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Why Does System.console() Return Null When Debugging in Eclipse?

Susan Sarandon
Release: 2024-12-12 19:55:10
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Why Does System.console() Return Null When Debugging in Eclipse?

System.console() Returns Null in Eclipse Debug Mode

When using the readLine method of BufferedReader to read input or a new password from a user, masking the password with the java.io.Console class is preferred. However, encountering a null return from System.console() while debugging in Eclipse can be frustrating.

Unfortunately, this issue is attributed to a bug (#122429) in Eclipse itself. The workaround involves disabling console logging during debugging:

  1. Navigate to the Eclipse Preferences window (Window > Preferences on Windows/macOS, Eclipse > Preferences on Linux).
  2. Expand the "Java" node and select the "Console" subcategory.
  3. Clear the "Show console only for active contents" checkbox.

This modification allows System.console() to function correctly even when debugging in Eclipse.

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