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String replacement in java, similar to a velocity template

stackoverflow.com › questions › 3655424 › string-replacement-in-java-similar-to-a-velocity-template

Use StringSubstitutor from Apache Commons Text.

Dependency import

Import the Apache commons text dependency using maven as bellow:

Copy<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-text</artifactId>
    <version>1.10.0</version>
</dependency>

Example

CopyMap<String, String> valuesMap = new HashMap<String, String>();
valuesMap.put("animal", "quick brown fox");
valuesMap.put("target", "lazy dog");
String templateString = "The ${animal} jumped over the ${target}.";
StringSubstitutor sub = new StringSubstitutor(valuesMap);
String resolvedString = sub.replace(templateString);

Answer from JH. on Stack Overflow

Baeldung

baeldung.com › home › java › java string › string templates in java

String Templates in Java | Baeldung

July 7, 2025 - The same is followed for “””<some text>””” to distinguish between TextBlock and TextBlockTemplate. This distinction is important to Java because, even though in both cases it’s wrapped between double quotes(“”), a String template is of type java.lang.StringTemplate, an interface, and not the java.lang.String.

Oracle

docs.oracle.com › en › java › javase › 21 › language › string-templates.html

4 String Templates

January 16, 2025 - String templates complement Java's existing string literals and text blocks by coupling literal text with embedded expressions and template processors to produce specialized results. An embedded expression is a Java expression except it has additional syntax to differentiate it from the literal ...

Discussions

String replacement in java, similar to a velocity template - Stack Overflow

Java 23 withdrew/removed the feature. See the string templates proposal (JEP 430) here. More on stackoverflow.com

stackoverflow.com

There will be no String Template in JDK 23.

wow. It's interesting that Brian Goetz recently said he was ready to finalize the feature and move on, and all the complaints were nothing they hadn't anticipated and discussed extensively. They had the JEP submitted to finalize this for Java 22 and they held off to a second unchanged preview, and then were going to finalize for Java 23, and now, even Goetz is ready to move the whole thing back to a complete redesign. As a Java dev I'd rather get this later with a better design than earlier with a less perfect design. It is interesting how close the existing design was to being finalized. The preview system works :) More on reddit.com

r/java

131

122

April 6, 2024

String.format() is 3x faster in Java 17

Glad to see some of the small enhancements we did in 17 get recognition. Not sure if this one matters, but String::format shows up in profiles every now and then so it felt reasonable to me to give it some TLC in between larger projects. More on reddit.com

r/java

41

298

October 30, 2021

[Java] Using String.format to format a string printed out of my own toString method, I am not able to right align the text though.

Format specifiers can contain an optional width field. For example, %20s will set the minimum width of the String to 20 characters (right-aligned). You can find the documentation here for more info. More on reddit.com

r/learnprogramming

2

9

March 15, 2014

Videos

reddit.com

r/java on Reddit: What Happened to Java's String Templates? Inside ...

May 10, 2024

14:44

YouTube

String Templates - Syntactic sugar or useful improvement? - YouTube

May 3, 2024

09:18

YouTube

Java 21 String Templates | Java 21 New Features - YouTube

What Happened to Java's String Templates? Inside Java Newscast ...

June 20, 2024

youtube.com

Are You Using This NEW Java Feature? - YouTube

May 31, 2024

View all

OpenJDK

openjdk.org › jeps › 465

JEP 465: String Templates (Third Preview)

January 9, 2024 - String Templates were originally proposed as a preview feature by JEP 430, delivered in JDK 21, and previewed a second time by JEP 459, delivered in JDK 22. We here propose to finalize the feature with no further changes. Simplify the writing of Java programs by making it easy to express strings that include values computed at run time.

Stack Overflow

stackoverflow.com › questions › 3655424 › string-replacement-in-java-similar-to-a-velocity-template

String replacement in java, similar to a velocity template - Stack Overflow

Dependency import

Import the Apache commons text dependency using maven as bellow:

Copy<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-text</artifactId>
    <version>1.10.0</version>
</dependency>

Example

CopyMap<String, String> valuesMap = new HashMap<String, String>();
valuesMap.put("animal", "quick brown fox");
valuesMap.put("target", "lazy dog");
String templateString = "The ${animal} jumped over the ${target}.";
StringSubstitutor sub = new StringSubstitutor(valuesMap);
String resolvedString = sub.replace(templateString);

2 of 12

155

Take a look at the java.text.MessageFormat class, MessageFormat takes a set of objects, formats them, then inserts the formatted strings into the pattern at the appropriate places.

CopyObject[] params = new Object[]{"hello", "!"};
String msg = MessageFormat.format("{0} world {1}", params);

Stringtemplate

stringtemplate.org

StringTemplate

StringTemplate is a java template engine (with ports for C#, Objective-C, JavaScript, Scala) for generating source code, web pages, emails, or any other formatted text output. StringTemplate is particularly good at code generators, multiple site skins, and internationalization / localization.

