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They chose the fat delimiters """, with the opening delimiter followed by a line terminators, as shown in the below example. Opening and Closing Delimitersīecause text blocks exist in addition to string literals, the development team needed a way to visually separate text blocks and string literals. Because of that, text blocks eliminate the need to concatenate multiple strings together, escape nested quotation marks, or include newline markers. Another important consideration in JEP 355 is the effort to make inline multi-line Strings more readable.

This is a feature that is currently available with most programming languages and that Java has caught up with this release. New Features in JDK 13 Text BlocksĪs mentioned above, the biggest feature of JEP 355: Text Blocks is the ability to use multi-line string literals in Java. JEP 378: Text Blocks (Standard)Īfter a successful second preview period, JEP 378: Text blocks have now been targeted as a standard feature for Java 15. The main updates in JEP 368: Text Blocks (Second Preview) are adding two new escape sequences - \s and \ which add a necessary level of simplicity for text blocks. In 2019, JEP 355 added a more concrete vision for how Raw String Literals will work in Java, including considerations for formatting, readability, and decreasing the frequency and necessity of escape sequences. They pointed to issues with the backslash being too lightweight typographically, and the “any number of quotes” rule being counter to a tool-friendly philosophy – among other feedback. In December of 2018, the proposal was withdrawn due to feedback from the community. It added raw string literals to Java to help developers avoid escapes – a common issue when writing strings. Raw string literals were to be introduced in JDK 12 as exploratory preview feature under JEP 326. The text blocks preview feature began as work on the (now deprecated) JDK Enhancement Proposal 326: raw string literals, and has culminated in a target standard feature release with JEP 378 targeted for Java 15. From Raw String Literals to Text Blocks (Standard) But first, how did we get here? What Are Text Blocks?įirst introduced in JDK 13, the text blocks Java language feature introduces a way for developers to predictably format multi-line string literals while avoiding most escape sequences. You can also control how the values are formatted.In this article, we look at the origins of text blocks, changes through JEP 355 and JEP 368, and how developers can start planning for text blocks with their introduction to the language starting in Java 15. You can use text blocks to define multiline String literals with ease.

Let’s see how text blocks, a new preview feature in Java 13, can help. But this flexibility results in making some string values difficult to read or modify for example, those with embedded quotation marks, escape characters, or strings that span more than one line. It can store anything from a few characters to multiple lines in any language. The String data type is perhaps one of the most used types by Java developers. With text blocks, introduced in Oracle Java 13, it became easier for you to work with multiline string literals, without the need to escape the special characters in string literals or use concatenation operators for values that span multiple lines. Text Blocks are available in multiple distributions of Java (Oracle, OpenJDK, etc) but we will cover mostly the one present in Oracle JDK. In this article, we will discuss the Java Text Blocks.