I've read that multiline string literals were proposed to be added in Java 7.
Although I can't find any documentation saying definitely that they have been. I'd like to know if they are, because this is something I'd consider switching versions for.
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So @Mike, what's the question again?mauris– mauris2011-01-03 00:42:09 +00:00Commented Jan 3, 2011 at 0:42
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1There's a proposal from 2008, but nothing in the feature list. There's a library implementation.moinudin– moinudin2011-01-03 00:43:21 +00:00Commented Jan 3, 2011 at 0:43
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Why do you need multi line strings, if you really need them load text files etc.mP.– mP.2011-01-03 00:43:33 +00:00Commented Jan 3, 2011 at 0:43
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5@mp I'm hoping to avoid discussing why. let's just assume I have a good reason for it.Mike– Mike2011-01-03 00:44:44 +00:00Commented Jan 3, 2011 at 0:44
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1possible duplicate of Java multiline stringJason C– Jason C2014-03-28 20:23:12 +00:00Commented Mar 28, 2014 at 20:23
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4 Answers
Multiline string literals are not going to be added to JDK 7. You can check Project Coin's homepage for a list of language changes.
However, you can use Scala, which does support multiline string literals using triple quotes:
var s = """Hello
World"""
5 Comments
João Silva
Because it also targets the JVM.
WestCoastProjects
The problem with scala in this context is losing the simplicity of all source and files within one place, which is the win of heredocs.
Jack Holt
This is of course of topic of the original question but I would suggest that Groovy is now the evolution of Java and it supports multiline strings using either three double-quotes or single-quotes.
E. Sundin
Well since we branch out in this question I'd say Kotlin does a good job at this.
Multiline strings were not added into Java (even as of Java 8, the newest current version), and probably will never be added to Java. However, you can add multiple strings together like so:
String greeting = "Hello " +
"world! " +
"This is a multiline string.";
Or, if you want the multiline line breaks to actually start a new line, insert "\n" to the end of each line.
2 Comments
Thomas Jungblut
You do understand that multiline refers to the source code, not the rendered version?
hyperneutrino
@ThomasJungblut Sorry. I must've misunderstood. I will edit my answer.
Multiline strings are supported in Java since JDK 13. They are called text blocks:
String html = """
<html>
<body>
<p>Hello, world</p>
</body>
</html>
""";
Note, this is a preview feature. But I hope it will become a permanent feature in one of the next releases (JDK 14-15).
1 Comment
gavenkoa
It is official with Java 15!
Following Java's coding conventions Strings should be concatenated like:
String str = "Long text line "
+ "more long text.";
Make sure the + operator always begins the next line for readability.
See: Code Conventions for the Java Programming Language: 4. Indentation
