MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

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

public class MainClass implements PreferenceChangeListener {

    private Preferences userPrefs;

    public static final String NAMEPREF = "name";

    public static final String EMAILPREF = "email";

    public static final String AGEPREF = "age";

    public static final String PHONEPREF = "phone";

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

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

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

        userPrefs.put(NAMEPREF, "name");
        userPrefs.put(AGEPREF, "Text");
        userPrefs.put(EMAILPREF, "email");
        userPrefs.put(PHONEPREF, "phone");
        System.out.println("Preferences stored");

        Preferences.userNodeForPackage(MainClass.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);
        } else if (key.equals(AGEPREF)) {
            System.out.println(val);
        } else if (key.equals(PHONEPREF)) {
            System.out.println(val);
        }
    }
}