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removing jRadioButton automatically in java
// bg: buttonGroup

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
    int count = -1;
    for (Enumeration e=bg.getElements(); e.hasMoreElements(); ) {
        JRadioButton b = (JRadioButton)e.nextElement();count++;
        if (b.getModel() == bg.getSelection()) {
            bg.remove(b);
            jPanel1.remove(jPanel1.getComponent(count));
        }
    }
}

jPanel1.revalidate();
jPanel1.repaint();