Text block handles the incidental white spaces. In formatting the content, we may give leading and trailing incidental spaces to the content. But normalization of line terminators solves this problem. At run time, a text block is a reference to an instance of class String that denotes the string represented by the text block. Line terminator on Unix platform is LF and line terminator on Windows platform is CRLF and hence without normalization the content could become one character longer for each line and any test with String::equals would fail. Suppose a Java source code was created on Unix platform and edited on a Windows platform. Let us understand the advantage of this process. Java 13 has delivered the long-awaited multiline strings or Text Blocks.You no longer need to concatenate strings that span multiple lines or escape special characters, which really improves the readability of your code. The escape sequences \n (LF), \f (FF), and \r (CR) are not interpreted during normalization and escape processing happens later. This process ensures that string derived from the text block content is equivalent across platforms. In the text block compilation, line terminators in the content are normalized from CR (\u000D) and CRLF (\u000D\u000A) to LF (\u000A). I’m only going to cover how Text Blocks have changed in Java 14 in this blog. It introduces two new escape sequences, and s, to exercise finer control of how new-line characters and end-of-line spaces are handled in text blocks (multiline strings). Escape sequences Escape sequences in the content are interpreted. The Text Blocks feature is in its second preview in Java 14. Incidental white space Incidental white spaces surrounding the content that are introduced to match the indentation of Java source code are removed.ģ. Line terminators Line terminators in the content are translated to LF (\u000A).Ģ. Text blocksJava’s term for multiline stringsimmensely improve the readability of your code. ![]() ![]() The content of text block is processed by Java compiler in three distinct steps.ġ. ![]() It allows to define multi-lined string literals without breaking code indentation, by stripping the common white space prefix from the lines. Text block is a constant expression of type String, same as string literal. Java 15 introduced (non-preview) text blocks feature.
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