[hardwired]

The Clipboard is used for data transfer; mostly cut, copy and paste operations. There's no need to use it for what you are describing.

Code:

JTextArea textArea;

// ActionListener for your JButton
public void actionPerformed(ActionEvent e) {
    // get the selection state of all of your checkBoxes and comboBoxes
    // make up a string with the desired info
    textArea.setText(yourString);
    // or if you want to preserve previous entries
    textArea.append(yourString);
}