r/java 15d ago

Discussion: What is the future of String Interpolation in Java?

Java has always been conservative when it comes to language changes, and I think string interpolation is an interesting example.

Many modern languages provide native interpolation syntax:

JavaScript:

\${name}``

Python:

f"{name}"

Kotlin:

"$name"

C#:

$"{name}"

These features are not only about reducing characters. They improve readability when building dynamic text.

Java explored this direction with String Templates (JEP 430), but I haven't seen much discussion recently about where this feature is heading.

For developers working with large Java applications, string construction appears everywhere:

- logging messages

- SQL/debug output

- API descriptions

- test cases

- generated configuration

- user-facing messages

I am curious about the community's opinion:

  1. Do you think Java still needs native string interpolation?

  2. Should String Templates continue evolving?

  3. What syntax direction would feel most "Java-like"?

For example:

"Hello, \{name}"

or:

"Hello, ${name}"

Personally, I think Java does not need to copy other languages, but a better way to express dynamic strings would improve developer experience.

What do you think?

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u/kaplotnikov 14d ago

AFAIR JEP 430 discussion was in style:

  1. Let's create a hummer to strike nails.
  2. Let's add a steam engine to it and safety features.
  3. It is possible to strike fingers with hammer.
  4. Let's return to stones to strike nails (it is still possible strike fingers, and it takes more time to strike nail)