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.


 

Ads

Tutorials   
How to read properties file in Java? Generate random numbers in Java Cloneable Interface in Java What is the flaw with the Stack class? List In Java Java Stack Example HashSet In Java Enumeration in java How to generate random number in java Iterator in java Queue in java Transient Java Keyword clone method in Java Java Queue example Logger in Java Java current date - How to get current date in Java Collection : LinkedList Example Collection : ArrayList Example Random alpha numeric string of fixed size Java List Iterator Example The Hashtable Class The BitSet class Java Vector Java Enumeration Data Structures in Java Java Transient Variable Java Date Format Example Java Properties File Example Map.Entry Java Interface Java Property File java preferences,Change the value of Preferences by user Retrieving a Preference Node Java hasNext Write Keys and Values to the Properties file in Java Get All Keys and Values of the Properties files in Java Properties file in Java Properties file in Java Determining If a Preference Node Contains a Specific Value Change the value of Preferences by user Clone method example in Java Implementing a Simple Event Notifier Determining When a Preference Node Is Added or Removed Listening for Changes to Preference Values in a Preference Node Importing Preferences Finding a Preference in a Preference Tree Retrieving the Parent and Child Nodes of a Preference Node Determining If a Preference Node Exists Removing a Preference Node Creating a Preference Node Getting the Maximum Size of a Preference Key and Value
Ads

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 :

PrefFinal.java

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 "PrefFinal.java" 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 PrefFinal.java

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

Advertisements

Share on Google+Share on Google+

Saving and Retrieving The Preferences

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

Advertisements

 

Discuss: Saving and Retrieving The Preferences  

Post your Comment


Your Name (*) :
Your Email :
Subject (*):
Your Comment (*):
  Reload Image
 
 
Comments:0

Ads

 

Ads