Simplify Multiline Strings in Java 17 with Text Blocks
This article demonstrates how Java 17's Text Blocks feature lets developers create readable multiline HTML strings without cumbersome concatenation or escape sequences, improving code clarity and reducing errors.
Hello, I'm DD, and today we continue exploring a new Java feature.
Suppose we need a tool that automatically generates project documentation as HTML files. To keep the output readable, proper line breaks and indentation must be preserved.
String html = "<html>
" +
"<body>
" +
" <h1>Java 17 New Feature: Text Blocks | Programmer DD</h1>
" +
" <p>didispace.com</p>
" +
"</body>
" +
"</html>
";Often developers switch to StringBuilder or StringBuffer to improve performance, but they still have to escape characters such as the newline \n , which adds complexity.
When many escape sequences are required, the code becomes harder to write and more error‑prone. Java 17 addresses this with the Text Blocks feature, which simplifies multiline string literals.
Using Text Blocks, the same HTML can be written as:
String html = """
<html>
<body>
<h1>Java 17 New Feature: Text Blocks | Programmer DD</h1>
<p>didispace.com</p>
</body>
</html>
""";This approach is far more concise and readable. Try it out and experience the improvement yourself.
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Programmer DD
A tinkering programmer and author of "Spring Cloud Microservices in Action"
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