. Once you've set the renderer and the items into the combo box, clear the default selection:

combo.setSelectedIndex(-1);

[dalu]

Thanks a lot....,
It works...