Home Java Example Java Util Finding a Preference in a Preference Tree

Finding a Preference in a Preference Tree
Posted on: January 12, 2009 at 12:00 AM

In this section you will learn how to find the preference of Preference node in a Preference Tree.

Finding a Preference in a Preference Tree

In this section you will learn how to find the preference of Preference node in a Preference Tree.

You can see in the given example that we are retrieving the keys and values of the Preference node 'Java Types'. For this, we have create a method find(Preferences p) and use different methods inside it. The method p.name() returns the name of the node. In order to get the keys of the specified node, we have used the method p.getKeys() and the method p.get(s,"") returns the values with respect to the key.

Here is the code of FindPreference.java


import java.util.prefs.*;

import java.util.*;

import java.util.prefs.*;

import java.io.*;



public class FindPreferences {

public void find(Preferences p) throws BackingStoreException{

  System.out.println("Node's name: " + p.name());

  System.out.println("Information of Preference node");

  for(String s : p.keys()) {

  System.out.println("  " + s + " = " + p.get(s, ""));

  }

  }

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

  FindPreferences s=new FindPreferences();

  Preferences root = Preferences.userRoot();

  Preferences prefs = root.node("Java Types");

  s.find(prefs);

  }

}

Output will be displayed as:

Download Source Code:

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