'Throwable' printed to 'System.out'

Reports calls to System.out.println() with an exception as an argument.

Using print statements for logging exceptions hides the stack trace from you, which can complicate the investigation of the problem. It is recommended that you use logger instead.

Calls to System.out.print(), System.err.println(), and System.err.print() with an exception argument are also reported. It is better to use a logger to log exceptions instead.

The provided quick-fix supports SLF4J and Log4j 2. It replaces System.out.println() call with log calls

Example:

  try {
      foo();
  } catch (Exception e) {
      System.out.println(e);
  }

After the quick-fix is applied:

  try {
      foo();
  } catch (Exception e) {
    log.error("e: ", e);
  }

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.

ThrowablePrintedToSystemOut

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 | Code maturity

Use the Log method for fix option to specify a method which it is used to log a message.

Inspection options

Here you can find the description of settings available for the 'Throwable' printed to 'System.out' inspection, and the reference of their default values.

Log method for fix

Default setting: error

Other available settings:

trace
debug
info
warn

Inspection Details
By default bundled with:	IntelliJ IDEA 2024.3, Qodana for JVM 2024.3,
Can be installed with plugin:	Java, 243.23126

Last modified: 03 December 2024