Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.prefs.PreferenceChangeEvent;
import java.util.prefs.PreferenceChangeListener;
import java.util.prefs.Preferences;

public class Main implements PreferenceChangeListener {
    private Preferences userPrefs;

    public static final String NAMEPREF = "name";

    public static final String EMAILPREF = "email";

    public static void main(String args[]) {
        new Main();
    }

    public Main() {
        userPrefs = Preferences.userNodeForPackage(Main.class);

        System.out.println(userPrefs.get(NAMEPREF, ""));
        System.out.println(userPrefs.get(EMAILPREF, ""));

        userPrefs.put(NAMEPREF, "name");
        userPrefs.put(EMAILPREF, "email");
        Preferences.userNodeForPackage(Main.class).addPreferenceChangeListener(this);
    }

    public void preferenceChange(PreferenceChangeEvent evt) {
        String key = evt.getKey();
        String val = evt.getNewValue();
        if (key.equals(NAMEPREF)) {
            System.out.println(val);
        } else if (key.equals(EMAILPREF)) {
            System.out.println(val);
        }
    }
}