JavaFAQ Home » Swing, AWT
Labels display fixed text or images on a GUI as information to the user,
for example, as a label in front of a a JTextField, etc. You can have text
(including HTML), an image, or both on a JLabel. A JLabel has a transparent
background, so it will always match the container it is in.
Assume the following declarations.
int alignment; //
JLabel yourLabel = new JLabel(text);
JLabel yourLabel = new JLabel(text, alignment);
JLabel yourLabel = new JLabel(image);
JLabel yourLabel = new JLabel(image, alignment);
JLabel yourLabel = new JLabel(text, image, alignment);
Because there is usually no need to refer to a JLabel after it has been added to
a container, it is common to combine creation and adding the JLabel in one
statement. For example.
p.add(new JLabel("Enter your ID:", JLabel.RIGHT));
is the same as
JLabel idLabel = new JLabel("Enter your ID:", JLabel.RIGHT);
. . .
HTML in JLabels
You may put HTML text in a JLabel. In this case the text should begin with
and end with
The most user-friendly interfaces are usually obtained by using the default
appearance. Altho the default is the most common, you might want to change the
font size in some situations. Look at
JLabel font and color if you really must make changes. A more common way to
control the appearance of a JLabel is using HTML (see above).
It's also possible to dynamically change the text of a JLabel, ie, use it for
output. This is not generally a good idea because it may change the size of the
JLabel and therefore require a change in the layout of components. Using a
JTextField is much better.
JLabel setting text has information for how to do it tho.
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