12/11/2022 0 Comments Java 13 text blocksMore generally, the need to denote short, medium, and long blocks of text in a Java program is near universal, whether the text is code from other programming languages, structured text representing golden files, or messages in natural languages. The snippet is often difficult to read and arduous to maintain. In Java, embedding a snippet of HTML, XML, SQL, or JSON in a string literal "." usually requires significant editing with escapes and concatenation before the code containing the snippet will compile. Text blocks do not support raw strings, that is, strings whose characters are not processed in any way. In the meantime, the new instance method String::formatted aids in situations where interpolation might be desired. Interpolation may be considered in a future JEP. Text blocks do not directly support string interpolation. It is not a goal to define new operators, distinct from +, that take String operands. It is not a goal to define a new reference type, distinct from , for the strings expressed by any new construct. Support migration from string literals by stipulating that any new construct can express the same set of strings as a string literal, interpret the same escape sequences, and be manipulated in the same ways as a string literal.Īdd escape sequences for managing explicit white space and newline control. Simplify the task of writing Java programs by making it easy to express strings that span several lines of source code, while avoiding escape sequences in common cases.Įnhance the readability of strings in Java programs that denote code written in non-Java languages. Feedback on JDK 14 suggested that text blocks were ready to become final and permanent in JDK 15 with no further changes. Consequently, JEP 368 was targeted to JDK 14 in November 2019 as a preview feature. Feedback on JDK 13 suggested that text blocks should be previewed again in JDK 14, with the addition of two new escape sequences. JEP 355 was targeted to JDK 13 in June 2019 as a preview feature. Text blocks were proposed by JEP 355 in early 2019 as a follow-on to explorations begun in JEP 326 (Raw String Literals), which was initially targeted to JDK 12 but eventually withdrawn and did not appear in that release. A text block is a multi-line string literal that avoids the need for most escape sequences, automatically formats the string in a predictable way, and gives the developer control over the format when desired. Featuresģ39: Edwards-Curve Digital Signature Algorithm (EdDSA)ģ72: Remove the Nashorn JavaScript Engineģ73: Reimplement the Legacy DatagramSocket APIģ74: Disable and Deprecate Biased Lockingģ75: Pattern Matching for instanceof (Second Preview)ģ77: ZGC: A Scalable Low-Latency Garbage Collectorģ79: Shenandoah: A Low-Pause-Time Garbage Collectorģ83: Foreign-Memory Access API (Second Incubator)ģ85: Deprecate RMI Activation for Removal Scheduleġ Rampdown Phase One (fork from main line)Īdd text blocks to the Java language. The release was produced using the JDK Release Process (JEP 3). The features and schedule of this release were proposed and tracked via the JEP Process, as amended by the JEP 2.0 proposal. Production-ready binaries under the GPL are available from Oracle binaries from other vendors will follow shortly. JDK 15 reached General Availability on 15 September 2020. JDK 15 is the open-source reference implementation of version 15 of the Java SE Platform, as specified by by JSR 390 in the Java Community Process.
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