Inspectopedia Help

Concatenation with empty string

Reports empty string operands in string concatenations. Concatenation with the empty string can be used to convert non-String objects or primitives into Strings, but it can be clearer to use a String.valueOf() method call.

A quick-fix is suggested to simplify the concatenation.

Example:

void foo(int x, int y) { String s = "" + x + " ; " + y; }

After the quick-fix is applied:

void foo(int x, int y) { String s = x + " ; " + y; }

Use the Report only where empty strings can be removed without other changes option to ignore cases cases where removing the empty string will require adding a String.valueOf() conversion of another operand.

Inspection options

Here you can find the description of settings available for the Concatenation with empty string inspection, and the reference of their default values.

Report only where empty strings can be removed without other changes

Default: Selected

Inspection Details

Available in:

IntelliJ IDEA 2024.2, Qodana for JVM 2024.2,

Plugin:

Java, 242.SNAPSHOT

Last modified: 20 February 2024