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Java: JLabel for output
JavaFAQ Home » Swing, AWT
JLabel for output is usually bad
It's possible to change the text of a JLabel, although this is not generally
a good idea after the user interface is already displayed. For output
JTextField is often a better choice. The use of
output is mentioned because some textbooks display output this way. Here are
some reasons not to use it.
- Can't copy to clipboard. The user can not copy text from a
JLabel, but can from a
- Can't set background. Changing the background of individual
components probably isn't a good idea, so this restriction on
is not serious. You can change the background of a
for better or worse.
- Text length. This is where there are some serious issues. You can
always see the entire text in a
JTextField, altho you might
have to scroll it it's long. There are several possibilities with a
JLabel. You may either not see all of the long text in a
or putting long text into a
JLabel may cause the layout to be
recomputed, resulting in a truly weird user experience.
Changing the text of a JLabel
Most JLabels are never changed, except for internationalization, and that is
done before the user interface is shown. To change the text, use
yourLabel.setText(String newText); //
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