Find Component by name

[amjad905]

Hi,
I have created dynamic components and added it to a jpanel and then the jpanel to the jform...
Each component has a name as I set lbl.setname("") etc..
each component has a mouselistener
However, Now I need to find components by name and change the text inside them...
However, I can chnage the text of the selected component but how
do i find a component with another name and change the text of that label with mouselistener...

[Fubarable]

You could iterate through all the components on a form, and if nested, use recursion. Simpler would be to place the important components into a HashMap<String, JComponent>.

I have a sneaking suspicion that there may be an even better solution available, but you'd have to describe your problem in quite a bit greater detail and probably post some code to see if this is so. Best of luck.

[amjad905]

Hi,
How do I iterate through all the components on a form??
Can't I do this?
For (int i=0;i<frame.getComponentCount;i++)
{
if (frame.getComponent().getName().equals("A2"))
{
System.out.println("found element");
}
}

[Fubarable]

You would probably have to use recursion. A JFrame's components are first of all in its contentPane, so that's where I'd start. In your recursion search method, if the found component is a container, then see if it holds any components and search those as well.

But to tell the truth, this whole find by name smells a bit funny to me. That's why I'd recommend you tell us your whole problem and post code so we can find a better solution that may have nothing to do with names.

[amjad905]

Basically, I need to find a component with a name and then change the background color of that component...

hmm... how do I search for the components in the JFrame can u provide a code for it??
frame.getContentPanel().wht???

I will try to paste the code by breakin it up as it is alot messy and will very hard to understand

[Fubarable]

Again, more detail is important: How do you get the components name in the first place? In other words, how do you decide which component (regardless of the name) needs to have its color changed? Is it the one clicked? Random? By some other method?

[amjad905]

Hi,
Ok There is a header whose name is set as A, B, C etc
then there is a labels whose name is A1, A2, B1, B2 etc
Just like Excel....

A1, A2 etc has a mouselistener implemented...
SO If I click on A1 I get the Alphabet and leave the number...
In this case , It becomes A...
So I want to change the label background color whose name is A

[amjad905]

Can you please tell me how to iterate through a JForm or a JPanel...
The name of the component I get through the MouseListener
public void mouseClicked(MouseEvent e) {
comp = (JComponent) e.getSource();
comp.setBackground(Color.RED);
}

but how do I search for a label with a specific name as the
comp = (JComponent) e.getSource();
comp.getName() gives A1 but I want to find another JLabel with A as I remove the 1 from the getname and try to find the JLabel with A

[Fubarable]

are all the A1, A2, ... Ax labels on one row? Likewise for the Bx, Cx, etc labels? Could you place the A labels into an ArrayList<JLabel> aLabel collection, and same for the other labels? Then just iterate through the selected collection and change the background color of the entire row (I'm guessing that that is what you want to do).

[amjad905]

Hi,
Thanks for your help... I managed to iterate through the JPanel and solved my problem... Thanks for helping...