Where are Java preferences stored on Mac OS X?

Alessandro_Vernet_5295 0
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On Windows, the Java preferences, which you access in your application from java.util.prefs.Preferences are stored in the registry. Where are those stored on Mac OS X?

preferences macos java
3 Answers

From Apple Developer Connection:

The preferences files generated by the Preferences API are named com.apple.java.util.prefs. The user’s preferences file is stored in their home directory (~/Library/Preferences/). The system preferences are stored in /Library/Preferences/ and are only persisted to disk if the user is an administrator.

tgamblin_91220

When I create preferences objects using code:

package pl.marcinchwedczuk.iunrar.gui;

public class AppPreferences {
    private final Preferences preferences = Preferences
            .userNodeForPackage(AppPreferences.class);

Then the settings will be stored in:

/Users/$USER/Library/Preferences/pl.marcinchwedczuk.iunrar.plist

(for some reason gui part is missing, tested on macOS BigSur).

Also remember to call .flush() on preferences objects.

user_17795040
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