java - get text from dynamically added jPanel

Question

I am adding dynamically subPanel to jPanel1 (with jTextField and jButton). Some of part code was borrowed from there.

I am trying to get text from components of jPanel1, but cannot succeed.

EDITED: This is a subPanel that contains jTextField, +Button and -Button.

private class subPanel extends javax.swing.JPanel {         
        subPanel me;
        public subPanel() {
            super();
            me = this;
            JTextField myLabel = new JTextField(15);
            add(myLabel);
            JButton myButtonRemove = new JButton("-");
            JButton myButtonAdd = new JButton("+");
            add(myButtonRemove);
            add(myButtonAdd);

Here is code of AddButton:

    jPanel1.add(new subPanel());
    pack();

The code that I am trying to get text from jTextField doesn't work:

     Component[] children = jPanel1.getComponents();
     for (int i=0;i<children.length;i++){
     if (children[i] instanceof JTextField){
     String text = ((JTextField)children[i]).getText();
     System.out.println(text);

}

Your response will be greatly appreciated.

Answer 1

Problem is: You are iterating over the children of jPanel1:

jPanel1.getComponents();

And expect there to be a JTextField:

if (children[i] instanceof JTextField){
     String text = ((JTextField)children[i]).getText();
     System.out.println(text);
}

But since you have added subPanels to jPanel1, the children of jPanel1 are subPanels, not JTextFields!

So, in order to access the JTextFields, you'll have to iterate over the children of the subPanels in a second for-loop!

Example:

Component[] children = jPanel1.getComponents();
// iterate over all subPanels...
for (Component sp : children) {
    if (sp instanceof subPanel) {
        Component[] spChildren = ((subPanel)sp).getComponents();
        // now iterate over all JTextFields...
        for (Component spChild : spChildren) {
            if (spChild instanceof JTextField) {
                String text = ((JTextField)spChild).getText();
                System.out.println(text);
            }
        }
    }
}