![]() A text block starts with """ followed by optional white space and a line feed. JEP 378, which is included with Java 15, provides text blocks for multiline strings. In JavaScript, the implementor of a flavor provides a function in Scala, a macro. Some languages allow for arbitrary flavors. ![]() Here you see another phenomenon: flavors of string literals, typically indicated by a prefix such as raw. Again in JavaScript: let path = raw`c:\users\nate` Raw string literals turn off escape sequences, so that you can include backslashes without fear. That gets tedious: String path = "c:\\users What if your string has backslashes? Then you need to escape them too. Here each line ends in a carriage return-newline pair. That's nice too, and a number of other programming languages support interpolation.įor characters that you can't or don't want to include literally (non-printable characters, non-ASCII Unicode), you use escapes: String request = "GET / HTTP/1.0\r\nHost: \r\n" In JavaScript, this form of literals is called a template because you can include interpolated expressions: let myTitle = `: $'s Document` For example, in JavaScript, you can use a template literal: let myDoc = ` Other programming languages have string literal types that allow newlines. With the classic Java string literals, that's not a lot of fun: String myDoc = "\n \n My Document\n " Sometimes, you need string literals that contain code in another programming language, such as HTML or SQL code, or perhaps plain text such as a license statement. Their usage is mostly straightforward, but you need to be aware how whitespace and escape sequences are processed. Text blocks, added in their final form to Java 15, are a new form of string literals that is particularly suited for multiline text. evaluating a string literal containing one or more placeholders, yielding a result in which the placeholders are replaced with their corresponding values. Interpolation may be considered in a future JEP. This article, also posted on, dwells (perhaps excessively) on some corner cases to watch out for. From the spec for text blocks: Text blocks do not directly support string interpolation. They work nicely for most common use cases. JDK 15 Standard feature Text blocks provide us a better way to write strings that span several lines of source code. Java 15 will be released really soon now, and after two preview phases, multiline strings (AKA “text blocks”) are now a permanent part of the language. What is Text Blocks feature in Java 15 - YouTube In this video, I will help you understand Text Blocks - the new, standard feature in Java 15 with some code examples (text.
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