I am writing a program that contains a JButton. Every time the button is clicked, a new JTextField is added to a JPanel.
My problem is that, after the user has created all the JTextFields and filled them with information, I need to get the text of each field. How can I get access to the JTextFields when they are dynamically generated, as they don't have instance names? Is there a better way to get the text of each one, without knowing their instance name.
Here is the code of the actionPerformed event of the JButton...
private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {
JTextField x = new JTextField();
x.setColumns(12);
p.add(x);
validate();
}
You say you want to get the text from each field. So, when you create the new instances x, why don't you keep a collection of them, such as adding the JTextFields to an ArrayList?
Alternatively, assuming that p is a JPanel, you should be able to get all the children, which would be the JTextFields that you're adding. Try using getComponents() like so...
Component[] children = p.getComponents();
for (int i=0;i<children.length;i++){
if (children[i] instanceof JTextField){
String text = ((JTextField)children[i]).getText():
}
}
You can find them all by looping through the components of the panel (or whatever "p" is). If necessary, check if each is a text box. That is, do p.getComponents and then loop through the returned array. Like:
Component[] components=p.getComponents();
for (Component c : components)
{
if (c instanceof JTextField)
{
String value=((JTextField)c).getText();
... do whatever ...
}
}
If they are interchangeable, that should be all you need. If you need to distinguish them, I think the cleanest thing to do would be to create your own class that extends JTextField and that has a field for a name or sequence number or whatever you need.
