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'StringBuilder' can be replaced with 'String'

Reports usages of StringBuffer, StringBuilder, or StringJoiner which can be replaced with a single String concatenation.

Using String concatenation makes the code shorter and simpler.

This inspection only reports when the suggested replacement does not result in significant performance drawback on modern JVMs. In many cases, String concatenation may perform better.

Example:

StringBuilder result = new StringBuilder(); result.append("i = "); result.append(i); result.append(";"); return result.toString();

After the quick-fix is applied:

String result = "i = " + i + ";"; return result;

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,

Can be installed with plugin:

Java, 241.16690

Last modified: 29 April 2024