Newline in JLabel

java user-interface swing formatting jlabel

174,662

Solution 1

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

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

Solution 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  , 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", " ") 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!

Solution 3

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

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

Solution 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.

Solution 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

View more solutions

174,662

mportiz08

Updated on July 08, 2022

Comments

mportiz08 almost 2 years
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...
- Simon Baars about 7 years
  
  Definitely not a dumb question. Took me a while to figure out html was possible in swing too.
AnnanFay about 13 years

sigh I tried to add backticks to escape your html, however it says I can't edit unless I'm adding at least 6 characters.
Nitin Bansal about 12 years

just a little correction: use instead of just ... this is recommended way of doing it (to not miss any closing tags)...happy coding...
gsgx about 12 years

@NitinBansal Actually it's recommended in the new version of HTML to leave it as . It's called a void tag. still works for backwards compatibility.
Nitin Bansal about 12 years

@gsingh2011 : ok...thats better :-)
arkon almost 11 years

@Annan That isn't necessary in HTML. What you're talking about is for supporting XHTML. stackoverflow.com/questions/1946426/html-5-is-it-br-br-or-br
AnnanFay almost 11 years

@b1naryatr0phy na, the problem was fixed :) The original post had a literal   tag which was formatted by stack-overflow as a literal line break in the post.
ApproachingDarknessFish almost 11 years

Any idea WHY JLabel's don't support newlines by default?
Roberto over 8 years

You actually don't even have to close the html tag. If you need to append text on runtime, this simplifies it a lot!