Oracle

docs.oracle.com › en › java › javase › 21 › docs › api › java.base › java › lang › StringTemplate.html

StringTemplate (Java SE 21 & JDK 21)

January 20, 2026 - In the source code of a Java program, a string template or text block template contains an interleaved succession of fragment literals and embedded expressions. The fragments() method returns the fragment literals, and the values() method returns the results of evaluating the embedded expressions.

JetBrains

blog.jetbrains.com › idea › 2023 › 11 › string-templates-in-java-why-should-you-care

String Templates in Java - why should you care? | The IntelliJ IDEA Blog

November 27, 2023 - TLDR; The existing String concatenation ... (a preview feature introduced in Java 21) greatly improves how we create strings in Java by merging constant strings with variable values....

Find elsewhere

Google Bing Mojeek

reddit.com › r/java › there will be no string template in jdk 23.

r/java on Reddit: There will be no String Template in JDK 23.

April 6, 2024 -

"there will be no string template feature, even with --enable-preview, in JDK 23" https://mail.openjdk.org/pipermail/amber-spec-experts/2024-April/004106.html

Top answer

1 of 5

144

wow. It's interesting that Brian Goetz recently said he was ready to finalize the feature and move on, and all the complaints were nothing they hadn't anticipated and discussed extensively. They had the JEP submitted to finalize this for Java 22 and they held off to a second unchanged preview, and then were going to finalize for Java 23, and now, even Goetz is ready to move the whole thing back to a complete redesign. As a Java dev I'd rather get this later with a better design than earlier with a less perfect design. It is interesting how close the existing design was to being finalized. The preview system works :)

2 of 5

36

TBH I would be totally fine with C# style (dolar-prefix of string and expression): $"{x} plus {y} equals {x + y}" Clearly indicated intention, no issue with conflict with legacy strings...

OpenJDK

openjdk.org › jeps › 430

JEP 430: String Templates (Preview)

September 17, 2021 - Enhance the Java programming language with string templates. String templates complement Java's existing string literals and text blocks by coupling literal text with embedded expressions and template processors to produce specialized results.

How to do in Java

howtodoinjava.com › home › java 21 string templates

Java 21 String Templates (with Examples)

July 30, 2024 - Since Java 21, we can create string templates containing the embedded expressions (evaluated at runtime).

nipafx

nipafx.dev › inside-java-newscast-71

What Happened to Java's String Templates? Inside Java Newscast #71 // nipafx

This triggered a super-interesting discussion but it's length and breadth indicated that this issue wouldn't be solved in the remaining 12 weeks or so before JDK 23 would be branched and so the decision was made to remove string templates entirely. And as we've touched on in the last Inside Java Newscast, that's exactly what happened: JDK 23 contains no string templates at all and once you update your experimental and hobby code bases, you'll have to rip out everything related to string templating, which isn't particularly fun.

Published June 20, 2024

Medium

medium.com › @viraj_63415 › java-21-string-templates-79fd908f30ff

Java String Templates — A Better Interpolation | by Viraj Shetty | Medium

June 19, 2024 - With Java 21, Oracle has introduced a Preview feature called String Templates which brings interpolation to Java and much more.

Belief Driven Design

belief-driven-design.com › looking-at-java-21-string-templates-c7cbc

Looking at Java 21: String Templates | belief driven design

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.

OpenJDK

openjdk.org › jeps › 459

JEP 459: String Templates (Second Preview)

August 14, 2023 - Enhance the Java programming language with string templates. String templates complement Java's existing string literals and text blocks by coupling literal text with embedded expressions and template processors to produce specialized results.

HappyCoders.eu

happycoders.eu › java › string-templates

String Templates in Java

June 12, 2025 - STR is the name of a so-called template processor (more precisely: a constant of type StringTemplate.Processor automatically imported into every Java file). A template processor defines how template text and placeholders are combined.

JVM Advent

javaadvent.com › home › beyond the basics: elevating java string handling with custom template processors

Beyond the Basics: Elevating Java String Handling with Custom Template Processors - JVM Advent

December 23, 2023 - At the core of String Templates is a new syntax for Java called ‘template expressions’. This syntax enables efficient and secure string interpolation, going beyond simple string concatenation to transform structured text into various object types based on predefined rules.

JavaDZone

javadzone.com › java-string-templates-practical-examples

Java String Templates in Java 21: Practical Examples - JavaDZone

March 27, 2024 - Template strings, often known as ... and Angular interpolation. Essentially, they allow us to insert variables into a string, and the variable values are determined at runtime....

Medium

maffonso.medium.com › java-string-templates-simplifying-text-handling-1f36f864056e

Java String Templates: Simplifying Text Handling | by Mauricio Afonso | Medium

June 14, 2024 - To understand String Templates, we must start by talking about the structure of this feature. Template Processor + Template + Template Expressions ... mechanism that will process the text STR is a template processor defined in the Java Platform.

InfoQ

infoq.com › news › 2023 › 04 › java-gets-a-boost-with-string

Java Gets a Boost with String Templates: Simplifying Code and Improving Security - InfoQ

April 28, 2023 - JEP 430, String Templates (Preview), ... with string templates, which are similar to string literals but contain embedded expressions incorporated into the string template at run time....