Call to 'toString()' on array

Reports arrays used in String concatenations or passed as parameters to java.io.PrintStream methods, such as System.out.println().

Usually, the content of the array is meant to be used and not the array object itself.

Example:

  void print(Object[] objects) {
    System.out.println(objects);
  }

After the quick-fix is applied:

  void print(Object[] objects) {
    System.out.println(Arrays.toString(objects));
  }

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.

ImplicitArrayToString

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 ImplicitArrayToString

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

IntelliJ IDEA 2025.2

Inspection Details
By default bundled with:	IntelliJ IDEA 2025.2, Qodana for JVM 2025.2,

Last modified: 18 September 2025