java.util.prefs.Preferences can be easily used. You have to define a node in which the data is stored. Then you can call the getter and setter methods. The second value is the default value, e.g. if the preference value is not set yet, then this value will be used.

Create the following program.

			
import java.util.prefs.Preferences;

public class PreferenceTest {
	private Preferences prefs;

	public void setPreference() {
		// This will define a node in which the preferences can be stored
		prefs = Preferences.userRoot().node(this.getClass().getName());
		String ID1 = "Test1";
		String ID2 = "Test2";
		String ID3 = "Test3";

		// First we will get the values
		// Define a boolean value
		System.out.println(prefs.getBoolean(ID1, true));
		// Define a string with default "Hello World
		System.out.println(prefs.get(ID2, "Hello World"));
		// Define a integer with default 50
		System.out.println(prefs.getInt(ID3, 50));

		// Now set the values
		prefs.putBoolean(ID1, false);
		prefs.put(ID2, "Hello Europa");
		prefs.putInt(ID3, 45);

		// Delete the preference settings for the first value
		prefs.remove(ID1);

	}

	public static void main(String[] args) {
		PreferenceTest test = new PreferenceTest();
		test.setPreference();
	}
}

		

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Run the program twice. The value of "ID1" should be still true as we delete it. The value of "ID2" and "ID2" should have changed after the first call.

http://www.vogella.de/articles/JavaIntroduction/article.html
Introduction to Java

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Courtesy : vogella.de