July 7, 2025 - Java provides some out-of-the-box template processors. The STR Template Processor performs string interpolation by iteratively replacing each embedded expression of the provided template with the stringified value of that expression.

January 20, 2026 - The interpolate() method provides a direct way to perform string interpolation of a StringTemplatePREVIEW.

June 20, 2023 - Whenever we have a String-based template that requires transformation, validation, or sanitizing, Java’s String templates will give us a built-in simplistic template engine without requiring a third-party dependency. To not start from zero, the Java platform provides two additional template processors besides STR. Be aware that the additional template processors seem to be missing-in-action in Java 21.ea.27. At least I didn’t get it to work in my test setup. The processor FMT combines the interpolation power of STR with the format specifiers defined in java.util.Formatter:

April 27, 2023 - I agree the $ would be nice, too. I think \ is a bit confusing because it means "escape" in Java, so I would expect it to disable string interpolation.

January 16, 2025 - It automatically performs string interpolation by replacing each embedded expression in the template with its value, converted to a string. The JDK includes two other template processors: The FMT Template Processor: It's like the STR template processor except that it accepts format specifiers ...

June 19, 2024 - As part of software development, Java Developers regularly construct strings by combining various objects and expressions. Java Language provides many mechanisms to do so but none of them are convenient. This article talks about a proposed Java 21 JSR 430 — which attempts to rectify this ...

November 27, 2023 - TLDR; The existing String concatenation options are difficult to work with and could be error prone. String Templates (a preview feature introduced in Java 21) greatly improves how we create strings i

August 14, 2023 - Composing a query string with simple-minded interpolation is just as unsafe as composing it with traditional concatenation: String query = "SELECT * FROM Person p WHERE p.last_name = '" + name + "'"; For the Java Platform, we would like to have a string composition feature that achieves the clarity of interpolation but achieves a safer result out-of-the-box, perhaps trading off a small amount of convenience to gain a large amount of safety.

March 27, 2024 - Java 21 has introduced template expressions, drawing inspiration from other programming languages. These expressions enable dynamic string interpolation during runtime.

January 9, 2024 - String name = "Java"; String greeting = STR."Welcome to \{name} 21"; System.out.println(greeting); // Output: Welcome to Java 21 · The embedded expressions within curly braces {} are interpolated at runtime.

May 20, 2023 - JDK 21 will have String Templates as a preview feature. The purpose of this enhancement is to improve the capability of the Java language to incorporate expressions in String Literals and Text Blocks.

June 14, 2023 - It can act like a security guard and even more. We will see that shortly. ... Well , it is not in this case. STR is a template processor which just interpolates the template string.