Top 10 Best Practices for Java Strings (Updated for Java 21 LTS)

Strings are everywhere in Java. Whether you’re processing text, formatting output, or handling user input, using Strings efficiently improves performance, reduces memory waste, and makes code cleaner.

With Java 21, we get new enhancements like StringTemplate, making string handling even more powerful. Let’s explore 10 best practices for working with Strings in Java while leveraging the latest features.

You can read this article for free on my blog: Top 10 Best Practices for Java Strings (Updated for Java 21 LTS).

Credit: https://www.javaguides.net/2025/02/top-10-best-practices-for-java-strings.html

1️⃣ Use StringTemplate Instead of + for String Formatting (Java 21)

Why?

Concatenating strings using + works, but it's messy and error-prone. Java 21 introduces StringTemplate, making string formatting safer and more readable.

✅ Best Practice: Use StringTemplate.STR for cleaner formatting.

🔹 Example: Using StringTemplate the Right Way

import static java.lang.StringTemplate.STR;

public class StringTemplateExample {
    public static void main(String[] args) {
        String name = "Ramesh";
        int age = 30;

        // ✅ Java 21 String Template (Cleaner & Safer)
        String message =…