Newline in JLabel | 易学教程

问题

How can I display a newline in JLabel?

For example, if I wanted:

Hello World!
blahblahblah

This is what I have right now:

JLabel l = new JLabel(\"Hello World!\\nblahblahblah\", SwingConstants.CENTER);

This is what is displayed:

Hello World!blahblahblah

Forgive me if this is a dumb question, I\'m just learning some Swing basics...

回答1:

Surround the string with <html></html> and break the lines with <br/>.

JLabel l = new JLabel("<html>Hello World!<br/>blahblahblah</html>", SwingConstants.CENTER);

回答2:

You can try and do this:

myLabel.setText("<html>" + myString.replaceAll("<","&lt;").replaceAll(">", "&gt;").replaceAll("\n", "<br/>") + "</html>")

The advantages of doing this are:

It replaces all newlines with <br/>, without fail.
It automatically replaces eventual < and > with < and > respectively, preventing some render havoc.

What it does is:

"<html>" + adds an opening html tag at the beginning
.replaceAll("<", "<").replaceAll(">", ">") escapes < and > for convenience
.replaceAll("\n", "<br/>") replaces all newlines by br (HTML line break) tags for what you wanted
... and + "</html>" closes our html tag at the end.

P.S.: I'm very sorry to wake up such an old post, but whatever, you have a reliable snippet for your Java!

回答3:

You can use the MultilineLabel component in the Jide Open Source Components.

http://www.jidesoft.com/products/oss.htm

回答4:

You can do

JLabel l = new JLabel("<html><p>Hello World! blah blah blah</p></html>", SwingConstants.CENTER);

and it will automatically wrap it where appropriate.

回答5:

Thanks Aakash for recommending JIDE MultilineLabel. JIDE's StyledLabel is also enhanced recently to support multiple line. I would recommend it over the MultilineLabel as it has many other great features. You can check out an article on StyledLabel below. It is still free and open source.

http://www.jidesoft.com/articles/StyledLabel.pdf

回答6:

JLabel is actually capable of displaying some rudimentary HTML, which is why it is not responding to your use of the newline character (unlike, say, System.out).

If you put in the corresponding HTML and used <BR>, you would get your newlines.

来源：https://stackoverflow.com/questions/1090098/newline-in-jlabel

标签

java

user-interface

swing

formatting

jlabel