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Ilias is a software developer turned online entrepreneur. He is co-founder and Executive Editor at Java Code Geeks.

Store preferences to user space

This is an example of how to store Preferences to user space. The Preferences class allows applications to store and retrieve user and system preference and configuration data. Storing Preferences to user space implies that you should:

  • Get the root preference node for the calling user, using userRoot() API method of Preferences.
  • Get the named preference for the given pathname of the preference node, with node(String pathName) method of Preferences.
  • Associate the specified value with the specified key in the preference node, using put() API method of Preferences.
  • Associate a string representing a double value with a specified key in this preference node, using putDouble(String key, double value) API method of Preferences.
  • Associate a string representing a boolean value with a specified key in this preference node, using putBoolean(String key, boolean value) API method of Preferences.

Let’s take a look at the code snippet that follows:

public class StaticPreferenceFactory {
    public static void main(String args[]) throws Exception {

  Preferences prefsRoot = Preferences.userRoot();

  Preferences myPrefs = prefsRoot


  myPrefs.put("fruit", "apple");

  myPrefs.putDouble("price", 40);

  myPrefs.putBoolean("available", false);

  return prefsRoot;

This was an example of how to store Preferences to user space in Java.

Related Article:

Reference: Use java.util.prefs.Preferences instead of java.util.Properties from our JCG partner Rahul Sharma at the “The road so far…” blog

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