Mismatched query and update of 'StringBuilder'

Reports StringBuilder, StringBuffer or StringJoiner objects whose contents are read but not written to, or written to but not read.

Such inconsistent reads and writes are pointless and probably indicate dead, incomplete, or erroneous code.

Example:

  public void m1() {
    StringBuilder sb = new StringBuilder();
    sb.append("a");
  }

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.

MismatchedStringBuilderQueryUpdate

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

Last modified: 18 June 2024