Share on Google+Share on Google+

Saving and Retrieving The Preferences

Preference values are the constant key/value pairs. In the pairs of key and value the key must be a string and the preference values are stored in a node.

Saving and Retrieving The Preferences

Preference values are the constant  key/value pairs. In the pairs of key and value the key must be a string and the preference values are stored in a node. The preference node associated with java package and if a class named roseindia.class needs to save some preferences, it must save them in the preference node associated with the package roseindia.

In this section you will learn about the way to retrieves the user preference node using the same class and saves and retrieves a preference in the node. Here an example is also provided for learning about the topic in detailed form.

Here is the Complete Code of the Example :

import java.util.prefs.*;

public class PrefFinal {
	public static void main(String[] args) {
		PrefFinal preffinal = new PrefFinal();

	public PrefFinal() {
		String newvalue = "roseindia";
		// Assign value "roseindia" to the String typed variable newvalue.
		Preferences prefs = Preferences.userNodeForPackage(this.getClass());
		// This line declares the preferences for putting and getting the value
		// from the current class.
		prefs.put("PrefsValue", newvalue);
		// This line puts the value "rose" for the preferences key named
		// newvalue.
		String prefs_value = prefs.get("PrefsValue", "");
		// This line gets your set preference value for the the defined
		// preferences key.
		System.out.println("Got PrefsValue '" + prefs_value + "' from prefs");
		// This prints the got preferences value whatever you have set.

After thoroughly knowing the code you should save the file by "" file name and when after compiling the code you run your program you will get the output given below . 

Here is the Output of the Example :

C:\Documents and Settings\Microsoft\Desktop\roseindia>javac

C:\Documents and Settings\Microsoft\Desktop\roseindia>java PrefFinal
Got PrefsValue 'roseindia' from prefs

In the above example we stored the value "roseindia" and retrieve it via user's instruction.

Download This Example


Posted on: February 27, 2008 If you enjoyed this post then why not add us on Google+? Add us to your Circles

Share this Tutorial Follow us on Twitter, or add us on Facebook or Google Plus to keep you updated with the recent trends of Java and other open source platforms.

Discuss: Saving and Retrieving The Preferences  

Post your Comment

Your Name (*) :
Your Email :
Subject (*):
Your Comment (*):
  Reload Image