Inspectopedia 2025.2 Help

StringBuilder constructor call with 'char' argument

Reports calls to StringBuffer and StringBuilder constructors with char as the argument. In this case, char is silently cast to an integer and interpreted as the initial capacity of the buffer.

Example:

new StringBuilder('(').append("1").append(')');

After the quick-fix is applied:

new StringBuilder("(").append("1").append(')');

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

NewStringBufferWithCharArgument
Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Java | Probable bugs

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection NewStringBufferWithCharArgument

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

Inspection Details

By default bundled with:

IntelliJ IDEA 2025.2, Qodana for JVM 2025.2,

Last modified: 18 September 2025